Rod-shaped CuTe as a novel cathode material for aluminum-ion batteries

• Published in: Dalton transactions : an international journal of inorganic chemistry 2020-01, Vol.49 (3), p.729-736
• Main Authors: Wu, Junnan, Wu, Dongzheng, Zhao, Min, Wen, Zhipeng, Jiang, Jiali, Zeng, Jing, Zhao, Jinbao
• Format: Article
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c9dt04157e

Aluminum-ion batteries (AIBs) are supposed to be one of the energy storage systems with great potentialities on account of their high safety, low cost and high theoretical volumetric capacity. Herein, we report a novel rod-shaped Cu 1.81 Te cathode material for AIBs. At 40 mA g −1 , the initial discharge capacity can reach 144 mA h g −1 . The diffusion coefficient of Al 3+ calculated by the galvanostatic intermittent titration technique (GITT) and cyclic voltammetry (CV) tests at different scan rates is larger than that in sulfides, indicating that telluride has faster kinetics. The results of ex situ X-ray photoelectron spectroscopy (XPS), ex situ X-ray diffraction (XRD) and 27 Al nuclear magnetic resonance (NMR) prove that the mechanism of the charging and discharging processes is the reversible intercalation and deintercalation of Al 3+ , which is very important for the subsequent researchers to understand and investigate the mechanism of the Al/Cu 1.81 Te battery. This work also proves that telluride can also be used as a cathode material for aluminum storage. Aluminum-ion batteries (AIBs) are supposed to be one of the energy storage systems with great potentialities on account of their high safety, low cost and high theoretical volumetric capacity.