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Invention Publication
CN102569877A 锂二次电池、正极活性物质、正极、电动工具及电动车辆 有权 转让

锂二次电池、正极活性物质、正极、电动工具及电动车辆
Abstract:
本发明提供了锂二次电池、正极活性物质、正极、电动工具及电动车辆。所述锂二次电池包含正极、负极和电解质溶液。所述正极包含正极活性物质，所述正极活性物质包含并入到复合氧化物的表面层区域的晶体结构中的元素M2，所述氧化物包含元素M1且由下式(1)表示：Li1+a(MnbCocNi1-b-c)1-aM1dO2-e(1)，M2与M1不同。所述元素M2是选自由镁Mg、钙Ca、钛Ti、锆Zr、硫S、氟F、铁Fe、铜Cu、硼B、铝Al、磷P、碳C、锰Mn、镍Ni和钴Co组成的组中的至少一种，M1是铝、镁、锆、钛、钡Ba、硼、硅Si和铁中的至少一种，a满足0＜a＜0.25，b满足0.5≤b＜0.7，c满足0≤c＜1-b，d满足0.01≤d≤0.2，且e满足0≤e≤1。
Abstract(English):

The present invention provides a lithium secondary battery, a positive electrode active material, a positive electrode, an electric tool and an electric vehicle. A lithium secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. The positive electrode contains a positive electrode active material including element M2 incorporated in a crystal structure in a surface layer area of a complex oxide, the oxide including the element M1 and being represented by the following formula (1),Li1+a(MnbCocNi1-b-c)1-aM1dO2-e(1), M2 being different from M1. The element M2 is at least one kind selected from the group consisting of magnesium (Mg), calcium (Ca), titanium (Ti), zirconium (Zr), sulfur (S), fluorine (F), iron (Fe), copper (Cu), boron (B), aluminum (Al), phosphorus (P), carbon (C), manganese (Mn), nickel (Ni), and cobalt (Co). M1 is at least one kind of aluminum, magnesium, zirconium, titanium, barium Ba, boron, silicon Si, and iron, a satisfies 0

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