Chemical Engineering Journal, volume 449, pages 137682

Stabilizing solid electrolyte/Li interface via polymer-in-salt artificial protection layer for high-rate and stable lithium metal batteries

Publication typeJournal Article
Publication date2022-12-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor15.1
ISSN13858947, 03009467
General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering
Environmental Chemistry
Abstract
• A polymer-in-salt (PiS) interlayer is adopted to stabilize the solid electrolyte/Li interface. • PVDF-HFP with 60 wt% LiTFSI shows high conductivity, high stability towards Li metal and easy processing ability. • The LFP||LATP@PiS||Li full cell showed outstanding rate capability (124.0 mA·h·g −1 at 2.0C under 60 °C) and cyclability. Solid electrolytes are fundamental for next-generation solid-state Li-metal batteries that promise high energy density and safety. However, various solid electrolytes suffer from chemical/electrochemical instability against Li metal and poor interfacial contact with electrodes. Herein, a polymer-in-salt (PiS) artificial protection layer composed of fluoropolymer in highly-concentrated lithium salt (labeled as PiSPL) is introduced to address these problems using NASICON-type Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) as a typical solid electrolyte. The resulted PiSPL layer exhibits small thickness (10 μm), good chemical/electrochemical stability, and excellent ionic conductivity (0.5 and 1.8 mS cm −1 at 25 and 60 °C, respectively). These properties endow the LATP/Li interface with improved contact, favorable Li + diffusion, and, most importantly, inhibited interfacial reactions, which is examined using ex-situ X-ray photoelectron spectroscopy and electrochemical analyses and morphological observations. Consequently, Li||LATP@PiSPL||Li symmetric cells can deliver small overpotentials at various current densities and long lifetime at 0.16 mA cm −2 over 400 h. On the contrary, the same configuration cells with LATP die after only 50 h. Moreover, the LiFePO 4 ||LATP@PiSPL||Li solid-state full cells exhibit excellent rate capability (124.0 mA h g −1 at 2.0C) and cyclability (148.9 and 140.6 mA h g −1 after 200 cycles at 0.2C and 300 cycles at 1.0C, respectively). The PiS strategy represents a general and effective approach to stabilize various solid electrolyte/Li interfaces to push solid-state Li-metal batteries forward.

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GOST Copy
Pan L. et al. Stabilizing solid electrolyte/Li interface via polymer-in-salt artificial protection layer for high-rate and stable lithium metal batteries // Chemical Engineering Journal. 2022. Vol. 449. p. 137682.
GOST all authors (up to 50) Copy
Pan L., Sun S., Yu G., Liu X., Feng S., Zhang W., Turgunov M., Wang Y., Sun Z. Stabilizing solid electrolyte/Li interface via polymer-in-salt artificial protection layer for high-rate and stable lithium metal batteries // Chemical Engineering Journal. 2022. Vol. 449. p. 137682.
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RIS Copy
TY - JOUR
DO - 10.1016/j.cej.2022.137682
UR - https://doi.org/10.1016/j.cej.2022.137682
TI - Stabilizing solid electrolyte/Li interface via polymer-in-salt artificial protection layer for high-rate and stable lithium metal batteries
T2 - Chemical Engineering Journal
AU - Pan, Long
AU - Sun, Shuo
AU - Yu, Genxi
AU - Liu, Xiongxiong
AU - Feng, Shengfa
AU - Zhang, Wei
AU - Turgunov, Muhammadali
AU - Wang, Yaping
AU - Sun, Zheng-Ming
PY - 2022
DA - 2022/12/01 00:00:00
PB - Elsevier
SP - 137682
VL - 449
SN - 1385-8947
SN - 0300-9467
ER -
BibTex
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BibTex Copy
@article{2022_Pan,
author = {Long Pan and Shuo Sun and Genxi Yu and Xiongxiong Liu and Shengfa Feng and Wei Zhang and Muhammadali Turgunov and Yaping Wang and Zheng-Ming Sun},
title = {Stabilizing solid electrolyte/Li interface via polymer-in-salt artificial protection layer for high-rate and stable lithium metal batteries},
journal = {Chemical Engineering Journal},
year = {2022},
volume = {449},
publisher = {Elsevier},
month = {dec},
url = {https://doi.org/10.1016/j.cej.2022.137682},
pages = {137682},
doi = {10.1016/j.cej.2022.137682}
}
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