Metal chloride solid-state electrolytes and all-solid-state batteries： State-of-the-art developments and perspectives

doi:10.19799/j.cnki.2095-4239.2023.0821

Abstract

Abstract:

Solid-state batteries based on inorganic solid electrolytes with high energy density, long cycle life, and good safety are highly competitive candidates for the next generation of electrochemical energy storage systems. The key to achieving high-performance solid-state batteries is designing and fabricating solid electrolytes with high ionic conductivity, stable interfaces, and deformability. Metal chloride solid electrolytes (MCSEs), emerging as a novel material system, possess anti-oxidation stability of oxide solid electrolytes and high ionic conductivity and mechanical ductility of sulfide solid electrolytes. The fabrication process is simple and requires neither stringent environmental conditions nor extremely high sintering temperatures. It has substantial potential for scalable production, making it one of the most promising choices for commercializing solid-state batteries. This article, through an in-depth analysis of solid electrolyte research progress in the past five years, systematically reviews the research status of MCSEs. These aspects encompass synthesis methodologies, crystal structure studies, ion conduction mechanisms, performance optimization strategies, electrode-electrolyte interfaces, and the potential for practical applications. In addition, the future development directions of MCSEs and potential approaches to address interface issues are discussed, laying the theoretical and experimental foundations for developing high-performance solid-state lithium batteries based on MCSEs.

Key words: metal chlorides, solid-state electrolyte, ion conduction mechanism, all-solid-state batteries

CLC Number:

TM 911

Feng LI, Xiaobin CHENG, Jinda LUO, Hongbin YAO. Metal chloride solid-state electrolytes and all-solid-state batteries： State-of-the-art developments and perspectives[J]. Energy Storage Science and Technology, 2024, 13(1): 193-211.

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Table 1

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Cathode					Lithium		Halide	Energy density
NCM811, 200 mAh/g; S₈,1400 mAh/g					Lithium		Halide	Energy density
ASSLB	CAM/%	Loading/(mg/cm²)	Capacity/(mAh/cm²)	Thickness/μm	Tap density/(g/cm³)	Thickness/μm	Thickness/μm	Wh/L	Wh/kg
Li	85	27	4	80	3.4	40	30	990	400
Li-S	60	10	8.4	70	1.4	80	30	650	500

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