摘要
采用国产具有不同孔隙率的聚丙烯微孔隔膜,探讨了其微观结构、收缩率、抗穿刺能力、电解液吸附能力与室温电导率之间的关系。结果表明:孔隙率太小,透气性能差,电解液吸附能力弱,电导率低;孔隙率为50%时,虽然透气性能和电解液吸附能力明显改善,但对应的收缩率和抗穿刺能力变差,电导率反而变低,因此,对于常用的聚丙烯微孔隔膜而言,孔隙率在45%左右比较合适。
The relationship between microstructure,shrinkage,puncture-resistant ability,electrolyte absorption and room temperature conductivity was studied for PP microporous membrane with different porosity.The results show that：when the porosity of PP microporous membrane is low,the air permeability is poor,the electrolyte absorption is weak,the conductivity is low;when the porosity of PP microporous membrane is 50%,the air permeability and electrolyte absorption are improved obviously,but the shrinkage and puncture-resistant ability decrease,and the conductivity becomes lower;the porosity of 45% is appropriate for PP microporous membrane used as normal battery separator.
出处
《塑料科技》
CAS
北大核心
2010年第2期45-47,共3页
Plastics Science and Technology
关键词
聚丙烯
孔隙率
微孔隔膜
Polypropylene
Porosity
Microporous membrane
