Separators play a critical role in lithium-ion batteries.However,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications und...Separators play a critical role in lithium-ion batteries.However,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications under harsh conditions.Here,we report a cellulose-assisted self-assembly strategy to construct a cellulose-based separator massively and continuously.With an ultrahigh ionic conductivity in electrolytes of 3.7 mS·cm^(-1) and the ability to regulate ion transport,the obtained separator is a promising alternative for high-performance lithium-ion batteries.In addition,integrated with high thermal stability,the cellulose-based separator endows batteries with high safety at high temperatures,greatly expanding the application scenarios of energy storage devices in extreme environments.展开更多
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB0450402)the National Key Research and Development Program of China(Nos.2018YFE0202201 and 2021YFA0715700)+3 种基金the National Natural Science Foundation of China(Nos.22293044,U1932213,51732011,22105194,and 92163130)the Major Basic Research Project of Anhui Province(No.2023z04020009)the New Cornerstone Investigator Programcarried out at the USTC Center for Micro and Nanoscale Research and Fabrication。
文摘Separators play a critical role in lithium-ion batteries.However,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications under harsh conditions.Here,we report a cellulose-assisted self-assembly strategy to construct a cellulose-based separator massively and continuously.With an ultrahigh ionic conductivity in electrolytes of 3.7 mS·cm^(-1) and the ability to regulate ion transport,the obtained separator is a promising alternative for high-performance lithium-ion batteries.In addition,integrated with high thermal stability,the cellulose-based separator endows batteries with high safety at high temperatures,greatly expanding the application scenarios of energy storage devices in extreme environments.
