Abstract
Aqueous multivalent-metal-ion intercalation chemistries hold genuine promise to develop safe and pow-erful microbatteries for potential use in many miniaturized electronics.However,their development is beset by state-of-the-art electrode materials having practical capacities far below their theoretical val-ues.Here we demonstrate that high compatibility between layered transition-metal oxide hosts and hydrated cation guests substantially boost their multi-electron-redox reactions to offer higher capaci-ties and rate capability,based on typical bipolar vanadium oxides preintercalated with hydrated cations(MxV2O5).When seamlessly integrated on Au current microcollectors with a three-dimensional bicon-tinuous nanoporous architecture that offers high pathways of electron transfer and ion transport,the constituent ZnxV2O5 exhibits specific capacity of as high as～527 mAh g-1 at 5 mV s-1 and re-tains～300 mAh g-1 at 200 mV s-1 in 1 M ZnSO4 aqueous electrolyte,outperforming the MxV2O5(M = Li,Na,K,Mg).This allows aqueous rechargeable zinc-ion microbatteries constructed with sym-metric nanoporous ZnxV2O5/Au interdigital microelectrodes as anode and cathode to show high-density energy of～358 mWh cm-3(a value that is forty-fold higher than that of 4 V/500 μAh Li thin film bat-tery)at high levels of power delivery.
基金项目
国家自然科学基金(51871107)
国家自然科学基金(52130101)
国家自然科学基金(51631004)
Top-notch Young Talent Program of China(W02070051)
Chang Jiang Scholar Program of China(Q2016064)
Program for JLU Science and Technology Innovative Research Team(JLUSTIRT)
Program for JLU Science and Technology Innovative Research Team(2017TD-09)
中央高校基本科研业务费专项()
Program for Innovative Research Team(in Science and Technology)in University of Jilin Province()
NETL
NSTL
维普
万方数据