Nano Energy, volume 90, pages 106490

Local electric field effect of montmorillonite in solid polymer electrolytes for lithium metal batteries

Publication typeJournal Article
Publication date2021-12-01
Journal: Nano Energy
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor17.6
ISSN22112855
General Materials Science
Electrical and Electronic Engineering
Renewable Energy, Sustainability and the Environment
Abstract
Solid polymer electrolytes (SPEs) with in-built inorganic fillers are very promising for building safe solid-state batteries, owing to their excellent flexibility, prominent interfacial wettability and low costs. However, the morphology and surface state of inorganic fillers greatly affect ionic conductivity of SPEs. Here, we report that ultraviolet (UV) initiates in situ cross-linking of poly(ethylene glycol) methyl ether acrylate (MPEGA), poly(ethylene glycol) diacrylate (PEGDA) and montmorillonite (MMT) between cathodes and anodes of cell, to produce a solid composite electrolyte (CMP/MMT) that is composed of a robust interpenetrating polymer network matrix and layered MMT nanosheets. Surprisingly, the CMP/MMT delivers a high room-temperature ionic conductivity (~1.06 mS cm −1 ), large lithium-ions transference number (t Li+ = 0.79). The large ionic conductivity enhancement is ascribed to the local electric field effect of montmorillonite (MMT), which accelerates the lithium-ions fast transport in the interlayer of the MMT nanosheets. In addition, the density functional theory (DFT) is conducted to demonstrate the mechanism of improving ionic conductivity. As a result, a solid-state battery with CMP/MMT demonstrates a high capacity of ~140 mAh g −1 and excellent capacity retention of >98% at 0.3 C after 400 cycling. • A solid composite electrolyte (CMP/MMT) is prepared by in situ cross-linking of liquid precursor between cathodes and anodes of cell. • The CMP/MMT delivers a high room-temperature ionic conductivity (~1.06 mS cm −1 ) and large lithium-ions transference number (t Li+ = 0.79). • The DFT demonstrated that the MMT assists in accelerating the dissociation of lithium salts and provides a “highway” for Li + fast transport by local electric field effect. • A solid-state battery with CMP/MMT demonstrates a high capacity of ~140 mAh g −1 and excellent capacity retention of >98% at 0.3 C after 400 cycling.

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Wang Y. et al. Local electric field effect of montmorillonite in solid polymer electrolytes for lithium metal batteries // Nano Energy. 2021. Vol. 90. p. 106490.
GOST all authors (up to 50) Copy
Wang Y., Li Xinyang 李., Qin Y., Zhang D., Song Z., Qi J. Local electric field effect of montmorillonite in solid polymer electrolytes for lithium metal batteries // Nano Energy. 2021. Vol. 90. p. 106490.
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RIS Copy
TY - JOUR
DO - 10.1016/j.nanoen.2021.106490
UR - https://doi.org/10.1016/j.nanoen.2021.106490
TI - Local electric field effect of montmorillonite in solid polymer electrolytes for lithium metal batteries
T2 - Nano Energy
AU - Wang, Yong
AU - Li Xinyang, 李新阳
AU - Qin, Yanyang
AU - Zhang, Dongyang
AU - Song, Zhongxiao
AU - Qi, Junlei
PY - 2021
DA - 2021/12/01 00:00:00
PB - Elsevier
SP - 106490
VL - 90
SN - 2211-2855
ER -
BibTex
Cite this
BibTex Copy
@article{2021_Wang,
author = {Yong Wang and 李新阳 Li Xinyang and Yanyang Qin and Dongyang Zhang and Zhongxiao Song and Junlei Qi},
title = {Local electric field effect of montmorillonite in solid polymer electrolytes for lithium metal batteries},
journal = {Nano Energy},
year = {2021},
volume = {90},
publisher = {Elsevier},
month = {dec},
url = {https://doi.org/10.1016/j.nanoen.2021.106490},
pages = {106490},
doi = {10.1016/j.nanoen.2021.106490}
}
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