A Novel Silicon/Phosphorus <i>Co</i>-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries

A Novel Silicon/Phosphorus <i>Co</i>-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries

Developing a solid polymer electrolyte with superior flame retardancy and lithium-ion transportation properties is still a challenge. Herein, an intrinsic silicon/phosphorus co-flame retardant polymer solid electrolyte was prepared by using polyethylene glycol (PEG) co-polymerized with silicon and p...

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Main Authors: Li Zeng, Lu Jia, Xingang Liu, Chuhong Zhang
Format: Article
Language:English
Published: MDPI AG 2020-12-01
Series:Polymers
Subjects:
polymer electrolyte
silicon/phosphorus co-flame retardant
all-solid-state
lithium-ion battery
Online Access:https://www.mdpi.com/2073-4360/12/12/2937
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spelling doaj-0004ac59e8554185a98ff29230b7176b2020-12-10T00:00:36ZengMDPI AGPolymers2073-43602020-12-01122937293710.3390/polym12122937A Novel Silicon/Phosphorus <i>Co</i>-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion BatteriesLi Zeng0Lu Jia1Xingang Liu2Chuhong Zhang3State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, ChinaDeveloping a solid polymer electrolyte with superior flame retardancy and lithium-ion transportation properties is still a challenge. Herein, an intrinsic silicon/phosphorus co-flame retardant polymer solid electrolyte was prepared by using polyethylene glycol (PEG) co-polymerized with silicon and phosphorus-containing monomers. Due to the synergistic flame-retardant effect of silicon and phosphorus elements, this polymer electrolyte exhibits excellent thermal stability and flame resistance. Moreover, the ionic conductivity of the electrolyte at 25 °C is as high as 2.98 × 10<sup>−5</sup> S/cm when the mass ratio of LiN(SO<sub>2</sub>CF<sub>3</sub>)<sub>2</sub> (LiTFSI) and the prepared polymer electrolyte is 10:1. What is more, the LiFePO<sub>4</sub>/Li all-solid-state battery assembled with this solid electrolyte can work stably at a high temperature of 60 °C and exhibits a specific capacity of 129.2 mAh/g at 0.2 C after 100 cycles, providing a promising application prospect for high-safety lithium-ion batteries.https://www.mdpi.com/2073-4360/12/12/2937polymer electrolytesilicon/phosphorus co-flame retardantall-solid-statelithium-ion battery
collection DOAJ
language English
format Article
sources DOAJ
author Li Zeng
Lu Jia
Xingang Liu
Chuhong Zhang
spellingShingle Li Zeng
Lu Jia
Xingang Liu
Chuhong Zhang
A Novel Silicon/Phosphorus <i>Co</i>-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries
Polymers
polymer electrolyte
silicon/phosphorus co-flame retardant
all-solid-state
lithium-ion battery
author_facet Li Zeng
Lu Jia
Xingang Liu
Chuhong Zhang
author_sort Li Zeng
title A Novel Silicon/Phosphorus <i>Co</i>-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries
title_short A Novel Silicon/Phosphorus <i>Co</i>-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries
title_full A Novel Silicon/Phosphorus <i>Co</i>-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries
title_fullStr A Novel Silicon/Phosphorus <i>Co</i>-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries
title_full_unstemmed A Novel Silicon/Phosphorus <i>Co</i>-Flame Retardant Polymer Electrolyte for High-Safety All-Solid-State Lithium Ion Batteries
title_sort novel silicon/phosphorus <i>co</i>-flame retardant polymer electrolyte for high-safety all-solid-state lithium ion batteries
publisher MDPI AG
series Polymers
issn 2073-4360
publishDate 2020-12-01
description Developing a solid polymer electrolyte with superior flame retardancy and lithium-ion transportation properties is still a challenge. Herein, an intrinsic silicon/phosphorus co-flame retardant polymer solid electrolyte was prepared by using polyethylene glycol (PEG) co-polymerized with silicon and phosphorus-containing monomers. Due to the synergistic flame-retardant effect of silicon and phosphorus elements, this polymer electrolyte exhibits excellent thermal stability and flame resistance. Moreover, the ionic conductivity of the electrolyte at 25 °C is as high as 2.98 × 10<sup>−5</sup> S/cm when the mass ratio of LiN(SO<sub>2</sub>CF<sub>3</sub>)<sub>2</sub> (LiTFSI) and the prepared polymer electrolyte is 10:1. What is more, the LiFePO<sub>4</sub>/Li all-solid-state battery assembled with this solid electrolyte can work stably at a high temperature of 60 °C and exhibits a specific capacity of 129.2 mAh/g at 0.2 C after 100 cycles, providing a promising application prospect for high-safety lithium-ion batteries.
topic polymer electrolyte
silicon/phosphorus co-flame retardant
all-solid-state
lithium-ion battery
url https://www.mdpi.com/2073-4360/12/12/2937
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