A N/Co co-doped three-dimensional porous carbon as cathode host for advanced lithium–selenium batteries

Fei Gao, Xiang An Yue, Xiang Yu Xu, Peng Xu, Fan Zhang, Hao Sen Fan, Zhou Lu Wang, Yu Tong Wu, Xiang Liu, Yi Zhang

科研成果: 期刊稿件文章同行评审

55 引用 (Scopus)

摘要

Selenium (Se) is a promising cathode material for lithium batteries due to its high volumetric energy density (2528 Wh·L−1). However, its practical application is restricted by rapid capacity fading resulting from the shuttle effect and slow reaction kinetics. Herein, a N/Co co-doped three-dimensional porous carbon (Co-NC) is prepared and used as Se host for lithium–selenium batteries (LSeBs). Co-NC displays a high specific surface area of 1201 m2·g−1 which benefits from N and Co doping. The N and Co not only enhance the electrical conductivity of porous carbon but also possess an adsorption effect on polyselenide. Thus, Se/Co-NC electrode exhibits excellent cycling performance (a stable specific capacity of 480 mAh·g−1 after 200 cycles at 1.0C with a much low-capacity decay of 0.028% per cycle) and outstanding rate performance (a high specific capacity of 414 mAh·g−1 at 5.0C). This work inspires highly stable Se cathode design for LSeBs. Graphical abstract: [Figure not available: see fulltext.]

源语言英语
页(从-至)2670-2678
页数9
期刊Rare Metals
42
8
DOI
出版状态已出版 - 8月 2023

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