Reinventing the mechanism of high-performance Bi anode in aqueous K^+ rechargeable batteries  

作　　者：Tingting Qin Xuefeng Chu Ting Deng Boran Wang Xiaoyu Zhang Taowen Dong Zhengming Li Xiaofeng Fan Xin Ge Zizhun Wang Peng Wang Wei Zhang Weitao Zheng 

机构地区：[1]State Key Laboratory of Automotive Simulation and Control,and School of Materials Science&Engineering,and Electron Microscopy Center,and International Center of Future Science,Jilin University,Changchun 130012,Jilin,China [2]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China [3]Key Laboratory of Architectural Cold Climate Energy Management,Ministry of Education,Jilin Jianzhu University,Changchun 130118,Jilin,China [4]State Key Laboratory of Inorganic Synthesis&Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,Jilin,China [5]State Key Laboratory of Superhard Materials,Jilin University,Changchun 130012,Jilin,China[6]Basque Foundation for Science,IKERBASQUE,Bilbao 48013,Spain

出　　处：《Journal of Energy Chemistry》2020年第9期21-28,I0002,共9页能源化学（英文版）

基　　金：financial support provided by the National Natural Science Foundation of China(Grant Nos.51932003,51872115 and 51802110);2020 International Cooperation Project of the Department of Science and Technology of Jilin Province,Program for the Development of Science and Technology of Jilin Province(20190201309JC);Jilin Province/Jilin University Co-Construction Project Funds for New Materials(SXGJSF2017-3,Branch-2/440050316A36);the Open Project Program of Wuhan National Laboratory for Optoelectronics(2018WNLOKF022);Program for JLU Science and Technology Innovative Research Team(JLUSTIRT,2017TD-09);the Fundamental Research Funds for the Central Universities JLU,“Double-First Class”Discipline for Materials Science&Engineering。

摘　　要：Increasing attention has been paid to rechargeable aqueous batteries due to their high safety and low cost.However,they remain in their infancy because of the limited choice of available anode materials with high specific capacity and satisfying cycling performance.Bi metal with layered structure can act as an ideal anode material with high capacity;however,the energy storage mechanism has not well elucidated.Herein,we demonstrate that Bi metal enables affording ultra-high specific capacity(254.3 mAh g^-1),superior rate capability and a capacity retention of 88.8%after 1600 cycles.Different from the previously-reported redox reaction mechanisms of Bi electrode,efficient(de)alloying of K+is responsible for its excellent performance.An excellent aqueous Bi battery is fabricated by matching Bi anode with Co(OH)2 cathode in KOH(1 M)electrolyte.Its outstanding performance is quite adequate and competitive for electrochemical energy storage devices.

关 键 词：Aqueous rechargeable batteries Bi anode K^+ ALLOYING MECHANISM 

分 类 号：TB34[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]