Hierarchically Structured Nb2O5 Microflowers with Enhanced Capacity and Fast-Charging Capability for Flexible Planar Sodium Ion Micro-Supercapacitors

Jiaxin Ma, Jieqiong Qin, Shuanghao Zheng, Yinghua Fu, Liping Chi, Yaguang Li, Cong Dong, Bin Li, Feifei Xing, Haodong Shi,4, Zhong-Shuai Wu

Abstract Planar Na ion micro-supercapacitors (NIMSCs) that offer both high energy density and power density are deemed to a promising class of miniaturized power sources for wearable and portable microelectronics.Nevertheless, the development of NIMSCs are hugely impeded by the low capacity and sluggish Na ion kinetics in the negative electrode.Herein, we demonstrate a novel carbon-coated Nb2O5 microflower with a hierarchical structure composed of vertically intercrossed and porous nanosheets, boosting Na ion storage performance.The unique structural merits, including uniform carbon coating, ultrathin nanosheets and abundant pores, endow the Nb2O5 microflower with highly reversible Na ion storage capacity of 245 mAh g-1 at 0.25 C and excellent rate capability.Benefiting from high capacity and fast charging of Nb2O5 microflower, the planar NIMSCs consisted of Nb2O5 negative electrode and activated carbon positive electrode deliver high areal energy density of 60.7 μWh cm-2, considerable voltage window of 3.5 V and extraordinary cyclability.Therefore, this work exploits a structural design strategy towards electrode materials for application in NIMSCs, holding great promise for flexible microelectronics.

KEYWORDS Nb2O5 nanosheets; Microflowers; Sodium ion micro-supercapacitors; Flexibility; Energy storage

1 Introduction

With the booming development of emerging wearable and portable electronics, such as foldable smartphones, shape-conformable healthy monitors and wearable sensors, the flexible and miniaturized energy storage systems are expected to offer excellent energy and power density as well as long lifespan [1–5].A hybrid ion micro-supercapacitor is made up of a battery-type anode and a capacitor-type cathode, which combines the benefits of battery and supercapacitor and achieves a balance between energy density and power density [6–13].In this regard, sodium-ion micro-supercapacitors (NIMSCs) are deemed to a highly competitive class of next-generation miniaturized energy storage devices due to more earth-abundant sodium source and its low cost [14–17].According to the working mechanism of sodium ion capacitors, the battery-type anodes have been reported for enhancing Na ion storage performance, including high capacity (e.g., RuO2, Ti3C2Tx, Ti2C ) [18–20] and decent rate performance (e.g., TiO2, NaTi2(PO4)3, Na3V2(PO4)3) [21–24] and novel polymer materials [25–27], towards well capacity and/or kinetics matching with capacitor-type cathodes.Unfortunately, the attention is rarely focused on simultaneously fortifying the capacity and rate capability of anode materials.Notably, pseudocapacitive materials possess rapid redox reaction and excellent Na ion storage performance, providing a feasible way to address the trade-off between capacity and kinetics [28, 29].

Recently, the orthorhombic niobium pentoxide (T-Nb2O5) with high chemical stability and open framework, exhibiting intercalation pseudocapacitance behavior, has been regarded as a key high-rate anode material for Na ion storage [30–32].Moreover, its large lattice spacing (3.9 Å) corresponding to (001) plane is conducive to fast Na ion (2.04 Å) transport [33, 34].However, the intrinsic poor electronic conductivity of Nb2O5makes it sluggish reaction kinetics, further resulting in low rate capability and cycling performance.So far, several strategies have been applied to boost reaction kinetics,e.g., preparing conductive Nb2O5composites with carbon species [35, 36], and forming porous networks to shorten ion transfer pathway [37, 38].Despite all the designs through combining with high conductive carbon, they are generally the aggregated powders or irregular nanoparticles, far away from the excellent rate capability and ultralong cycling stability for NIMSCs [39, 40].It should be mentioned that three-dimensional (3D) hierarchical micro/nanostructures based on elaborate building blocks not only present favorable structural stability, but also show shortened electron/ion diffusion pathway [41, 42].However, the facile fabrication of Nb2O5with desirable hierarchical architectures and high electrochemical activity remains significant challenges.

