首页|Nano-alumina@cellulose-coated separators with the reinforced-concrete-like structure for high-safety lithium-ion batteries

Nano-alumina@cellulose-coated separators with the reinforced-concrete-like structure for high-safety lithium-ion batteries

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Separators play a critical role in the safety and performance of lithium-ion batteries.However,com-mercial polyolefin separators are limited by their poor affinity with electrolytes and low melting points.In this work,we constructed a reinforced-concrete-like structure by homogeneously dispersing nano-Al2O3 and cellulose on the separators to improve their stability and performance.In this reinforced-concrete-like structure,the cellulose is a reinforcing mesh,and the nano-Al2O3 acts as concrete to support the separator.After constructing the reinforced-concrete-like structure,the separators exhibit good stability even at 200 ℃(thermal shrinkage of 0.3％),enhanced tensile strain(tensile stress of 133.4 MPa and tensile strains of 62％),and better electrolyte wettability(a contact angle of 6.5°).Combining these advantages,the cells with nano-Al2O3@cellulose-coated separators exhibit stable cycling performance and good rate performance.Therefore,the construction of the reinforced-concrete-like structure is a promising technology to promote the application of lithium-ion batteries in extreme environments.

AluminaNanomaterialsLithium-ion batteriesMembranesCelluloseReinforced-concrete-like structure

Zhihao Yang、Li Chen、Jian Xue、Miaomiao Su、Fangdan Zhang、Liangxin Ding、Suqing Wang、Haihui Wang

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Guangdong Provincial Key Lab of Green Chemical Product Technology,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China

Beijing Key Laboratory of Membrane Materials and Engineering,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

Natural Science Foundation of ChinaNatural Science Foundation of ChinaNatural Science Foundation of ChinaNatural Science Foundation of ChinaGuangdong Basic and Applied Basic Research FoundationGuangdong Basic and Applied Basic Research FoundationFundamental Research Funds for the Central Universities

222781502207508622138005221410012022A15150109802023A15150100462022ZYGXZR101

2024

10.1016/j.cjche.2023.07.015

中国化学工程学报(英文版)
中国化工学会

中国化学工程学报(英文版)

CSTPCDEI
影响因子：0.818
ISSN：1004-9541
年,卷(期)：2024.68(4)
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