Lithium secondary batteries
Lithium secondary batteries
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发表时间：
2011-05
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影响因子：
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通讯作者：
홍지준;황인범;고성태;허윤정
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作者：
홍지준;황인범;고성태;허윤정
目得：本发明提供一种锂二次电池，其通过同时使用分别涂覆有特定材料的电极活性材料和隔膜来使与电解质的分解反应最小化。组成：一种锂二次电池，包括正极、负极和插入正极和负极之间的隔膜。隔膜是具有芳族聚酰胺涂层的聚烯烃多孔膜。正极包括正极活性材料，该正极活性材料是包含橄榄石型磷酸铁锂涂层的锂金属氧化物，或者负极包括负极活性材料，该负极活性材料是包含尖晶石型锂钛氧化物涂层的碳材料。聚烯烃多孔膜的厚度为10-30微米，芳纶涂层的厚度为2-10微米。
PURPOSE: A lithium secondary battery is provided to minimize decomposition reaction with electrolyte by simultaneously using an electrode active material and a separator which are coated with specific materials respectively. CONSTITUTION: A lithium secondary battery comprises a positive electrode, a negative electrode, and a separator inserted between the positive electrode and negative electrode. The separator is a polyolefin porous membrane with an aramid coating layer. The positive electrode comprises a positive electrode active material which is a lithium metal oxide comprising an olivine type iron lithium phosphate coating layer or the negative electrode comprises a negative electrode active material which is a carbon material comprising a spinel type lithium titanium oxide coating layer. The thickness of the polyolefin porous film is 10-30 micron and the thickness of the aramid coating layer is 2-10 micron.