In this work, we reported the hierarchical carboncoated Nb2O5microflowers consisted of ultrathin porous nanosheets, serving as negative electrode coupled with actived carbon (AC) positive electrode for planar highperformance NIMSCs with interdigital microelectrodes operated in a high-voltage ionogel electrolyte.The uniform carbon layer onto Nb2O5enhanced the electron migration and structural stability of microelectrodes, and the hierarchical microflower structure enabled the suffi-cient electrolyte contact, shortening ion/electron diffusion pathways.As a consequence, the Nb2O5microflowers delivered a highly reversible capacity of 245 mAh g-1at 0.25 C and good rate capability (122 mAh g-1at 20 C) for Na ion storage.Because of well matched kinetics between high-rate Nb2O5microflowers and capacitor-type AC, the as-fabricated NIMSCs showed high areal capacitance of 41 mF cm-2at 50 μA cm-2, exceptional long-term cyclability and high areal energy density of 60.7 μWh cm-2, exceeding the mostly reported microsupercapacitors [43–45].

2 Experimental Section

2.1 Synthesis of Nb2O5 Mciroflowers

The Nb2O5mciroflowers were prepared via a controllable hydrothermal method and subsequent annealing treatment.First, niobium oxalate hydrate (1 mmol), was dissolved in a mixed solution of ethylene glycol (30 mL) and water (50 mL).Second, the mixture was further stirred for 1 h to obtain homogenous and transparent solution, in which 0.4 mL of ammonium hydroxide was used to adjust the pH to neutral value.Afterwards, the obtained solution was hydrothermal treated at 180 °C for 24 h in a 100 mL steel autoclave.Subsequently, the resultant precursors under a heating rate of 5 °C min-1were annealed at 650 °C (or 500 and 800 °C) for 5 h in air, resulting in Nb2O5microflowers (NF-500, NF-650 and NF-800).For the preparation of the carbon-coated Nb2O5microflowers, the obtianed NF-650 (60 mg) was added into dopamine (30 mg) and tris-base (40 mg) solution (50 mL) under stirring for 6 h.Finally, the carbon-coated Nb2O5microflowers (NF@C-650) were achieved by annealing polydopamine-coated precursors at 600 °C (5 °C min-1) for 3 h in Ar atmosphere.

2.2 Ionogel Electrolyte

NaBF4was first dissolved into 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) to form 1.0 M NaBF4-EMIMBF4solution.Then, poly(vinylidenedifluoridecohexafluoropropylene (PVDF-HFP) acetone dispersion (3 mL) was mixed with the obtained solution under continuous stirring for 2 h.After that, NaBF4-based ionogel electrolyte of NaBF4-EMIMBF4-PVDF-HFP was obtained.microflowers.Finally, the resulting carbon-coated and nitrogen-doped Nb2O5microflowers (NF@C-650) with ultrathin nanosheets and abundant in-plane pores were achieved by annealing at 600 °C in inert atmosphere.The as-prepared Nb2O5microflowers were used as negative electrode coupled with AC as positive electrode to fabricate planar flexible NIMSCs (Fig.1b).Highly conductive EG nanosheets served as the current collectors and conductive additive.The current collector, anode and cathode were successively deposited on nylon membrane via mask-assisted filtration method [46], in which EG nanosheets played a key role on two-dimensional conductive pathway in microelectrodes, forming long-range-ordered electron channels.Applying bent and twisted stress on NIMSCs, they could hold well structural integrity and mechanical flexibility without any delamination for microelectrodes (Fig.1c).

3.2 Characterization of Nb2O5 Microflowers

2.3 Fabrication of NIMSCs

The NIMSCs were obtained through a mask-assisted filtration method [7, 46], in which a stainless-steel mask with interdigitated pattern with eight fingers (four fingers at each side) was used.First, 1 mL electrochemcially exfoliated graphene (EG) dispersion (0.1 mg mL-1) in ethanol was filtrated at the both sides of the mask on a nylon membrane.Then, Nb2O5and AC dispersion (0.5 mg mL-1) was injected into the each side of the same mask, forming negative electrode and positive electrode, respectively.Afterwards, 2 mL dilute EG dispersion (0.02 mg mL-1) was continuously filtrated onto the electrodes.Fianally, after a pressure of 20 MPa via the pressure machine carried out on filtrated electrodes, the NIMSCs were achieved.

