聚吡咯
插层(化学)
电解质
钒
阴极
电池(电)
材料科学
无机化学
钾离子电池
氧化还原
化学工程
化学
电化学
磷酸钒锂电池
电极
功率(物理)
物理化学
工程类
物理
量子力学
作者
Vivek Verma,Sonal Kumar,William Manalastas,Jianwei Zhao,Rodney Chua,Shize Meng,Pinit Kidkhunthod,Madhavi Srinivasan
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2019-10-28
卷期号:2 (12): 8667-8674
被引量:87
标识
DOI:10.1021/acsaem.9b01632
摘要
Rechargeable zinc-ion batteries (RZIB) present an interesting alternative to rechargeable Li-ion batteries. Among the active materials, layered vanadium-based oxides show a poor cell voltage but modifying this structure by attaching a phosphate group to the vanadium redox center can drastically enhance the cathode voltage. With this layered VOPO4 material, we demonstrate that preintercalating polypyrrole between crystallographic layers and using electrolyte with controlled water amounts are two absolutely essential conditions for easy and reversible Zn2+ (de)intercalation, thus vastly improving battery outputs and long-term capacity retention. We establish that the rational design of open-layered structures hinges imperatively on factors like host structural integrity and electrode–electrolyte compatibility in delivering the performance of multivalent-ion batteries.
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