TY  - JOUR
AU  - Li, Yifan
AU  - Fang, Daliang
AU  - Li, Xue Liang
AU  - Yan, Dong
AU  - Xi, Shibo
AU  - Li, Tian Chen
AU  - Lin, Congjian
AU  - Huang, Shaozhuan
AU  - Qiu, Jianbei
AU  - Xu, Xuhui
AU  - Yang, Hui Ying
PY  - 2023
TI  - Asymmetric N, O-Coordinated Single Atomic Co Sites for Stable Lithium Metal Anodes
JO  - Energy & Environmental Materials
SN  - 2575-0348
VL  - 6
IS  - 5
AB  - Lithium metal has been considered one of the most promising anodes for next-generation rechargeable batteries, but its practical application is largely hindered by the uncontrollable dendrite growth and infinite volume change. Here, inspired by superior catalytic effects of single-atom catalysts, carbonsupported single atomic Co with asymmetric N, O-coordination (Co-N/O) is developed for Li metal battery. Experimental results and theoretical calculations indicate that single atomic Co atoms with asymmetric N, O-coordination present enhanced binding ability toward Li in comparison with N-coordinated atomic Co site and isolated O site, enabling uniform Li plating/stripping. Moreover, the asymmetric N, O-coordination around Co atoms induces co-activation effects, lowering the energy barriers toward Li+ to Li0 conversion and largely promoting the deposition kinetics. When used as a Li deposition host, the Co-N/O achieves a high average coulombic efficiency of 98.6% at a current density of 1 mA cm−2 and a capacity of 2 mAh cm−2, long cycling life of 2000 h in symmetrical cells, and excellent rate performance (voltage hysteresis of 23 mV at 8 mA cm−2). This work provides a comprehensive understanding of single atomic metals with asymmetric heteroatom coordination in the design of Li metal anode.
UR  - https://doi.org/10.1002/eem2.12449
DO  - 10.1002/eem2.12449