Chemical Engineering Journal, volume 382, pages 122935

In-situ crosslinked single ion gel polymer electrolyte with superior performances for lithium metal batteries

Xiang Guan 1
Qingping Wu 2, 3
Xiaowan Zhang 1
Xuhong Guo 1
Chilin Li
Chilin Li 4
Jun Xu 1
Jun Xu
Publication typeJournal Article
Publication date2020-02-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor15.1
ISSN13858947, 03009467
General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering
Environmental Chemistry
Abstract
Conventional dual-ion conductive gel polymer electrolytes (GPEs) attracted tremendous interest for their combined advantages of liquid and solid electrolytes. However, their cycling performance usually degrades due to the concentration polarization of anions. Single lithium ion gel polymer electrolytes (SLIGPEs), which have anions covalently bonded to the polymer or inorganic backbone, can suppress the motion of anions by the interactions between the pedant anions and mobile ions. Especially, Li+ deposition in SLIGPEs can be regulated uniformly to avoid lithium dendrite growth. Herein, novel 3D-structured SLIGPEs were prepared by in-situ crosslinking of lithium (4-styrenesulfonyl) (trifluoromethanesulfonyl) imide (LiSTFSI) with polyethylene glycol dimethacrylate (PEGDMA), soaked with liquid electrolyte. The obtained SLIGPEs not only promote the absorption of liquid electrolyte and accelerate the transport of Li+, but also show a high limitation for the migration of anions, proved by high ionic conductivity (2.74 × 10−5 S cm−1 at room temperature) and high lithium ion transference number (0.622) of SLIGPE-3.5, respectively. The long cycle life (cycling for over 600 h under 0.05 mA cm−2 and 0.1 mA cm−2) of symmetric lithium batteries with SLIGPEs as both separator and electrolyte exhibits good interfacial stability between SLIGPEs and electrodes. Meanwhile, LiFePO4/SLIGPE-2/Li shows a specific discharge capacity of 132.1 mAh g−1 at 0.1 C, 80.0% of the capacity retention ratio and 99.0% of the coulombic efficiency after 150 cycles at room temperature. Moreover, confirmed by SEM, lithium dendrite growth is significantly suppressed during repeated Li plating/stripping cycles. Density functional theory calculations (DFT) confirm the mutual interactions between STFSI− pendants and ions in electrolytes and that between PEO segments and ions. We believe that these in-situ SLIGPEs with superior performances have great potential for the application in lithium metal batteries.

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Guan X. et al. In-situ crosslinked single ion gel polymer electrolyte with superior performances for lithium metal batteries // Chemical Engineering Journal. 2020. Vol. 382. p. 122935.
GOST all authors (up to 50) Copy
Guan X., Wu Q., Zhang X., Guo X., Li C., Li C., Xu J., Xu J. In-situ crosslinked single ion gel polymer electrolyte with superior performances for lithium metal batteries // Chemical Engineering Journal. 2020. Vol. 382. p. 122935.
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RIS Copy
TY - JOUR
DO - 10.1016/j.cej.2019.122935
UR - https://doi.org/10.1016/j.cej.2019.122935
TI - In-situ crosslinked single ion gel polymer electrolyte with superior performances for lithium metal batteries
T2 - Chemical Engineering Journal
AU - Guan, Xiang
AU - Wu, Qingping
AU - Zhang, Xiaowan
AU - Guo, Xuhong
AU - Li, Chilin
AU - Xu, Jun
AU - Li, Chilin
AU - Xu, Jun
PY - 2020
DA - 2020/02/01 00:00:00
PB - Elsevier
SP - 122935
VL - 382
SN - 1385-8947
SN - 0300-9467
ER -
BibTex
Cite this
BibTex Copy
@article{2020_Guan,
author = {Xiang Guan and Qingping Wu and Xiaowan Zhang and Xuhong Guo and Chilin Li and Jun Xu and Chilin Li and Jun Xu},
title = {In-situ crosslinked single ion gel polymer electrolyte with superior performances for lithium metal batteries},
journal = {Chemical Engineering Journal},
year = {2020},
volume = {382},
publisher = {Elsevier},
month = {feb},
url = {https://doi.org/10.1016/j.cej.2019.122935},
pages = {122935},
doi = {10.1016/j.cej.2019.122935}
}
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