Heat-Resistant Trilayer Separators for High-Performance Lithium-Ion Batteries

Chao Feng; Xuchang Wang; Guangfeng Zeng; Dongjiang Chen; Weiqiang Lv; Yupei Han; Xian Jian; Shi Xue Dou; Jie Xiong; Weidong He

doi:10.1002/pssr.201900504

Heat-Resistant Trilayer Separators for High-Performance Lithium-Ion Batteries

Chao Feng
, Xuchang Wang
, Guangfeng Zeng
, Dongjiang Chen
, Weiqiang Lv
, Yupei Han
, Xian Jian
, Shi Xue Dou
, Jie Xiong^*
, Weidong He

^*Corresponding author for this work

School of Astronautics

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

High-performance rechargeable lithium-ion batteries (LIBs) are central for electric vehicles and portable electronics. However, battery thermal runaway and explosion accidents in practical applications have aroused considerable debates on battery safety. The safety issues are directly associated with the flammable polyolefin separators and organic liquid electrolytes. Herein, a poly(vinylidene fluoride-co-hexafluoropropylene)/Li_6.75La₃Zr_1.75Ta_0.25O₁₂/poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP/LLZTO/PVDF-HFP) trilayer separator with remarkable flammable retardancy and thermal stability is designed. The outer PVDF-HFP layers lead to compatible interfaces with battery electrodes, and the inner LLZTO layer enhances the thermal stability with subtle deformation at 300 °C. LiFePO₄ half batteries assembled with the trilayer separator own a discharge capacity up to 153 mAh g⁻¹ at 0.5 C and capacity retention up to 95% over 200 cycles. This work provides a new avenue to safe and high-performance LIBs.

Original language	English
Article number	1900504
Journal	Physica Status Solidi - Rapid Research Letters
Volume	14
Issue number	1
DOIs	https://doi.org/10.1002/pssr.201900504
State	Published - 1 Jan 2020

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

LiLaZrTaO
flame retardance
lithium-ion batteries
poly(vinylidene fluoride-co-hexafluoropropylene)
trilayer separators

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10.1002/pssr.201900504

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title = "Heat-Resistant Trilayer Separators for High-Performance Lithium-Ion Batteries",

abstract = "High-performance rechargeable lithium-ion batteries (LIBs) are central for electric vehicles and portable electronics. However, battery thermal runaway and explosion accidents in practical applications have aroused considerable debates on battery safety. The safety issues are directly associated with the flammable polyolefin separators and organic liquid electrolytes. Herein, a poly(vinylidene fluoride-co-hexafluoropropylene)/Li6.75La3Zr1.75Ta0.25O12/poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP/LLZTO/PVDF-HFP) trilayer separator with remarkable flammable retardancy and thermal stability is designed. The outer PVDF-HFP layers lead to compatible interfaces with battery electrodes, and the inner LLZTO layer enhances the thermal stability with subtle deformation at 300 °C. LiFePO4 half batteries assembled with the trilayer separator own a discharge capacity up to 153 mAh g−1 at 0.5 C and capacity retention up to 95\% over 200 cycles. This work provides a new avenue to safe and high-performance LIBs.",

keywords = "LiLaZrTaO, flame retardance, lithium-ion batteries, poly(vinylidene fluoride-co-hexafluoropropylene), trilayer separators",

author = "Chao Feng and Xuchang Wang and Guangfeng Zeng and Dongjiang Chen and Weiqiang Lv and Yupei Han and Xian Jian and Dou, \{Shi Xue\} and Jie Xiong and Weidong He",

note = "Publisher Copyright: {\textcopyright} 2019 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2020",

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doi = "10.1002/pssr.201900504",

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TY - JOUR

T1 - Heat-Resistant Trilayer Separators for High-Performance Lithium-Ion Batteries

AU - Feng, Chao

AU - Wang, Xuchang

AU - Zeng, Guangfeng

AU - Chen, Dongjiang

AU - Lv, Weiqiang

AU - Han, Yupei

AU - Jian, Xian

AU - Dou, Shi Xue

AU - Xiong, Jie

AU - He, Weidong

PY - 2020/1/1

Y1 - 2020/1/1

N2 - High-performance rechargeable lithium-ion batteries (LIBs) are central for electric vehicles and portable electronics. However, battery thermal runaway and explosion accidents in practical applications have aroused considerable debates on battery safety. The safety issues are directly associated with the flammable polyolefin separators and organic liquid electrolytes. Herein, a poly(vinylidene fluoride-co-hexafluoropropylene)/Li6.75La3Zr1.75Ta0.25O12/poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP/LLZTO/PVDF-HFP) trilayer separator with remarkable flammable retardancy and thermal stability is designed. The outer PVDF-HFP layers lead to compatible interfaces with battery electrodes, and the inner LLZTO layer enhances the thermal stability with subtle deformation at 300 °C. LiFePO4 half batteries assembled with the trilayer separator own a discharge capacity up to 153 mAh g−1 at 0.5 C and capacity retention up to 95% over 200 cycles. This work provides a new avenue to safe and high-performance LIBs.

AB - High-performance rechargeable lithium-ion batteries (LIBs) are central for electric vehicles and portable electronics. However, battery thermal runaway and explosion accidents in practical applications have aroused considerable debates on battery safety. The safety issues are directly associated with the flammable polyolefin separators and organic liquid electrolytes. Herein, a poly(vinylidene fluoride-co-hexafluoropropylene)/Li6.75La3Zr1.75Ta0.25O12/poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP/LLZTO/PVDF-HFP) trilayer separator with remarkable flammable retardancy and thermal stability is designed. The outer PVDF-HFP layers lead to compatible interfaces with battery electrodes, and the inner LLZTO layer enhances the thermal stability with subtle deformation at 300 °C. LiFePO4 half batteries assembled with the trilayer separator own a discharge capacity up to 153 mAh g−1 at 0.5 C and capacity retention up to 95% over 200 cycles. This work provides a new avenue to safe and high-performance LIBs.

KW - LiLaZrTaO

KW - flame retardance

KW - lithium-ion batteries

KW - poly(vinylidene fluoride-co-hexafluoropropylene)

KW - trilayer separators

UR - https://www.scopus.com/pages/publications/85074559319

U2 - 10.1002/pssr.201900504

DO - 10.1002/pssr.201900504

M3 - 文章

AN - SCOPUS:85074559319

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JO - Physica Status Solidi - Rapid Research Letters

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ER -

Heat-Resistant Trilayer Separators for High-Performance Lithium-Ion Batteries

Abstract

UN SDGs

Keywords

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