A newly-developed heat-resistance polyimide microsphere coating to enhance the thermal stability of commercial polyolefin separators for advanced lithium-ion battery

分离器(采油) 材料科学 复合数 热稳定性 电池(电) 复合材料 涂层 锂离子电池 聚丙烯 聚烯烃 陶瓷 化学工程 工程类 图层(电子) 功率(物理) 物理 热力学 量子力学
作者
Junfeng Yu,Nanxi Dong,Bingxue Liu,Guofeng Tian,Shengli Qi,Dezhen Wu
出处
期刊:Chemical Engineering Journal [Elsevier BV]
卷期号:442: 136314-136314 被引量:71
标识
DOI:10.1016/j.cej.2022.136314
摘要

Polymer separators with high-temp dimensional stability is strongly demanded for high-safety lithium-ion batteries (LIBs). In this study, a novel polyimide (PI) microsphere coating slurry was prepared and then plated on Celgard polypropylene (PP) separator, producing [email protected] microsphere composite separator with excellent thermal stability, flame retardancy, high liquid retention capacity and high ionic conductivity by a simple blade-coating process. The results show that the thermal stability and liquid retention capacity of the [email protected] microsphere composite separator are significantly improved. Compared with the pure commercial PP separator which sharply shrank at 150 °C, the PI microsphere composite separator shows negligible shrinkage over 150 °C. The obtained [email protected] microsphere composite separators exhibited excellent thermal stability and fire-resistance properties. At the same time, the peel strength of composite separator reached 138.6 N·m−1, with excellent adhesion. The surface density of [email protected] microsphere composite separator is 16.62 g·m−2, which is lower than 30.22 g·m−2 of ceramic coated composite separator. Electrochemical characterizations indicate that the discharge capacity and capacity retention rate of the battery assembled with [email protected] microsphere composite separator are significantly higher than those assembled with the pure PP separator. The half-cell assembled with this composite separator shows a high capacity of 144.3 mAh·g−1 at 5C, which is much higher than the 117.8 mAh·g−1 of the commercial PP separator equipped battery. Moreover, the lithium-ion batteries assembled with the [email protected] microsphere composite separator show excellent cycle stability after 200 cycles at 1C. More importantly, the lithium-ion battery assembled with [email protected] microsphere composite separator has excellent safety at high temperature. These features demonstrate the potential of [email protected] microspheres composite membrane as high-security separator for LIBs.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
luoziwuhui完成签到,获得积分10
刚刚
刚刚
刚刚
华仔应助落微采纳,获得10
刚刚
CyrusSo524应助焱垚采纳,获得10
刚刚
1秒前
给我个二硫碘化钾完成签到,获得积分10
1秒前
1秒前
葛怀锐完成签到 ,获得积分10
1秒前
ada完成签到,获得积分10
2秒前
tian完成签到,获得积分10
2秒前
叶子完成签到,获得积分10
2秒前
2秒前
唐若冰完成签到,获得积分10
3秒前
frx1996完成签到,获得积分20
3秒前
小二郎应助front采纳,获得10
3秒前
伶俐妙海应助忐忑的远山采纳,获得40
3秒前
科研通AI2S应助zzs喵采纳,获得10
3秒前
3秒前
whitedawn完成签到 ,获得积分10
3秒前
隐形惜筠完成签到 ,获得积分10
4秒前
姜水完成签到,获得积分10
4秒前
叶子阳完成签到 ,获得积分10
4秒前
5秒前
5秒前
5秒前
权翼完成签到,获得积分10
5秒前
Orange应助郑昕玥采纳,获得10
5秒前
耍酷曼雁发布了新的文献求助30
6秒前
sj090完成签到,获得积分10
6秒前
6秒前
SYLH应助Loik采纳,获得10
6秒前
6秒前
wuta完成签到,获得积分10
7秒前
7秒前
7秒前
等你下课发布了新的文献求助10
7秒前
chen发布了新的文献求助10
7秒前
长风破浪发布了新的文献求助10
7秒前
7秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3968844
求助须知:如何正确求助?哪些是违规求助? 3513769
关于积分的说明 11169920
捐赠科研通 3249095
什么是DOI,文献DOI怎么找? 1794630
邀请新用户注册赠送积分活动 875278
科研通“疑难数据库(出版商)”最低求助积分说明 804755