Amidinothiourea as a new deposition-regulating additive for dendrite-free lithium metal anodes

Ying Lei; Yuxiang Xie; Yixin Huang; Qiong Wang; Zhengang Li; Xiaohong Wu; Yu Qiao; Peng Dai; Ling Huang; Yingjie Hua; Chongtai Wang; Shigang Sun

doi:10.1039/D1CC02829D

Amidinothiourea as a new deposition-regulating additive for dendrite-free lithium metal anodes†

Ying Lei,^a Yuxiang Xie,

^a Yixin Huang,^a Qiong Wang,^a Zhengang Li,^a Xiaohong Wu,^a Yu Qiao,

^a Peng Dai,^a Ling Huang,

*^a Yingjie Hua,^b Chongtai Wang^b and Shigang Sun

*^a

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* Corresponding authors

^a College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
E-mail: yuqiao@xmu.edu.cn, huangl@xmu.edu.cn, sgsun@xmu.edu.cn

^b College of Chemistry and Chemical Engineering, Hainan Normal University, Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province, Haikou 571158, China

Abstract

Lithium (Li) dendrite growth seriously hinders the practical application of Li metal batteries. Here, we report molecular amidinothiourea (ATU) as a new electrolyte additive to regulate Li stripping/plating behaviors of Li metal anodes. The molecular ATU in the electrolyte can act as a shielding layer on the Li metal surface to suppress the decomposition of electrolytes as verified by XPS and adsorption energy calculation, which improves the electrochemical reversibility of the Li plating/stripping behaviors and inhibits lithium dendrite growth.

Chemical Communications

Amidinothiourea as a new deposition-regulating additive for dendrite-free lithium metal anodes†

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