Robust and High-Wettability Pristine Poly(ether ether ketone) Nanofiber Separator for Heat-Resistant and Safe Lithium-Ion Battery

Xin-Ke Dai; Feng-Shan Yu; Jia-Wei Wen; Chun-Xia Wang; Xin-Long Ma; Wang Yang; Guo-Yong Huang; Hai-Mu Ye

doi:10.1007/s10118-023-3002-7

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Robust and High-Wettability Pristine Poly(ether ether ketone) Nanofiber Separator for Heat-Resistant and Safe Lithium-Ion Battery

RESEARCH ARTICLE | Updated：2023-11-27

- Robust and High-Wettability Pristine Poly(ether ether ketone) Nanofiber Separator for Heat-Resistant and Safe Lithium-Ion Battery
- Chinese Journal of Polymer Science Vol. 41, Issue 12, Pages: 1937-1946(2023)
- Affiliations：
  
  a.College of New Energy and Materials, China University of Petroleum, Beijing 102249, China
  b.State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
- Author bio：
  
  huanggy@cup.edu.cn (G.Y.H.)
  yehaimu@cup.edu.cn (H.M.Y.)
- Funds：
- DOI：10.1007/s10118-023-3002-7
  CLC： M
- Received：03 March 2023，
  
  Revised：2023-4-14，
  
  Accepted：11 May 2023，
  
  Online First：26 June 2023，
  
  Published：01 December 2023
- Accepted：
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Dai, X. K.; Yu, F. S.; Wen, J. W.; Wang, C. X.; Ma, X. L.; Yang, W.; Huang, G. Y.; Ye, H. M. Robust and high-wettability pristine poly(ether ether ketone) nanofiber separator for heat-resistant and safe lithium-ion battery. Chinese J. Polym. Sci. 2023, 41, 1937–1946

Xin-Ke Dai, Feng-Shan Yu, Jia-Wei Wen, et al. Robust and High-Wettability Pristine Poly(ether ether ketone) Nanofiber Separator for Heat-Resistant and Safe Lithium-Ion Battery[J]. Chinese Journal of Polymer Science, 2023, 41(12): 1937-1946.
Dai, X. K.; Yu, F. S.; Wen, J. W.; Wang, C. X.; Ma, X. L.; Yang, W.; Huang, G. Y.; Ye, H. M. Robust and high-wettability pristine poly(ether ether ketone) nanofiber separator for heat-resistant and safe lithium-ion battery. Chinese J. Polym. Sci. 2023, 41, 1937–1946 DOI： 10.1007/s10118-023-3002-7.

Xin-Ke Dai, Feng-Shan Yu, Jia-Wei Wen, et al. Robust and High-Wettability Pristine Poly(ether ether ketone) Nanofiber Separator for Heat-Resistant and Safe Lithium-Ion Battery[J]. Chinese Journal of Polymer Science, 2023, 41(12): 1937-1946. DOI： 10.1007/s10118-023-3002-7.

摘要

Poly(ether ether ketone) separator for lithium-ion batteries (LIBs) is fabricated through a strategy consisting of coaxial electrospinning

low-temperature treating

shell removal and hot-pressing. The separator exhibits excellent heat-resistance and electrochemical performance

which allows to get LIBs operating over 150 °C.

Abstract

Separator is a pivotal component of lithium-ion batteries (LIBs) and determines the electrochemical performance and safety. However

with the increase in energy density and application scenarios

commercial polyolefin separators are increasingly unable to undertake heavy responsibility of battery safety protection. Herein

a new kind of nanofiber separator based on poly(ether ether ketone) (PEEK) with excellent thermal stability

self-extinguishing

and superior electrochemical properties is reported. Effective inheritance of intrinsic properties from raw PEEK materials and optimized hot-pressing operation endows the separator with high robustness and wettability

showing tensile strength of 15.8 MPa and a contact angle of 17.2°. The high thermal stability of PEEK can ensure the separator to preserve the structural integrity and microstructure at temperatures beyond 300 °C

and the excellent self-extinguishing peculiarity of PEEK capacitates the high safety of LIB. Notably

benefitting from high porosity and polar surface

the PEEK separator shows high electrolyte uptake of 245.5% and exhibits a wider electrochemical window and faster lithium-ion transport number than commercial polyolefin separators. Furthermore

cells assembled with PEEK separator display better performance than the ones with PE separator

and the PEEK LIB has been successfully used to light up a lamp at a high temperature of 150 °C.

关键词

Keywords

references

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