Volume 3,Issue 5
PEI/PAA 层层自组装改性聚丙烯电池隔膜的制备及性能研究
针对聚丙烯（PP）电池隔膜因润湿性差而影响充放电性能的问题，本文以聚乙烯亚胺（PEI）和聚丙烯酸（PAA）为聚电解质，对经等离子体预处理的PP隔膜进行层层自组装改性。采用扫描电镜、红外光谱及充放电循环测试对隔膜进行表征。结果显示：组装三层聚电解质后，隔膜对电解液的润湿能力大幅改善，接触角从原始PP的80.0±1.3°降至20.9±1.3° ；改性隔膜在1 C下循环500次后容量保持率为93.3%，远高于原始PP 的71.6%，证明改性有效提升了电池的循环稳定性。
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