3 Results and Discussion

3.1 Fabrication of Nb2O5 Microflowers for NIMSCs

The synthesis process of the Nb2O5microflowers was schematically illustrated in Fig.1a.Firstly, hierarchical Nb2O5microflowers were achieved by combining hydrothermal treatment with subsequent annealing process in air.Then, polydopamine serving as the carbon and nitrogen sources were uniformly coated onto the as-obtained Nb2O5

Fig.1 Schematic illustration of the synthesis process of Nb2O5 microflowers and planar NIMSCs.a Preparation process of carbon-coated Nb2O5 microflowers via hydrothermal method.Nb2O5 microflowers with fast electron/Na ion charge channels and high contact area.b Fabrication process of planar NIMSCs through mask-assisted filtration method, exhibiting highly conductive network for ion and electron transport.c Photographs of the as-fabricated NIMSCs

The evolution process of porous Nb2O5microflower was carefully elucidated by temperature-dependent annealing conditions.The resultant samples via different annealing temperature (i.e., 500, 650, and 800 °C) were denoted as NF-500, NF-650 and NF-800, respectively.The Nb2O5precursors showed a regular microflower-like structure with an average diameter of ～ 3 µm (Fig.2a)..With the annealing treatment, NF-500 maintained the primary intact microflower morphology (Fig.S1), but a small number of impurity phase of precursor was still observed in XRD pattern and Raman spectra (Fig.S2).As the annealing temperature increased to 650 °C, the porous Nb2O5microflowers (NF-650) were obtained (Fig.2b, c).Polydopamine serving as the carbon and nitrogen sources were uniformly coated onto the as-obtained NF-650 (Figs.S3-S4), in which carbon-coated Nb2O5microflowers (NF@C-650) were achieved by annealing at 600 °C in inert atmosphere.Both NF-650 and NF@C-650 could well retain the morphology of the precursors with hierarchical microflowers composed of the vertically intercrossed and porous nanosheets with ultrathin thickness of ～ 30 nm.The XRD patterns of NF-650 and NF@C-650 apparently exhibited the sharp and intense diffraction peaks, confirming orthorhombic-phase (JCPDS NO.30–0873) [47, 48] and highly crystalline Nb2O5without impurities (Fig.S2a).As shown in Raman spectra (Fig.S2b), the broad peak (～ 690 cm-1) and two characteristic peaks (228 and 302 cm-1) are ascribed to Nb2O5[49], and two obviously peaks located at ∼1360 cm-1(D-band) and ∼1595 cm-1(G-band) certified the carbon species on the surface of NF@C-650 [50], in which the carbon content was about 7.8 wt% according to thermogravimetry analysis (Fig.S5).In addition, both the Nb 3d, O 1sXPS spectra and EPR curve identified the existence of abundant oxygen vacancies in NF@C-650 (Fig.S6).The N2adsorption and desorption isotherm displayed characteristic type IV curve with a hysteresis loop, indicative of the mesoporous feature (Fig.S7).The corresponding pore size distribution curve presented average pore sizes at 3.9 nm, which was consistent with TEM observation (Fig.2d, e).The mesopores may derive from the volatilization of organic species at high temperature.Clearly, a thin carbon layer of ～ 5 nm was uniformly coated onto the surface of Nb2O5(Fig.2f).As shown in high-resolution TEM (HRTEM) image (Figs.2f and S8), NF@C-650 displayed the lattice fringe of 0.37 nm corresponding to the (001) crystal face ofT-Nb2O5.Due to the coating of polydopamine, nitrogen heteroatom was brought into the NF@C-650 apart from carbon species.The element mappings of NF@C-650 showed homogeneous distribution of Nb, O, C, N elements in comparison with NF-650 (only Nb and O elements) (Figs.2g and S9).Once the annealing temperature was over 800 °C, the flower-like Nb2O5was fused (NF-800), in which the ultrathin nanosheets were agglomerated into irregular columnar shape, exhibiting actiniae-like morphology (Fig.S10).Thus, the optimal annealing temperature for high-crystallizedT-Nb2O5microflower was 650 °C.

