二硫化钼
电化学
阳极
阴极
电池(电)
材料科学
电解质
氧化还原
电极
储能
无机化学
化学工程
光电子学
化学
功率(物理)
复合材料
冶金
物理化学
工程类
物理
量子力学
作者
Yu-Zuo Wang,Xu-yi Shan,Dawei Wang,Zhenhua Sun,Hui‐Ming Cheng,Feng Li
出处
期刊:Joule
[Elsevier]
日期:2018-07-01
卷期号:2 (7): 1278-1286
被引量:36
标识
DOI:10.1016/j.joule.2018.04.007
摘要
Summary
The symmetrical configuration is attractive for electrochemical energy storage devices due to using one electrode material, but it is difficult to achieve for a rechargeable battery. Here, we propose an electrochemical activity modulation method to construct a quasi-symmetrical rechargeable battery with decoupled conversion reactions of the anionic/cationic counterparts of covalent transition metal sulfides. The modulated process contains potential window and electrolyte modulation, followed by a predesigned conversion reaction. For molybdenum disulfide (MoS2), after cathodic modulation the sulfur redox (S0 to S2−) inside MoS2 was activated as redox center of cathode, resulting in a capacity increase of one order of magnitude and high cycling stability. Meanwhile, an anodic-modulated MoS2 anode displayed high capacity due to the reversible conversion between Mox+ and Mo0. Coupling this cathode and anode, a quasi-symmetrical battery is fabricated and opens up a new direction for building high-energy electrochemical systems.
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