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Title: Phase Behavior and Superprotonic Conductivity in the System (1– x )CsH 2 PO 4 – x H 3 PO 4 : Discovery of Off-Stoichiometric α-[Cs 1–x H x ]H 2 PO 4
Award ID(s):
1847038 2118201
Author(s) / Creator(s):
; ; ; ;
Date Published:
Journal Name:
Chemistry of Materials
Medium: X
Sponsoring Org:
National Science Foundation
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  1. Abstract

    With the increasing use of Li batteries for storage, their safety issues and energy densities are attracting considerable attention. Recently, replacing liquid organic electrolytes with solid‐state electrolytes (SSE) has been hailed as the key to developing safe and high‐energy‐density Li batteries. In particular, Li1+xAlxTi2−x(PO4)3(LATP) has been identified as a very attractive SSE for Li batteries due to its excellent electrochemical stability, low production costs, and good chemical compatibility. However, interfacial reactions with electrodes and poor thermal stability at high temperatures severely restrict the practical use of LATP in solid‐state batteries (SSB). Herein, a systematic review of recent advances in LATP for SSBs is provided. This review starts with a brief introduction to the development history of LATP and then summarizes its structure, ion transport mechanism, and synthesis methods. Challenges (e.g., intrinsic brittleness, interfacial resistance, and compatibility) and corresponding solutions (ionic substitution, additives, protective layers, composite electrolytes, etc.) that are critical for practical applications are then discussed. Last, an outlook on the future research direction of LATP‐based SSB is provided.

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  2. null (Ed.)