3.3 Electrochemical Performance of Nb2O5 Microflowers

Fig.2 Morphology characterization of Nb2O5 microflowers.a-c SEM images of Nb2O5 precursor (a), NF-650 (b) and NF@C-650 (c).d, e TEM images of NF@C-650 with different magnifications.f HRTEM image of NF@C-650.g STEM image and corresponding EDS mappings of NF@C-650

The sodiation and de-sodiation behaviors of Nb2O5microflowers were evaluated in half cells in NaClO4electrolyte under the potential range of 0.01–3.0 V (vs.Na/Na+) (Fig.3).As shown in cyclic voltammetry (CV) curves (Fig.S11), two irreversible cathodic peaks located at ～ 1.06 and 0.3 V were observed in the first cycle and disappeared in the subsequent cycles, attributing to the side reactions and electrolyte decomposition, forming solid electrolyte interphase layers on the surface of NF@C-650.The NF@C-650 showed continuous slope-type profiles in the galvanostatic charge–discharge (GCD) profiles (Fig.3a) corresponding to the broad cathodic and anodic peaks in the CV curves, indicative of dominant surface pseudocapacitive contribution [33].Remarkably, NF@C-650 delivered a highly reversible capacity of 245 mAh g-1at 0.25 C (1 C = 200 mA g-1), which was higher than those of other Nb2O5microflowers tested at 0.25 C, such as NF-500 (160 mAh g-1), NF-650 (193 mAh g-1) and NF-800 (156 mAh g-1) (Fig.S12a), and extremely exceeding previous reported Nb2O5materials for Na ion storage, such as Nb2O5nanosheets (170 mAh/g at 50 mA g-1) [51], mesoporous Nb2O5nanosheets (230 mAh g-1at 0.25 C) [52].More importantly, NF@C-650 showed excellent rate capability at varying current densities from 0.5 to 20 C (Fig.3b, c), retaining a high capacity of 122 mAh g-1at 20 C, witnessing its fast charging ability, far outperforming NF-500 (36 mAh g-1), NF-650 (52 mAh g-1) and NF-800 (27 mAh g-1) (Fig.S12b).To clarify the high capacity and rate capability of NF@C-650, electrochemical impedance spectroscopy (EIS) was analyzed (Fig.3d).NF@C-650 exhibited a lower charge transfer resistance (Rct) of 217 Ω than NF-500 (322 Ω), NF-650 (302 Ω) and NF-800 (340 Ω).Moreover, NF@C-650 presented a steep slope at the low-frequency Warburg impedance region, revealing the fast ion diffusion behavior in compassion with other controlled samples.It is manifested that NF@C-650 with porous ultrathin nanosheets as building blocks could greatly boost the ion/electron transfer kinetics, thus possessing superior electrochemical performance.In addition, NF@C-650 showed exceptional long-term cycling performance, delivering a stable capacity of ～ 90 mAh g-1accompanying by high Coulombic efficiency of almost 100% and maintaining well structure and flower-like morphology of NF@C-650 after 1000 cycles at 20 C (Figs.3e and S13–S14), demonstrating excellent stability of hierarchically carbon-coated Nb2O5microflower.Based on the above, it is worth noting that flower-like NF@C-650 with a uniform thin carbon layer exhibited well electrochemical performance for Na ion storage, primarily because of its combined advantages, including (i) ultrathin nanosheets with short ion/electron diffusion pathway, (ii) abundant pore structures providing high active surface area for fast electrolyte infiltration and Na ion transport, and (iii) highly conductive carbon layer boosting electron transfer kinetics and improving interface stability.

3.4 Electrochemical Performance of NIMSCs

To demonstrated the applicability of high-performance NF@C-650, we further assembled flexible planar NIMSCs using it as negative electrode and AC as positive electrode, where the EG nanosheets served as the conductive additive and current collector.As shown in Fig.4a, the NF@C-650//AC-NIMSCs were constructed by patterning the asymmetric interdigital microelectrodes using maskassisted filtration method and casting ionogel electrolyte of NaBF4-EMIMBF4-PVDF-HFP [16].The resultant Nb2O5negative electrode and AC positive electrode displayed a thickness of 10 and 13 μm (Fig.S15), respectively.It was clearly seen that the active electrode materials were compactly sandwiched in the highly conductive EG nanosheets used in the top layer (Fig.S16), bottom layer and interlaced intermediate layer, forming a 3D conductive electron transfer channel.As a result, the microelectrodes showed decent conductivity of ～ 42 S cm-1(Fig.S17).Such the elaborate highly conductive NF@C-650 materials with high rate capability were well matched kinetics with typically high-rate capacitor-type AC, which was crucial for designing highperformance NIMSCs.

