One-dimensional Cu2-xSe nanorods as the cathode material for high-performance aluminum-ion battery

Jiang, Jiali, Li, He, Fu, Tao, Hwang, Bing Joe, Li, Xue and Zhao, Jinbao (2018) One-dimensional Cu2-xSe nanorods as the cathode material for high-performance aluminum-ion battery. ACS Applied Materials and Interfaces, 10 (21), 17942-17949. (doi:10.1021/acsami.8b03259).

Abstract

© 2018 American Chemical Society. In this work, non-stoichiometric Cu2-xSe fabricated by a facile water evaporation process is used as high-performance Al-ion batteries (AIBs) cathode material. Cu2-xSe electrodes show high reversible capacity and excellent cycling stability, even at high current density of 200 mA g-1, the specific charge capacity in the initial cycle is 241 mAh g-1 and maintains 100 mAh g-1 after 100 cycles with a Coulombic efficiency (CE) of 96.1%, showing good capacity retention. The prominent kinetics of Cu2-xSe electrodes is also revealed by the galvanostatic intermittent titration technique (GITT), which is attributed to the ultrahigh electronic conductivity of Cu2-xSe material. Most importantly, an extensive research is dedicated to investigating the detailed intercalation and deintercalation of relatively large chloroaluminate anions into the cubic Cu2-xSe, which is conducive to better understand the reaction mechanism of Al/Cu2-xSe battery.

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Contributors

Author: He Li

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