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
4秒前
哈哈完成签到,获得积分10
7秒前
8秒前
善学以致用应助D_采纳,获得10
10秒前
风清扬应助社科狗采纳,获得50
10秒前
科研通AI5应助李天王采纳,获得20
11秒前
11秒前
kingking完成签到,获得积分10
13秒前
丘比特应助SSS水鱼采纳,获得10
13秒前
13秒前
13秒前
ll完成签到,获得积分10
14秒前
风味烤羊腿完成签到,获得积分0
15秒前
15秒前
baibai完成签到,获得积分10
16秒前
猪猪hero应助魏开铭采纳,获得10
17秒前
大模型应助一只奇怪的鸟采纳,获得10
17秒前
18秒前
lyh发布了新的文献求助10
18秒前
20秒前
李健应助科研通管家采纳,获得10
20秒前
20秒前
wanci应助科研通管家采纳,获得10
21秒前
852应助科研通管家采纳,获得10
21秒前
ll应助科研通管家采纳,获得10
21秒前
21秒前
21秒前
21秒前
21秒前
小麻花完成签到,获得积分10
21秒前
量子星尘发布了新的文献求助10
22秒前
humble完成签到 ,获得积分10
22秒前
木子木完成签到,获得积分10
23秒前
24秒前
Wind发布了新的文献求助10
24秒前
和谐的映梦完成签到,获得积分10
24秒前
彼岸花完成签到,获得积分10
25秒前
26秒前
迟迟完成签到,获得积分10
27秒前
澡雪发布了新的文献求助10
29秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
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
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
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 3975516
求助须知:如何正确求助?哪些是违规求助? 3519930
关于积分的说明 11200130
捐赠科研通 3256278
什么是DOI,文献DOI怎么找? 1798183
邀请新用户注册赠送积分活动 877425
科研通“疑难数据库(出版商)”最低求助积分说明 806320