Hydrogen-Bonded Organic Framework as Superior Separator with High Lithium Affinity C═N Bond for Low N/P Ratio Lithium Metal Batteries.

Hydrogen-Bonded Organic Framework as Superior Separator with High Lithium Affinity C═N Bond for Low N/P Ratio Lithium Metal Batteries.

作者:Yang, Yan; Yao, Shiyan; Wu, Yiwen; Ding, Jieying; Liang, Ziwei; Li, Fangkun; Zhu, Min; Liu, Jun

DOI10.1021/acs.nanolett.3c00801

出版时间2023-May-22

已索引2023-05-23

文献类型Journal Article

摘要

Lithium dendrite and side reactions are two major challenges for lithium metal anode. Here, the highly lithophilic triazine ring in the hydrogen-bonded organic framework is recommended to accelerate the desolvation process of lithium ions. Among them, the formation of Li-N bonds between lithium ions and the triazine ring in CAM reduces the diffusion energy barrier of Li+ crossing the SEI interface and the desolvation energy barrier of Li+ exiting from the solvent sheath so that the rapid and homogeneous deposition of lithium-ion can be achieved. Meanwhile, the lithium-ion migration coefficient can be as high as 0.70. CAM separator is used to assemble lithium metal batteries with nickel-rich cathodes (NCM 622). When N/P = 8 and 5, the capacity retention rates of Li-NCM 622 full cell are 78.2% and 80.5% after 200 and 110 cycles, respectively, and the Coulomb efficiency can be maintained at 99.5%, showing excellent cycle stability.

关键词

关键词列表LiN bondsdesolvationhydrogen-bonded organic frameworkslithium metal batterieslithophilic

作者信息

地址

School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou 510641, China.