Boron-Doped Electrolytes as Interfacial Modifiers for High-Rate Stable Lithium Metal Batteries

Dawei Zhu; Jinting Xu; Kun DingQunjie XuPengHui ShiYuLin Min

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Boron-Doped Electrolytes as Interfacial Modifiers for High-Rate Stable Lithium Metal Batteries

机译：Boron-Doped Electrolytes as Interfacial Modifiers for High-Rate Stable Lithium Metal Batteries

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In this article BF3 etching is applied to fabricate basic SEI (B-SEI) layersenriched with LiF and Li_xBF_y. Artificial solid electrolyte interface (A-SEI) witha “stromatolite” structure is formed on top of the B-SEI growth during thecharge-discharge cycles. The structure of A-SEI is characterized laterallyand longitudinally by distribution of TEM elements and depth-profile XPS,providing evidence for the elucidation of a new lattice-tuning Li+ “layered”deposition-type SEI structure. At the same time, the SEI is kept from electrolyteerosion fracturing during deposition, resulting in the growth of dendritesalong the fracture and significantly enhanced cycling stability under high-ratecycling conditions. In particular, A-SEI endows significantly enhanced cyclingcapability to the full battery at high cycling rate and high current density. Thefull cell of A-SEI@Li||LiPF_6||LFP exhibits an extended lifetime after 2000 cyclesat current densities up to 10 C, and still process a CE above 99.0%.

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来源
《Advanced functional materials》 |2023年第23期|2213822.1-2213822.12|共12页
作者
Dawei Zhu; Jinting Xu; Kun DingQunjie XuPengHui ShiYuLin Min;
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作者单位

Shanghai Key Laboratory of Materials Protection and AdvancedMaterials Electric PowerShanghai Engineering Research Centre of Energy-Saving in HeatExchange SystemsShanghai University of Electric PowerShanghai 200090, P. R. China;

Shanghai Key Laboratory of Materials Protection and AdvancedMaterials Electric PowerShanghai Engineering Research Centre of Energy-Saving in HeatExchange SystemsShanghai University of Electric PowerShanghai 200090, P. R. China Shanghai Institute of Pollut;

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正文语种英语
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artificial solid electrolyte interface; crystal growth regulation; electrochemistry; high rate; lithium metal batteries;

Boron-Doped Electrolytes as Interfacial Modifiers for High-Rate Stable Lithium Metal Batteries

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