用于水系锌离子电池阴极的BiSe/氮掺杂碳点纳米片的简便合成

Facile synthesis of BiSe/nitrogen-doped carbon dot nanoplates for aqueous zinc ion battery cathodes.

作者信息

Han Yuxin, Jiu Hongfang, Zhang Lixin, Wang Cundong, Yue Luchao, Wang Congli, Guo Zhixin, Che Sicong, Ma Jinfeng, Li Hui

机构信息

Shanxi Key Laboratory of High Performance Battery Materials and Devices, North University of China, Taiyuan, 030051, People's Republic of China.

School of Chemistry and Chemical Engineering, North University of China, Taiyuan, 030051, People's Republic of China.

出版信息

Phys Chem Chem Phys. 2023 Aug 16;25(32):21350-21357. doi: 10.1039/d3cp02669h.

DOI:10.1039/d3cp02669h

PMID:37529980

Abstract

BiSe is a promising cathode material for aqueous zinc ion batteries (AZIBs), but its limited capacity and poor cycling stability deter its further use in the development of AZIBs. To solve this issue, BiSe/NCD composites have been synthesized a simple two-step solvothermal method. The introduction of nitrogen-doped carbon dots (NCDs) provides more active sites and makes the composite surface rich in functional groups, which facilitates contact with aqueous electrolytes. The results showed that BiSe/NCDs improved the zinc storage properties of BiSe as a cathode material. The discharge specific capacity is 318 mA h g at 0.1 A g. The cycling performance of BiSe/NCDs was also relatively excellent compared to that of BiSe. This work offers a productive and feasible strategy for metal chalcogenides (MCs) as cathode materials for AZIBs to improve the zinc storage capacity.

摘要

铋硒是一种很有前景的水系锌离子电池（AZIBs）正极材料，但其有限的容量和较差的循环稳定性阻碍了它在AZIBs开发中的进一步应用。为了解决这个问题，通过一种简单的两步溶剂热法合成了铋硒/氮掺杂碳点（NCDs）复合材料。氮掺杂碳点的引入提供了更多的活性位点，并使复合材料表面富含官能团，这有利于与水系电解质接触。结果表明，铋硒/NCDs作为正极材料改善了铋硒的储锌性能。在0.1 A g下，放电比容量为318 mA h g。与铋硒相比，铋硒/NCDs的循环性能也相对优异。这项工作为金属硫族化物（MCs）作为AZIBs的正极材料提高储锌容量提供了一种有效且可行的策略。