Regulating the Solvation Structure of Li+ Enables Chemical Prelithiation of Silicon-Based Anodes Toward High-Energy Lithium-Ion Batteries,Nano-Micro Letters

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Regulating the Solvation Structure of Li+ Enables Chemical Prelithiation of Silicon-Based Anodes Toward High-Energy Lithium-Ion Batteries
Nano-Micro Letters ( IF 31.6 ) Pub Date : 2023-04-18 , DOI: 10.1007/s40820-023-01068-8
Wenjie He _{1,

2} , Hai Xu ₁ , Zhijie Chen ₁ , Jiang Long ₁ , Jing Zhang ₁ , Jiangmin Jiang _{1,

3} , Hui Dou ₁ , Xiaogang Zhang ₁

Affiliation

By selecting 4-methylbiphenyl as an anion ligand and 2-methyltetrahydrofuran as a solvent, the as-prepared micro-sized SiO/C anode can achieve an initial Coulombic efficiency of ~100%.
Molecular dynamics simulations demonstrate that the ideal prelithiation efficiency can be achieved by choosing appropriate anion ligand and solvent to regulate the solvation structure of Li⁺.
The positive effect of pre-lithiation on cycle performance has been verified by using an in-situ electrochemical dilatometry and solid electrolyte interphase film.

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