Spent shell as a calcium source for constructing calcium vanadate for high-performance Zn-ion batteries

• Published in: Chemical communications (Cambridge, England) Vol. 6; no. 1; pp. 98 - 11
• Main Authors: Gao, Ningze, Li, Feng, Wang, Zhiyuan, Kong, Xianghua, Wang, Lei, Gu, Yuanxiang, Bai, Maojuan
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 19.12.2023
• Subjects: Calcium carbonate; Calcium vanadates; Cathodes; Discharge; Electrode materials; Energy storage; Raw materials; Rechargeable batteries; Solid wastes
• ISSN: 1359-7345; 1364-548X
• DOI: 10.1039/d3cc04440h

In this article, waste shell is directly used as a raw material to synthesize CaV 3 O 7 as a cathode for aqueous zinc ion batteries. The obtained cathode material exhibits better performance than that of CaV 3 O 7 prepared from pure calcium carbonate as a raw material. At 0.1 A g −1 , the CaV 3 O 7 prepared by spent shell as a calcium source displays a highly reversible discharge capacity of 373 mA h g −1 . A high initial discharge capacity of 177.7 mA h g −1 can be gained at 5.0 A g −1 , and the specific capacity remains at 133.3 mA h g −1 with a capacity retention of 75% after 3000 cycles. This work may spark inspiration for energy storage and generate more effective routes for recycling solid waste. Shell powder is used for the first time as a raw material to synthesize calcium vanadate nanomaterials as a cathode for aqueous zinc ion batteries, which exhibit superior electrochemical performance.