凝胶型锂离子电池的制作及电化学和安全性能

doi:10.19799/j.cnki.2095-4239.2020.0424

储能科学与技术 ›› 2021, Vol. 10 ›› Issue (3): 1025-1031.doi: 10.19799/j.cnki.2095-4239.2020.0424

凝胶型锂离子电池的制作及电化学和安全性能

涂健¹(), 徐雄文¹, 胡海波¹, 聂阳¹, 曾涛¹, 孙秋实², 成浩², 谢健²(), 赵新兵²

^1.湖南立方新能源科技有限责任公司，湖南株洲 412000
^2.浙江大学材料科学与工程学院，浙江杭州 310027

收稿日期:2020-12-31 修回日期:2021-01-22 出版日期:2021-05-05 发布日期:2021-04-30
通讯作者: 谢健 E-mail:kenttu@lifuntech.com;xiejian1977@zju.edu.cn
作者简介:涂健（1976—），男，博士，高级工程师，研究方向为锂离子电池，E-mail：kenttu@lifuntech.com
基金资助:
湖南省重大科技项目(2020GK1014);国家自然科学基金项目(51572238);浙江省自然科学基金(LY19E020013)

Fabrication of gel-type Li-ion batteries and their electrochemical and safety properties

Jian TU¹(), Xiongwen XU¹, Haibo HU¹, Yang NIE¹, Tao ZENG¹, Qiushi SUN², Hao CHENG², Jian XIE²(), Xinbing ZHAO²

^1.Hunan Cube New Energy Technology Co. Ltd. , Zhuzhou 412000, Hunan, China
^2.School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China

Received:2020-12-31 Revised:2021-01-22 Online:2021-05-05 Published:2021-04-30
Contact: Jian XIE E-mail:kenttu@lifuntech.com;xiejian1977@zju.edu.cn

摘要/Abstract

摘要：

采用原位聚合法制备了凝胶型软包锂离子电池，该电池包括钴酸锂正极、石墨负极、镀陶瓷聚乙烯隔膜，以及弥散于正负极和隔膜之间的凝胶电解质。电化学测试表明，凝胶型电池具有和液态电池可比的容量和循环稳定性。差示扫描量热(DSC)测试表明，相对于液态电解质，凝胶电解质与钴酸锂正极和石墨负极之间的热稳定性更好。热板和加速量热(ARC)试验表明，凝胶电池具有更好的安全性能。采用原位聚合法制作了超薄软包电池，该电池显示出较好的柔性，经折叠和剪切试验后该电池仍可正常工作。

关键词: 锂二次电池, 凝胶电解质, 聚季戊四醇三丙烯酸酯, 原位聚合, 钴酸锂

Abstract:

Pouch-type gel Li-ion batteries were fabricated by in-situ polymerization and constructed from a LiCoO₂ cathode, a graphite anode, a ceramics-coated polyethylene separator, and a gel electrolyte that was dispersed in between. Electrochemical tests showed that the battery using the gel electrolyte exhibited comparable capacity and cycling stability compared with that using the liquid electrolyte. The differential scanning calorimeter tests indicated that the gel electrolyte exhibited an improved thermal stability toward LiCoO₂ and graphite than the liquid electrolyte. The hot-plate and accelerating rate calorimetry tests suggested that the safety property of the battery can be enhanced using gel electrolytes instead of liquid electrolytes. An ultrathin pouch battery was also fabricated by in-situ polymerization, and it showed good flexibility and can still operate after folding and cutting.

Key words: lithium secondary batteries, gel electrolytes, poly(pentaerythritol triacrylate), in-situ polymerization, LiCoO₂

中图分类号:

TM 911

涂健, 徐雄文, 胡海波, 聂阳, 曾涛, 孙秋实, 成浩, 谢健, 赵新兵. 凝胶型锂离子电池的制作及电化学和安全性能[J]. 储能科学与技术, 2021, 10(3): 1025-1031.

Jian TU, Xiongwen XU, Haibo HU, Yang NIE, Tao ZENG, Qiushi SUN, Hao CHENG, Jian XIE, Xinbing ZHAO. Fabrication of gel-type Li-ion batteries and their electrochemical and safety properties[J]. Energy Storage Science and Technology, 2021, 10(3): 1025-1031.

图/表 6

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凝胶型锂离子电池的制作及电化学和安全性能

Fabrication of gel-type Li-ion batteries and their electrochemical and safety properties

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