陶瓷隔膜对于LiNi0.8Co0.15Al0.05O2动力锂离子电池性能的影响

doi:10.12028/j.issn.2095-4239.2018.0218

储能科学与技术 ›› 2019, Vol. 8 ›› Issue (2): 297-303.doi: 10.12028/j.issn.2095-4239.2018.0218

陶瓷隔膜对于LiNi_0.8Co_0.15Al_0.05O₂动力锂离子电池性能的影响

高蕾, 程广玉, 顾洪汇, 王可

空间电源技术国家重点实验室, 上海空间电源研究所, 上海 200245

收稿日期:2018-10-30 修回日期:2018-11-27 出版日期:2019-03-01 发布日期:2018-11-28
作者简介:高蕾(1976-),女,硕士,上海空间电源研究所,高级工程师,主要研究方向为锂离子电池,E-mail:59637669@qq.com

Influence of ceramic separator on the LiNi_0.8Co_0.15Al_0.05O₂ high power Li-ion battery performance

GAO Lei, CHENG Guangyu, GU Honghui, WANG Ke

State Key Laboratory of Space Power Technology, Shanghai Institute of Space Power Sources, Shanghai 200245, China

Received:2018-10-30 Revised:2018-11-27 Online:2019-03-01 Published:2018-11-28

摘要/Abstract

摘要： 本文以普通聚烯烃隔膜作为对比，研究了不同工艺的聚烯烃基膜制作的陶瓷隔膜对于LiNi_0.8Co_0.15Al_0.05O₂动力锂离子电池性能的影响。表征了三种隔膜的本征性能，包括微孔形貌、透气度和离子电导率。干法基膜陶瓷隔膜、湿法基膜陶瓷隔膜和普通聚烯烃隔膜的透气度值分别为165 sec/100 mL、200 sec/100 mL和520 sec/100 mL；离子电导率分别为0.952 mS/cm²、0.703 mS/cm²和0.622mS/cm²。分别采用三种隔膜制作了容量为2 A·h的软包装电池，评估了电池的倍率性能、循环寿命以及荷电保持能力。结果发现，与普通聚烯烃隔膜相比，陶瓷隔膜可以提高电池的功率性能，并且干法聚烯烃基膜制作的陶瓷隔膜，其倍率增效作用较湿法基膜的陶瓷隔膜明显，尤其当放电倍率达到电池的设计极限时，干法聚烯烃基膜制作的陶瓷隔膜对于电池倍率性能的增效作用更加显著。

关键词: 陶瓷隔膜, 高功率, 锂离子电池, 透气度

Abstract: Influence of ceramic separators with different base film on the performance of LiNi_0.8Co_0.15Al_0.05O₂ high power battery is researched, with conventional polyolefin separator as control experiment. The intrinsic performance of these three kinds of separators including micro-morphology, gurley number, and ion conductivity are investigated. For dry process base film ceramic separator, wet process base film ceramic separator and polyolefin separator, the air permeability are 165sec/100cc, 200sec/100cc and 520sec/100cc, respectively. The ion conductivity are 0.952 mS/cm², 0.703 mS/cm², and 0.622 mS/cm². Pouch cells of 2 A·h were prepared with three kinds of separators. Rate performance, cycle and capacity retention were tested. The results exhibit that the ceramic separator can improve voltage plateau compared with polyolefin separator, and the role of dry process base film ceramic separator in improving cell power performance is more evident than the wet process base film ceramic separator, especially when the discharge rate is increased to a margin level of the cell design.

Key words: ceramic separator, high power, Li-ion battery, air permeability

中图分类号:

TM912.9

高蕾, 程广玉, 顾洪汇, 王可. 陶瓷隔膜对于LiNi_0.8Co_0.15Al_0.05O₂动力锂离子电池性能的影响[J]. 储能科学与技术, 2019, 8(2): 297-303.

GAO Lei, CHENG Guangyu, GU Honghui, WANG Ke. Influence of ceramic separator on the LiNi_0.8Co_0.15Al_0.05O₂ high power Li-ion battery performance[J]. Energy Storage Science and Technology, 2019, 8(2): 297-303.

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陶瓷隔膜对于LiNi_0.8Co_0.15Al_0.05O₂动力锂离子电池性能的影响

Influence of ceramic separator on the LiNi_0.8Co_0.15Al_0.05O₂ high power Li-ion battery performance

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