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	Constructing LiCl-Rich Solid Electrolyte Interphase by High Amine-Containing 1,2,4,5-Benzenetetramine Tetrahydrochloride Additive
	Lin, Zhihua1,2; Bettels, Frederik1,2; Li, Taoran1,2; Satheesh, Sreeja K.1,2; Liu, Yuping3; Zhang, Chaofeng4; Ding, Fei1,2; Zhang, Lin1,2
	2023-12-19
摘要	Strategies that aim to achieve highly stable lithium metal batteries (LMBs) are extensively explored. To date, the controlled formation of high-quality inorganic SEI is still quite challenging, which requires a deep understanding and hence the fine-tuning of solvation chemistry by using functional additives in the electrolyte. In this work, a high amine-containing 1,2,4,5-benzenetetramine tetrahydrochloride (BHCL) is developed as a dual-function electrolyte additive for LMBs. The amine group with a high donor number increases the lithium affinity, while the phenyl group with a strong inductive effect prevents the decomposition of solvents, and the free chloride ions replace anions mediating the formation of the rigid inorganic LiCl-rich SEI layer. The experimental results corroborate the theoretical findings. The modified Li||Li symmetric battery is stably cycled for over 2500 h at 1 mA cm-2 current density with an overpotential of approximate to 45 mV. The performances of the Li||Cu and Li||LFP cells are also significantly enhanced. Therefore, this work provides a promising design principle of multifunctional electrolyte additive. High amine-containing 1,2,4,5-benzenetetramine tetrahydrochloride (BHCL) is used to regulate the solvent sheath and construct LiCl-rich inorganic SEI. The amine group with a high donor number increases the lithium affinity, while the phenyl group with a strong inductive effect prevents the decomposition of solvents, and the free chloride ions replace anions mediating the formation of the rigid inorganic LiCl-rich SEI layer.image
关键词	1,2,4,5-benzenetetramine tetrahydrochloride electrolyte additive lithium metal anode solvent sheath
DOI	10.1002/aelm.202300772
发表期刊	ADVANCED ELECTRONIC MATERIALS
ISSN	2199-160X
页码	8
通讯作者	Liu, Yuping(liuyuping@cigit.ac.cn) ; Zhang, Lin(lin.zhang@fkp.uni-hannover.de)
收录类别	SCI
WOS记录号	WOS:001126798100001
语种	英语