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Bi_(2)S_(3) for Aqueous Zn Ion Battery with Enhanced Cycle Stability

查看全文 作　　者：Ting [1,2]Xiong;Yinming [1]Wang;Bosi [1,3]Yin;Wen [1]Shi;Wee Siang Vincent [1]Lee;Junmin [1]Xue 高影响力作者 机构地区：[1]Department of Materials Science and Engineering,National University of Singapore,Singapore 117573,Singapore;[2]Centre for Advanced 2D Materials and Graphene Research Centre,National University of Singapore,Singapore 117546,Singapore;[3]MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,No.92 West‑Da Zhi Street,Harbin 150001,People’s Republic of China高影响力机构 出　　处：《Nano-Micro Letters》索引2020年第12卷第1期,共9页高影响力期刊 基　　金：Singapore MOE Tier 1 funding R-284-000-162-114;Singapore MOE Tier 2 MOE 2018-T2-1-149 摘　　要：Aqueous Zn ion batteries(ZIBs)are promising in energy storage due to the low cost,high safety,and material abundance.The development of metal oxides as the cathode for ZIBs is limited by the strong electrostatic forces between O2−and Zn2+which leads to poor cyclic stability.Herein,Bi2S3 is proposed as a promising cathode material for rechargeable aqueous ZIBs.Improved cyclic stability and fast diffusion of Zn2+is observed.Also,the layered structure of Bi2S3 with the weak van der Waals interaction between layers offers paths for diffusion and occupancy of Zn2+.As a result,the Zn/Bi2S3 battery delivers high capacity of 161 mAh g−1 at 0.2 A g−1 and good cycling stability up to 100 cycles with ca.100%retention.The battery also demonstrates good cyclic performance of ca.80.3%over 2000 cycles at 1 A g−1.The storage mechanism in the Bi2S3 cathode is related to the reversible Zn ion intercalation/extraction reactions and the capacitive contribution.This work indicates that Bi2S3 shows great potential as the cathode of ZIBs with good performance and stability. 关 键 词：AQUEOUS Zn ion battery Bi_(2)S_(3) Good stability
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