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
liuyuh完成签到,获得积分10
刚刚
悠明夜月完成签到 ,获得积分10
1秒前
乌云乌云快走开完成签到,获得积分10
1秒前
你是我的唯一完成签到 ,获得积分10
1秒前
洁白的故人完成签到 ,获得积分10
3秒前
乐观半兰发布了新的文献求助10
3秒前
water应助科研通管家采纳,获得10
4秒前
zhang完成签到 ,获得积分10
4秒前
water应助科研通管家采纳,获得10
4秒前
Jasper应助科研通管家采纳,获得10
4秒前
科研通AI2S应助科研通管家采纳,获得10
4秒前
orixero应助科研通管家采纳,获得10
4秒前
CodeCraft应助科研通管家采纳,获得10
4秒前
大模型应助科研通管家采纳,获得10
4秒前
4秒前
鲲鹏完成签到 ,获得积分10
5秒前
大气建辉完成签到 ,获得积分10
5秒前
尛森完成签到,获得积分10
5秒前
机灵枕头完成签到 ,获得积分10
6秒前
糖糖科研顺利呀完成签到 ,获得积分10
8秒前
辣小扬完成签到 ,获得积分10
10秒前
传奇3应助水晶茶杯采纳,获得10
12秒前
幽默的素阴完成签到 ,获得积分10
16秒前
小小鱼完成签到 ,获得积分10
23秒前
23秒前
甜美砖家完成签到 ,获得积分10
25秒前
superspace完成签到,获得积分10
26秒前
nn发布了新的文献求助10
28秒前
求助完成签到,获得积分10
29秒前
30秒前
翁雁丝完成签到 ,获得积分10
37秒前
郭义敏完成签到,获得积分0
37秒前
gyf完成签到,获得积分10
40秒前
李保龙完成签到 ,获得积分10
41秒前
45秒前
LJJ完成签到 ,获得积分10
46秒前
量子星尘发布了新的文献求助10
49秒前
阿姨洗铁路完成签到 ,获得积分10
54秒前
抹不掉的记忆完成签到,获得积分10
56秒前
56秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
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 4038112
求助须知:如何正确求助?哪些是违规求助? 3575788
关于积分的说明 11373801
捐赠科研通 3305604
什么是DOI,文献DOI怎么找? 1819255
邀请新用户注册赠送积分活动 892655
科研通“疑难数据库(出版商)”最低求助积分说明 815022