化学
电池(电)
阴极
电化学
法拉第效率
溴化锌
储能
溴化物
铵
无机化学
锌
有机化学
电极
物理化学
功率(物理)
物理
量子力学
作者
Shengmei Chen,Yiran Ying,Shengnan Wang,Longtao Ma,Haitao Huang,Xiaoqi Wang,Jinkai Xu,Shengchi Bai,Chunyi Zhi
标识
DOI:10.1002/anie.202301467
摘要
Though massive efforts have been devoted to exploring Br-based batteries, the highly soluble Br2 /Br3- species causing rigorous "shuttle effect", leads to severe self-discharge and low Coulombic efficiency. Conventionally, quaternary ammonium salts such as methyl ethyl morpholinium bromide (MEMBr) and tetrapropylammonium bromide (TPABr) are used to fix Br2 and Br3- , but they occupy the mass and volume of battery without capacity contribution. Here, we report an all-active solid interhalogen compound, IBr, as a cathode to address the above challenges, in which the oxidized Br0 is fixed by iodine (I), thoroughly eliminating cross-diffusing Br2 /Br3- species during the whole charging and discharging process. The Zn||IBr battery delivers remarkably high energy density of 385.8 Wh kg-1 , which is higher than those of I2 , MEMBr3 , and TPABr3 cathodes. Our work provides new approaches to achieve active solid interhalogen chemistry for high-energy electrochemical energy storage devices.
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