Thermal Runaway Mechanism of Composite Cathodes for All‐Solid‐State Batteries

IF 24.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Advanced Energy Materials Pub Date : 2025-02-19 DOI:10.1002/aenm.202405183

Yu Wu, Wenjie Zhang, Xinyu Rui, Dongsheng Ren, Chengshan Xu, Xiang Liu, Xuning Feng, Zhuang Ma, Languang Lu, Minggao Ouyang

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Abstract

Sulfide‐based all‐solid‐state batteries (ASSBs) are widely recognized as one of the most promising next‐generation energy storage technologies. High‐mass‐loaded composite cathode is crucial for the electrochemical performance of ASSBs. However, the safety characteristics of practical composite cathodes have not been reported. Herein, the thermal runaway mechanisms of composite cathodes under different pressures are systematically revealed by employing pellet pressing of the LiNi0.8Co0.1Mn0.1O2 (NCM811) and Li6PS5Cl (LPSC). Completely different from conventional safety perceptions of powder, as the compaction density of the composite cathode increases, an inert P2Sx protective layer is generated in situ via the intensified the redox reactions at the interface, which inhibited exothermic reactions between the oxygen released from the NCM811 and LPSC. This work sheds light on the thermal runaway mechanisms of practical composite cathodes in sulfide‐based ASSBs, which can effectively build a bridge between academic and industrial research for the safety design of ASSBs.

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硫化物全固态电池（ASSB）被公认为最有前途的下一代储能技术之一。高载荷复合阴极对于 ASSB 的电化学性能至关重要。然而，实用复合阴极的安全特性尚未见报道。本文通过对 LiNi0.8Co0.1Mn0.1O2 (NCM811) 和 Li6PS5Cl (LPSC) 的颗粒压制，系统地揭示了复合阴极在不同压力下的热失控机制。与传统的粉末安全观完全不同的是，随着复合阴极压制密度的增加，界面上的氧化还原反应加剧，抑制了 NCM811 和 LPSC 释放出的氧气之间的放热反应，从而在原位生成了惰性 P2Sx 保护层。这项研究揭示了硫化物基 ASSB 中实用复合阴极的热失控机制，为 ASSB 的安全设计在学术研究和工业研究之间架起了一座有效的桥梁。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.