Dual Protection of a Li–Ag Alloy Anode for All-Solid-State Lithium Metal Batteries with the Argyrodite Li6PS5Cl Solid Electrolyte,ACS Applied Materials & Interfaces

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Dual Protection of a Li–Ag Alloy Anode for All-Solid-State Lithium Metal Batteries with the Argyrodite Li6PS5Cl Solid Electrolyte
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-08-11 , DOI: 10.1021/acsami.2c09013
Bingqin Li ₁ , Zhen Sun _{1,

2} , Na Lv ₁ , Yaqi Hu ₁ , Liangxing Jiang _{1,

3} , Zongliang Zhang _{1,

3} , Fangyang Liu _{1,

2}

Affiliation

All-solid-state lithium metal batteries (ASSLMBs) are considered promising candidates for next-generation energy storage systems. However, the growth of Li dendrites and interface side reactions hinder the practical application of ASSLMBs. To address these issues, a preformed Li–Ag alloy anode for an ASSLMB with the Li₆PS₅Cl electrolyte was constructed. The preformed Li–Ag alloy anode contains two distinct alloy layers, i.e., Li₃Ag and Li_0.98Ag_0.02, with the former as a protection layer and the latter as a Li deposition site. Besides, a beneficial stable interlayer (Ag–P–S–Cl compound) produced by the reaction between Ag and Li₆PS₅Cl could work as a secondary protection layer between the anode and electrolyte. The dual protection (Li₃Ag and Ag–P–S–Cl compound) suppresses dendritic growth and other interfacial issues effectively and simultaneously. Consequently, a LiCoO₂/Li₆PS₅Cl/Li–Ag all-solid-state battery exhibits a remarkable specific capacity and excellent cycle stability. The dual-protection effect from the preformed Li–Ag alloy anode and the investigation of its working mechanism may enlighten a simple strategy for promoting the development of ASSLMBs.

中文翻译：

采用 Argyrodite Li6PS5Cl 固体电解质对全固态锂金属电池的锂银合金负极的双重保护

全固态锂金属电池（ASSLMB）被认为是下一代储能系统的有希望的候选者。然而，锂枝晶的生长和界面副反应阻碍了 ASSLMB 的实际应用。为了解决这些问题，我们构建了一个用于 ASSLMB 的预成型 Li-Ag 合金负极，采用 Li ₆ PS ₅ Cl 电解质。预成型的Li-Ag合金负极包含两个不同的合金层，即Li ₃ Ag 和Li _0.98 Ag _0.02，前者作为保护层，后者作为Li沉积位点。_{此外，Ag 和 Li 6} PS ₅之间的反应产生了有益的稳定中间层（Ag-P-S-Cl 化合物）Cl可以作为阳极和电解质之间的二级保护层。双重保护（Li ₃ Ag 和 Ag-P-S-Cl 化合物）同时有效地抑制了枝晶生长和其他界面问题。因此，LiCoO ₂ /Li ₆ PS ₅ Cl/Li-Ag全固态电池表现出显着的比容量和优异的循环稳定性。预制锂银合金负极的双重保护作用及其工作机理的研究可能会为促进 ASSLMBs 的发展提供一种简单的策略。

更新日期：2022-08-11

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