期刊
JOURNAL OF POWER SOURCES
卷 321, 期 -, 页码 185-192出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.04.115
关键词
Separator; Cellulose; Crystallinity; Paper-making; Lithium-ion battery; Cladophora
资金
- Swedish Foundation for Strategic Research
- Swedish Energy Agency
- Batterifonden (Project TriLi)
- StandUp for Energy
- Bo Rydin Stiftelsen
- Olle Byggmastare Stiftelsen
Much effort is currently made to develop inexpensive and renewable materials which can replace the polyolefin microporous separators conventionally used in contemporary lithium-ion batteries. In the present work, it is demonstrated that mesoporous Cladophora cellulose (CC) separators constitute very promising alternatives based on their high crystallinity, good thermal stability and straightforward manufacturing. The CC separators, which are fabricated using an undemanding paper-making like process involving vacuum filtration, have a typical thickness of about 35 mu m, an average pore size of about 20 nm, a Young's modulus of 5.9 GPa and also exhibit an ionic conductivity of 0.4 mS cm(-1) after soaking with 1 M LiPF6 EC: DEC (1/1, v/v) electrolyte. The CC separators are demonstrated to be thermally stable at 150 degrees C and electrochemically inert in the potential range between 0 and 5 V vs. Li+/Li. A LiFePO4/Li cell containing a CC separator showed good cycling stability with 99.5% discharge capacity retention after 50 cycles at a rate of 0.2 C. These results indicate that the renewable CC separators are well-suited for use in high-performance lithium-ion batteries. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据