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© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Composite polymer electrolytes provide an emerging solution for new battery development by replacing liquid electrolytes, which are commonly complexes of polyethylene oxide (PEO) with ceramic fillers. However, the agglomeration of fillers and weak interaction restrict their conductivities. By contrast with the prevailing methods of blending preformed ceramic fillers within the polymer matrix, here we proposed an in situ synthesis method of SiO2 nanoparticles in the PEO matrix. In this case, robust chemical interactions between SiO2 nanoparticles, lithium salt and PEO chains were induced by the in situ non-hydrolytic sol gel process. The in situ synthesized nanocomposite polymer electrolyte delivered an impressive ionic conductivity of ~1.1 × 10−4 S cm−1 at 30 °C, which is two orders of magnitude higher than that of the preformed synthesized composite polymer electrolyte. In addition, an extended electrochemical window of up to 5 V vs. Li/Li+ was achieved. The Li/nanocomposite polymer electrolyte/Li symmetric cell demonstrated a stable long-term cycling performance of over 700 h at 0.01–0.1 mA cm−2 without short circuiting. The all-solid-state battery consisting of the nanocomposite polymer electrolyte, Li metal and LiFePO4 provides a discharge capacity of 123.5 mAh g−1, a Coulombic efficiency above 99% and a good capacity retention of 70% after 100 cycles.

Details

Title
Preparation of Nanocomposite Polymer Electrolyte via In Situ Synthesis of SiO2 Nanoparticles in PEO
Author
Tan, Xinjie 1 ; Wu, Yongmin 2 ; Tang, Weiping 2 ; Song, Shufeng 1 ; Yao, Jianyao 1 ; Wen, Zhaoyin 3 ; Lu, Li 4 ; Savilov, Serguei V 5 ; Hu, Ning 6   VIAFID ORCID Logo  ; Molenda, Janina 7 

 College of Aerospace Engineering, Chongqing University, Chongqing 400044, China; [email protected] (X.T.); [email protected] (J.Y.) 
 State Key Laboratory of Space Power-sources Technology, Shanghai Institute of Space Power-Sources, Shanghai 200245, China; [email protected] (Y.W.); [email protected] (W.T.) 
 CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; [email protected] 
 Department of Mechanical Engineering, National University of Singapore, Singapore 117575, Singapore; [email protected]; National University of Singapore Suzhou Research Institute, Suzhou 215000, China 
 Chemistry Department, M.V. Lomonosov Moscow State University, Moscow 119991, Russia 
 School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China; State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China 
 Faculty of Energy and Fuels, AGH University of Science and Technology, Al Mickiewicza 30, PL-30059 Krakow, Poland; [email protected] 
First page
157
Publication year
2020
Publication date
2020
Publisher
MDPI AG
e-ISSN
20794991
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2548981529
Copyright
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.