具有阻燃性能的静电纺丝纤维素聚合物纳米纤维膜，用于锂离子电池。

Electrospun cellulose polymer nanofiber membrane with flame resistance properties for lithium-ion batteries.

机构信息

College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, PR China; Key Laboratory of Advanced Textile Materials and Manufacturing Technology (Ministry of Education), Zhejiang Sci-Tech University, Hangzhou 310018, PR China; Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou 310018, PR China.

出版信息

Carbohydr Polym. 2020 Apr 15;234:115907. doi: 10.1016/j.carbpol.2020.115907. Epub 2020 Jan 21.

DOI:10.1016/j.carbpol.2020.115907

PMID:32070526

Abstract

Current developments of lithium-ion batteries (LIBs) are mainly focused on improving security and cycle performance. Herein, a novel polyvinylidene fluoride (PVDF)/triphenyl phosphate (TPP)/cellulose acetate (CA) nanofiber membrane was fabricated by one-step electrospinning and used as separator in lithium-ion batteries. Compared to traditional polyethylene membrane, the obtained composite showed higher porosity, elevated thermal stability, superior electrolyte wettability, and improved flame resistance. In addition, batteries assembled with PVDF/TPP/CA membrane exhibited excellent electrochemical properties and cycle stability. The enhanced performances were attributed to the porous structure and presence of CA and TPP. Overall, the proposed hybrid organic cellulose-based composite polymer membranes look promising as separators for advanced LIBs.

摘要

目前，锂离子电池（LIBs）的发展主要集中在提高安全性和循环性能上。在此，通过一步静电纺丝制备了一种新型聚偏二氟乙烯（PVDF）/三苯基膦（TPP）/醋酸纤维素（CA）纳米纤维膜，并将其用作锂离子电池的隔膜。与传统的聚乙烯隔膜相比，所得到的复合隔膜具有更高的孔隙率、更高的热稳定性、更好的电解质润湿性和更高的阻燃性。此外，用 PVDF/TPP/CA 膜组装的电池表现出优异的电化学性能和循环稳定性。这些增强的性能归因于多孔结构以及 CA 和 TPP 的存在。总的来说，所提出的基于混合有机纤维素的复合聚合物隔膜有望成为先进 LIBs 的理想隔膜。