The electrochemical performance of as-fabricated NIMSCs were examined in high-ionic-conductivity NaBF4based ionogel electrolyte (8.1 mS cm-1) at a voltage of 3.5 V [53].As shown in CV curves (Fig.S18), it was observed that a pair of redox peaks between 2.8 and 3.4 V corresponding to the slope line in the GCD profiles (Fig.4b), indicative of the combined electrochemical behaviors including Na ion intercalation/de-intercalation at NF@C-650 negative electrode and BF4-anion adsorption/desorption at AC positive electrode.Such the battery-capacitor feature demonstrated the successful match between faradaic NF@C-650 and non-faradaic AC.To simultaneously gain the optical charge and kinetics match between positive electrodes and negative electrodes, we implemented the various thickness ratios of NF@C-650 and AC ranging from 1:0.65 to 1:2.6.As a consequence, the resultant NIMSCs delivered gradually increased areal capacitance from 7.01 mF cm-2(1:0.65), 11.2 mF cm-2(1:1.3), 12.1 mF cm-2(1:1.95) to 14.2 mF cm-2(1:2.6) at 20 μA cm-2as increasing the AC thickness (Fig.S19a).Remarkably, the NIMSCs with a thickness ratio of 1:1.3 showed the highest volumetric capacitance of 9.8 F cm-2at 20 μA cm-2(Fig.S19b), compared to NIMSCs (1:0.65) with 8.6 F cm-3, NIMSCs (1:1.95) with 8.2 F cm-3and NIMSCs (1:2.6) with 7.9 F cm-3.In addition, at high current density of 500 μA cm-2, the highest areal capacitance of 5.6 mF cm-2(1:1.3) corresponding to the volumetric capacitance of 4.8 F cm-3was achieved (Fig.4c), suggestive of robust rate capability with 50% of initial capacitance.Therefore, it is unraveled that the optimal thickness ratio of 1:1.3 for negative electrodes to positive electrode was adopted to fabricate high-performance NIMSCs with favorable capacity and kinetics double-matching.

To understand the excellent rate capability of NIMSCs, the ion reaction kinetics was analyzed by CV measurements.As shown in Fig.4d, CV curves showed a pair of redox peaks between 2.5 and 3.5 V at 1–10 mV s-1, indicative of Na ion insertion/extraction at NF@C-650 electrodes.Further, the surface-controlled pseudocapacitive behavior and diffusion-controlled faradaic process were distinguished by the equation ofi=aνb[54], whereνdenotes the scan rate,irepresents the peak current,aandbare variable coeffi-cients [55].Generally, the diffusion-controlled process was confirmed when theb= 0.5, while theb= 1 demonstrated the surface-controlled behavior.It is calculated that thebvalues were 0.836 and 0.977 for anodic and cathodic peaks, respectively, suggesting that the charge storage behavior in NF@C-650//AC-NIMSCs is the dominant surface pseudocapacitive contribution (Fig.4e).Furthermore, the capacitance proportion were quantitatively performed by the following equation:i=k1ν+k2v1/2[56], wherek1andk2are the coefficients.As increasing scan rates from 1 to 10 mV s-1, the capacitive contribution of the total capacitance was continuously increased from 63.7 to 83.5% (Figs.4f and S20).In consequence, it is demonstrated that the high rate capability of NF@C-650//AC-NIMSCs mainly derives from the dominant capacitive-controlled kinetics behaviors.

Fig.4 Electrochemical performance of NF@C-650//AC-NIMSCs.a Schematic diagram of ionogel-based NIMSCs and SEM images of two microelectrodes.b GCD profiles of NIMSCs measured at 20–50 μA cm-2.c Areal capacitance and volumetric capacitance of NIMSCs calculated from GCD profiles at 20–500 μA cm-2.d CV curves obtained at different scan rates from 1 to 10 mV s-1.e The plots between peak current and scan rate.f Normalized capacitance contribution consisted of capacitive and diffusion-controlled contribution at 1–10 mV s-1.g Long-term cycling performance of NIMSCs at 300 μA cm-2.h Ragone plot of NIMSCs compared with the reported micro-supercapacitors

