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Stable Interface between Lithium and Electrolyte Facilitated by a Nanocomposite Protective Layer
Author(s) -
Yang Luyi,
Song Yongli,
Liu Hao,
Wang Zijian,
Yang Kai,
Zhao Qinghe,
Cui Yanhui,
Wen Jiayun,
Luo Wei,
Pan Feng
Publication year - 2020
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201900751
Subject(s) - electrolyte , materials science , lithium (medication) , lithium metal , nanocomposite , anode , ionic conductivity , chemical engineering , fast ion conductor , metal , conductivity , layer (electronics) , nanotechnology , electrode , chemistry , metallurgy , medicine , engineering , endocrinology
Recently, solid‐state lithium batteries (SSLBs) have been considered an ideal solution for the practical application of lithium (Li) metal batteries owing to the excellent safety features of solid‐state electrolytes (SSEs). Among various SSEs, Na superionic conductor (NASICON)‐type Li 1+ x Al x Ti 2− x (PO 4 ) 3 (LATP) holds great potential for its high ionic conductivity, low costs, and high stability. However, LATP tends to be reduced by metallic Li upon contact, posing a major challenge. Herein, a novel coating strategy is proposed to form a nanocomposite protecting layer on Li metal within 30 s. Such a protecting layer not only acts as an artificial solid‐electrolyte interface to conduct Li ion transportation that remains stable after repeated cycling but also effectively precludes the interfacial reaction between Li and LATP by inhibiting the interfacial electron transfer. As a result, the Li/LATP/Li symmetric cells exhibit excellent cycling stability for over 300 h of continuous Li plating/stripping. The assembled full‐cell using coated Li also shows high capacity retention after 500 cycles. Overall, this study demonstrates a facile and transferable method to reduce the reactivity of Li metal anode toward solid electrolytes with relatively high reduction potentials.