材料科学
阴极
纳米棒
电池(电)
铝
纳米技术
离子
工程物理
复合材料
物理化学
热力学
化学
量子力学
物理
工程类
功率(物理)
作者
Jiali Jiang,Li He,Tao Fu,Bing−Joe Hwang,Xue Li,Jinbao Zhao
标识
DOI:10.1021/acsami.8b03259
摘要
In this work, nonstoichiometric Cu2- xSe fabricated by a facile water evaporation process is used as high-performance Al-ion battery cathode materials. Cu2- xSe electrodes show high reversible capacity and excellent cycling stability, even at a high current density of 200 mA g-1, the specific charge capacity in the initial cycle is 241 mA h g-1 and maintains 100 mA h g-1 after 100 cycles with a Coulombic efficiency of 96.1%, showing good capacity retention. The prominent kinetics of Cu2- xSe electrodes is also revealed by the GITT, which is attributed to the ultrahigh electronic conductivity of the Cu2- xSe material. Most importantly, an extensive research is dedicated to investigating the detailed intercalation and de-intercalation of relatively large chloroaluminate anions into the cubic Cu2- xSe, which is conducive to better understand the reaction mechanism of the Al/Cu2- xSe battery.
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