Nano Energy, volume 79, pages 105475

Nanocomposite with fast Li+ conducting percolation network: Solid polymer electrolyte with Li+ non-conducting filler

Xin Ao
Xiaotao Wang
Jiewen Tan 1
Shaolong Zhang
Lei Dong 2
Yan-Yan HU 3
Zhongchang Wang 4
Bingbing Tian
Haihui Wang 1
Publication typeJournal Article
Publication date2021-01-01
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) have attracted considerable research interest because they are expected to solve the safety problems caused by the liquid electrolytes. However, the low ionic conductivity limits their practical applications. Constructing Li + fast conducting network in SPEs with Li + highly conducting ceramic fillers following the mixed matrix membrane concept have shown their limits in raising the Li + conductivity. Herein, a new strategy using Li + non-conducting fillers like CeO 2 nanowires, is proposed to construct a Li + fast conducting network through SPEs. CeO 2 nanowires can dissociate LiTFSI, which results in a high Li + conductivity through the SPEs near to the fiber surface. This experimental finding is confirmed by analytics (FT-IR, Raman and NMR) and theoretical calculations (DFT-MD and COHP). As a result, the network of interwoven CeO 2 nanowires helps form a continuous Li + fast conducting percolation network through the SPEs. The ionic conductivity of the composite SPEs with 10 wt% CeO 2 nanowires is greatly improved (1.1 × 10 −3 S cm −1 at 60 °C). The Li symmetric cells with this composite electrolyte exhibit good cyclic stability (without short circuiting after 2000 h), and the all-solid-state LiFePO 4 /Li cells present a superior cycling performance (remained 140 mA h g −1 after 100 cycles at 1 C). • Li + non-conducting nanofillers are used to construct Li + fast conducting network. • Dissociation process of LiTFSI on the CeO 2 surface is theoretically simulated. • Novel mechanism for the enhancement of Li + conductivity is proposed.

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Ao X. et al. Nanocomposite with fast Li+ conducting percolation network: Solid polymer electrolyte with Li+ non-conducting filler // Nano Energy. 2021. Vol. 79. p. 105475.
GOST all authors (up to 50) Copy
Ao X., Wang X., Tan J., Zhang S., Su C., Dong L., HU Y., Wang Z., Tian B., Wang H. Nanocomposite with fast Li+ conducting percolation network: Solid polymer electrolyte with Li+ non-conducting filler // Nano Energy. 2021. Vol. 79. p. 105475.
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RIS Copy
TY - JOUR
DO - 10.1016/j.nanoen.2020.105475
UR - https://doi.org/10.1016/j.nanoen.2020.105475
TI - Nanocomposite with fast Li+ conducting percolation network: Solid polymer electrolyte with Li+ non-conducting filler
T2 - Nano Energy
AU - Ao, Xin
AU - Wang, Xiaotao
AU - Tan, Jiewen
AU - Zhang, Shaolong
AU - Su, Chenliang
AU - Dong, Lei
AU - HU, Yan-Yan
AU - Wang, Zhongchang
AU - Tian, Bingbing
AU - Wang, Haihui
PY - 2021
DA - 2021/01/01 00:00:00
PB - Elsevier
SP - 105475
VL - 79
SN - 2211-2855
ER -
BibTex
Cite this
BibTex Copy
@article{2021_Ao,
author = {Xin Ao and Xiaotao Wang and Jiewen Tan and Shaolong Zhang and Chenliang Su and Lei Dong and Yan-Yan HU and Zhongchang Wang and Bingbing Tian and Haihui Wang},
title = {Nanocomposite with fast Li+ conducting percolation network: Solid polymer electrolyte with Li+ non-conducting filler},
journal = {Nano Energy},
year = {2021},
volume = {79},
publisher = {Elsevier},
month = {jan},
url = {https://doi.org/10.1016/j.nanoen.2020.105475},
pages = {105475},
doi = {10.1016/j.nanoen.2020.105475}
}
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