A Pre‐Oxidation Strategy to Establish Stable Oxide Cathode/Halide Solid‐State Electrolyte Interfaces for High Energy all Solid‐State Batteries DOI

Hanzhou Liu,

Yang Lu, Yanchen Liu

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Abstract All‐solid‐state lithium metal batteries (ASSLBs) are promising for high energy and safety. Halide‐based solid‐state electrolytes, characterized by ionic conductivity a notably wide electrochemical window exceeding 4.3 V, hold significant promise compatibility with high‐energy cathodes. However, oxygen in cathodes exhibits strong tendency to interact the central cation halide electrolyte, forming an unstable cathode‐electrolyte interface (CEI) leading cathodic degradations. Herein, pre‐oxidation strategy is proposed Y based leveraging pre‐establish robust Y─O bonds within electrolyte structure Li 2 YCl 2.5 Br 1.5 O 0.5 (2LO‐0.5). The 2LO‐0.5 effectively hinder uncontrolled interactions 3 ⁺, which would otherwise lead formation of oxidizable YOCl. This stabilization promotes thin, stable Y₂O₃‐based CEI against LiNi 0.83 Co 0.11 Mn 0.06 (NCM83). Therefore, ASSLB assembled NCM83 demonstrates initial discharge‐specific capacity 208 mAh g −1 retained 80.6% its after 1000 cycles, attributed film derived from pre‐oxidized strategy. work offers new insights regulating non‐redox reaction between electrolytes oxide cathodes, promoting rational design high‐performance electrolytes.

Language: Английский

A Pre‐Oxidation Strategy to Establish Stable Oxide Cathode/Halide Solid‐State Electrolyte Interfaces for High Energy all Solid‐State Batteries DOI

Hanzhou Liu,

Yang Lu, Yanchen Liu

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Abstract All‐solid‐state lithium metal batteries (ASSLBs) are promising for high energy and safety. Halide‐based solid‐state electrolytes, characterized by ionic conductivity a notably wide electrochemical window exceeding 4.3 V, hold significant promise compatibility with high‐energy cathodes. However, oxygen in cathodes exhibits strong tendency to interact the central cation halide electrolyte, forming an unstable cathode‐electrolyte interface (CEI) leading cathodic degradations. Herein, pre‐oxidation strategy is proposed Y based leveraging pre‐establish robust Y─O bonds within electrolyte structure Li 2 YCl 2.5 Br 1.5 O 0.5 (2LO‐0.5). The 2LO‐0.5 effectively hinder uncontrolled interactions 3 ⁺, which would otherwise lead formation of oxidizable YOCl. This stabilization promotes thin, stable Y₂O₃‐based CEI against LiNi 0.83 Co 0.11 Mn 0.06 (NCM83). Therefore, ASSLB assembled NCM83 demonstrates initial discharge‐specific capacity 208 mAh g −1 retained 80.6% its after 1000 cycles, attributed film derived from pre‐oxidized strategy. work offers new insights regulating non‐redox reaction between electrolytes oxide cathodes, promoting rational design high‐performance electrolytes.

Language: Английский

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