Engineering and Technology

High-power lithium-selenium batteries enabled by atomic cobalt electrocatalyst in hollow carbon cathode

H. Tian, H. Tian, et al.

This groundbreaking research by Hao Tian, Huajun Tian, Shijian Wang, Shuangming Chen, Fan Zhang, Li Song, Hao Liu, Jian Liu, and Guoxiu Wang introduces a cobalt single atom electrocatalyst in a hollow carbon cathode, boosting the performance of lithium-selenium batteries by enhancing selenium reactivity and ensuring exceptional cycling stability with nearly perfect efficiency.

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Abstract

Selenium cathodes, while attractive due to high electronic conductivity and volumetric capacity, suffer from low reactivity with lithium, volume changes, and capacity fading. This work introduces a cobalt single atom electrocatalyst in a hollow carbon cathode (CoSA-HC) to address these limitations. The CoSA-HC activates selenium reactivity and immobilizes polyselenides, leading to high discharge capacity, rate capability, and cycling stability with ~100% Coulombic efficiency. This approach opens avenues for high-power lithium-selenium batteries.

Publisher

Nature Communications

Published On

Oct 06, 2020

Authors

Hao Tian, Huajun Tian, Shijian Wang, Shuangming Chen, Fan Zhang, Li Song, Hao Liu, Jian Liu, Guoxiu Wang

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