首页|A sustainable green strategy: Flame-retardant cellulose-based separators for enhancing the safety and cycle stability of lithium-ion batteries

A sustainable green strategy: Flame-retardant cellulose-based separators for enhancing the safety and cycle stability of lithium-ion batteries

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© 2024 Elsevier B.V.Lithium-ion battery (LIB) separators act an essential role on maintaining electrochemical properties and safety, while polyolefin-based separators exhibit poor thermal stability, resulting in potential safety concerns. In this work, based on 4-aminopyridine (4-AP) and hexachlorocyclotriphosphazene (HCCP), cellulose-based separator modified by HCCP cross-linked 4-AP, named CBS@H-AP, is fabricated to improve the safety and electrochemical stability of LIB. CBS@H-AP is synthesized through the crosslinking reaction of H-AP on the cellulose surface. CBS@H-AP demonstrates low flammability (self-extinguishing) and high thermal-dimensional stability (no apparent heat shrinkage at 240 °C for 5 min). Furthermore, CBS@H-AP discloses high porosity (68.4 %) and wettability (a contact angle of electrolyte of 15.1°). LIB utilizing CBS@H-AP separator unfolds excellent cycle stability, maintaining a capacity retention of 97.2 % and an average coulombic efficiency of 99.2 % at 0.5C over 100 cycles. This work opens up new possibilities for the application of cellulose-based separators in enhancing the safety and cycle stability of LIBs.

4-AminopyridineCellulose-based separatorFlame retardancyHexachlorocyclotriphosphazeneLithium-ion batteries

Ren J.、Guo J.、Luo X.、Dai X.、Kong D.、Ping Ping、Zhang G.

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College of Mechanical and Electronic Engineering China University of Petroleum (East China)

College of Mechanical and Electronic Engineering China University of Petroleum (East China)||State Key Laboratory of Chemical Safety China University of Petroleum (East China)

College of Chemistry and Chemical Engineering China University of Petroleum (East China)||College of Mechanical and Electronic Engineering China University of Petroleum (East China)College of Mechanical and Electronic Engineering China University of Petroleum (East China)||State Key Laboratory of Chemical Safety China University of Petroleum (East China)||

School of Safety Engineering China University of Mining and Technology

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2025

10.1016/j.jpowsour.2024.235862

Journal of power sources

Journal of power sources

SCI
ISSN：0378-7753
年,卷(期)：2025.628(Feb.1)
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