It should be mentioned that the NF@C-650//AC-NIMSCs can offer outstanding areal capacitance of 41 mF cm-2at 50 μA cm-2through increasing the electrode thickness to 40 μm (Fig.S21), higher than the reported hybrid ion microsupercapacitors, such as potassium ion micro-supercapacitor (12.6 mF cm-2) [57].Such remarkable results are ascribed to the fast reaction kinetics of elaborate electrode materials and highly conductive channels in microelectrodes.More importantly, the NF@C-650//AC-NIMSCs showed good long-term cycling stability with a decent capacitance retention of 75% after 8,000 continuous cycles at 300 μA cm-2(Fig.4g).As shown in the Ragone plot (Fig.4h), it was notable that the NIMSCs delivered high areal energy density of 60.7 μWh cm-2, which greatly outnumbered the reported micro-supercapacitors, such as graphene (0.0014 μWh cm-2) [43], graphene/PEDOT (0.089 μWh cm-2) [44], spraycoating graphene (0.028 μWh cm-2) [44], and 3D printing MXene (8.4 μWh cm-2) [45].Morevoer, the NIMSCs exhibited a maximum power density of 1512 μW cm-2at 14.3 μWh cm-2.

3.5 Integration of NIMSCs

To further cater for flexible microelectronics, we evaluated the electrochemical performance of NF@C-650//AC-NIMSCs under various bending angels from 0 to 180° (Fig.5a).Remarkably, the NIMSCs tested at the scan rate of 20 mV s-1showed slight changed CV curves and hold a stable capacitance output without capacitance deterioration from the flat state to a high bending angle of 180° (Fig.5b), indicative of outstanding structual integrity and mechanical flexibility of NF@C-650//AC-NIMSCs.To accommodate different requirements of microelectronics for the voltage and current, we constructed two parallelly or serially connected NIMSCs to boost the capacitance or voltage output without the requirement of metal-based interconnections (Fig.5c).As shown in Fig.5d, the capacitance related to current and discharge time of the integrated NIMSCs proportionally increased while the voltage kept unchanged by consecutively connecting cells in parallel.Besides, the operating voltage exhibited a linear increase from 3.5 V for one cell to 7 V for two serially-connected cells.As examplified, the single and two serially-connected NIMSCs can easily power an ultraviolet sensor (Fig.5e, f), in which the response current was proportionally increased by increasing the serially-connected cell.Notably, there was no obvious change in the current when the NIMSC was in the bending state, witnessing its functional role in flexible power source.These results indicated that the NIMSCs hold great prospect for application for flexible microelectronics devices to meet customized flexible microelectronics.

4 Conclusions

In summary, we have developed novel hierarchical structured Nb2O5microflowers with porous and ultrathin nanosheets and thin carbon-layer, boosting Na ion storage.The elaborate NF@C-650 delivered superior capacity and rate capability.The outstanding electrochemical performance of NF@C-650 was ascribed to the following advantages: (i) ultrathin nanosheets shortened ion/electron diffusion pathway; (ii) abundant pore structures boosted electrolyte infiltration and Na ion transport; (iii) unique carbon layer on the surface of Nb2O5improved the electrical conductivity and interface stability.By matching the NF@C-650 negative electrode and AC positive electrode, the as-obtained planar NIMSCs showed superior areal capacitance of 41 mF cm-2, as well as excellent areal energy density of 60.7 μWh cm-2, outstanding cycling stability and flexibility.Therefore, this work demonstrates that well-designed electrode structure with fast reaction kinetics becomes an appropriate approach for planar hybrids ion micro-supercapacitors.

AcknowledgementsThis work was financially supported by the National Natural Science Foundation of China (Grants.22075279, 22279137, 22125903, 22109040), National Key R&D Program of China (Grant 2022YFA1504100), Dalian Innovation Support Plan for High Level Talents (2019RT09), Dalian National Laboratory For Clean Energy (DNL), CAS, DNL Cooperation Fund, CAS (DNL202016, DNL202019), DICP (DICP I2020032), and the Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy (YLU-DNL Fund 2021002, YLUDNL Fund 2021009).

Declarations

Conflict of InterestThe authors declare no interest conflict.They have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Supplementary InformationThe online version contains supplementary material available at https:// doi.org/ 10.1007/ s40820- 023- 01281-5.