常压等离子体化学气相沉积制备UHMWPE/SiO_xC_yH_z锂离子杂化隔膜  

Preparation of UHMWPE/SiO_xC_yH_z Hybrid Membrane for Lithium Ion Battery by Atmospheric Pressure PECVD

作　　者：王超梁[1] 彭释 戴协 石建军[1] 张菁[1] 

机构地区：[1]东华大学理学院,上海201620 [2]东华大学纺织学院,上海201620 [3]东华大学材料科学与工程学院,上海201620

出　　处：《东华大学学报（自然科学版）》2016年第2期179-184,共6页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金资助项目(11375042)

摘　　要：采用常压等离子体化学气相沉积(APECVD)方法裂解六甲基二硅氧烷(HMDSO),在高强高模聚乙烯(UHMWPE)隔膜表面进行沉积,形成双面微纳米颗粒膜涂覆的UHMWPE/SiO_xC_yH_z杂化隔膜,并分别通过扫描电子显微镜(SEM)、衰减全反射傅里叶变换红外光谱(ATR-FTIR)、热性能测试方法等,研究了不同O2/HMDSO流量比对杂化隔膜结构与热性能的影响.研究结果表明,沉积薄膜为具有一定结晶特性的SiO_xC_yH_z微纳米颗粒薄膜,具有较好的多孔特性及与UHMWPE隔膜纤维的黏结.随着O2/HMDSO流量比的增加,在颗粒薄膜的亲水性、透气率及对隔膜的覆盖率提高的同时,明显地改善了杂化隔膜的耐热收缩性能,120℃下热处理30 min,热收缩率仅为2%左右,在具有较高耐热性要求的锂离子动力电池隔膜方面具有很好的应用前景.A hybrid ultra high molecular weight polyethylene（UHMWPE）membrane with both sides coated by SiO_xC_yH_zporous nanoparticulate film was successfully obtained through atmospheric-pressure plasma enhanced chemical vapor deposition（APECVD）of Ar/O_2/HMDSO.The morphology and structure of the hybrid membrane prepared at different O_2/HMDSO flow rate ratio were studied by scanning electron microscope（SEM）observation,attenuated total reflection Fourier transform infrared（ATR-FTIR）spectrum measurement and thermal performance test methods.It is found that the deposited porous fibrous SiO_xC_yH_z granular film contains partly-crystallized SiOx nanoparticles.With increased flow rate ratio of O_2/HMDSO,hydrophilicity,permeability and the coverage of the film increased.At the same time,the thermal contraction of the hybrid membrane can be reduced to about2% when keeping it at 120℃for 30 minutes,showing agood application potential for lithium ion power battery separator.

关 键 词：常压等离子体化学气相沉积(APECVD) SiOxCyHz多孔纳米颗粒薄膜 高强高模聚乙烯(UHMWPE) 锂离子电池隔膜 热收缩 

分 类 号：O539[理学—等离子体物理]