2022-11-03
锂电(dian)(dian)池(chi)(chi)陶(tao)(tao)瓷(ci)隔(ge)膜(mo)(mo)采用陶(tao)(tao)瓷(ci)颗(ke)粒包(bao)覆,即以(yi)(yi)PP、PE或多层(ceng)复合(he)隔(ge)膜(mo)(mo)为基体,表面(mian)(mian)包(bao)覆一层(ceng)Al203、SiO2、Mg (OH)2或其他(ta)优异的(de)(de)耐热性无(wu)机陶(tao)(tao)瓷(ci)颗(ke)粒经特殊工艺处理后与(yu)基材紧密结合(he),使(shi)有机物的(de)(de)柔韧性和(he)(he)无(wu)机物的(de)(de)热稳定性稳定结合(he),提高(gao)隔(ge)膜(mo)(mo)的(de)(de)耐高(gao)温性、耐热收缩性和(he)(he)穿刺强度,进而提高(gao)电(dian)(dian)池(chi)(chi)的(de)(de)安全(quan)性能。据(ju)了解(jie),陶(tao)(tao)瓷(ci)复合(he)层(ceng)一方面(mian)(mian)可以(yi)(yi)解(jie)决PP、PE隔(ge)膜(mo)(mo)热收缩导致(zhi)的(de)(de)热失控导致(zhi)电(dian)(dian)池(chi)(chi)燃烧爆(bao)炸的(de)(de)安全(quan)问题; 另一方面(mian)(mian),陶(tao)(tao)瓷(ci)复合(he)隔(ge)膜(mo)(mo)与(yu)电(dian)(dian)解(jie)液、正(zheng)负电(dian)(dian)极材料具有良(liang)好的(de)(de)浸润性。吸(xi)收液体和(he)(he)保留液体的(de)(de)能力大大提高(gao)了锂电(dian)(dian)池(chi)(chi)的(de)(de)使(shi)用寿命。此外,陶(tao)(tao)瓷(ci)涂层(ceng)隔(ge)板还可以(yi)(yi)中(zhong)和(he)(he)电(dian)(dian)解(jie)质(zhi)中(zhong)的(de)(de)少量(liang)氢氟酸,以(yi)(yi)防止(zhi)电(dian)(dian)池(chi)(chi)膨胀。
氧化铝用(yong)锂(li)电池陶瓷隔膜的性(xing)能要求:
1,粒径均匀,可以(yi)很好地粘合到膜(mo)片上,而不会(hui)阻塞膜(mo)片孔。
2,氧化铝纯(chun)度高,不能引入杂(za)质,影响电池的内部环境。
3,氧化铝(lv)晶体结构的(de)要(yao)求,保证了(le)氧化铝(lv)与(yu)电解(jie)质的(de)相(xiang)容(rong)性和润湿性。
涂层(ceng)高纯度氧化(hua)锯 (VK-L30G) 隔膜的(de)优点:
1、耐高温:
氧化铝涂层具有优异的耐高温性,可以(yi)保持180摄氏度(du)以(yi)上的隔膜形态。
2、高安全性:
氧(yang)化铝涂(tu)层(ceng)可以中(zhong)和电(dian)(dian)解液(ye)中(zhong)的自由场,提(ti)高(gao)电(dian)(dian)池的耐酸性(xing),提(ti)高(gao)安全性(xing)。
3、高速率性能:
纳米氧(yang)化铝可以在粘(zhan)结电池(chi)中形成(cheng)固溶体(ti),提高倍率(lv)和(he)循环(huan)性能(neng)。
4、良好的润湿性:
纳米氧化(hua)铝(lv)粉末具有良好的液体(ti)吸收(shou)和保留能力(li)。
5、独特的自关机特性:
保持(chi)聚烯烃隔膜的闭孔特(te)性,以避免热失控(kong)引起(qi)的安全(quan)迹象。
6、低自放电率:
氧(yang)化铝涂层增加了微孔的曲折(zhe)程度,自放电比普通隔(ge)膜(mo)低。
7、长循环寿命:
减少(shao)了(le)循环过程中的机械微(wei)短路,有(you)效提(ti)高了(le)循环寿命。
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