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发明授权
CN101154755B 非水电解质二次电池 有权

非水电解质二次电池
摘要：
本发明涉及一种非水电解质二次电池，在满充电状态下的正极活性物质的电位以金属锂为基准为4.4～4.6V，并且在该电位的正极活性物质中的Li含量为初期状态的40％以下，该非水电解质二次电池能够得到良好的循环特性和充放电特性。在具有包含正极活性物质的正极、包含负极活性物质的负极和非水电解质的非水电解质二次电池中，在满充电状态下的正极活性物质的电位以金属锂为基准为4.4～4.6V，并且在该电位的正极活性物质中的Li含量为初期状态的40％以下，在非水电解质中含有如下所示的结构式1表示的碳酸亚乙酯衍生物，式中X和Y中的至少一个为卤素。结构式1
摘要（英）：

A nonaqueous electrolyte secondary battery is obtained in which a potential of a positive-electrode active material in a fully charged condition is 4.4-4.6 V versus metallic lithium and an Li content of the positive-electrode active material at the potential does not exceed 40% of an initial Li content, and which can show improved cycle characteristics and charge-discharge characteristics. The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive-electrode active material, a negative electrode containing a negative-electrode active material, and a nonaqueous electrolyte, wherein a potential of the positive electrode active material in a fully charged condition is 4.4-4.6 V versus metallic lithium, an Li content of the Positive-electrode active material at the potential does not exceed 40% of the initial Li content, and the nonaqueous electrolyte contains an ethylene carbonate derivative represented by the following structural formula 1 wherein atleast one of X and Y is a halogen.

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