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    • 7. 发明申请
    • PRODUCTION PROCESS FOR COMPOSITE OXIDE, POSITIVE-ELECTRODE ACTIVE MATERIAL FOR LITHIUM-ION SECONDARY BATTERY AND LITHIUM-ION SECONDARY BATTERY
    • 用于锂离子二次电池和锂离子二次电池的复合氧化物,正电极活性材料的生产工艺
    • US20120282526A1
    • 2012-11-08
    • US13519077
    • 2010-12-20
    • Naoto YasudaRyota Isomura
    • Naoto YasudaRyota Isomura
    • H01M4/505
    • H01M4/505B82Y30/00C01G45/1228C01G45/1257C01G51/42C01G51/50C01G53/50C01P2002/52C01P2002/72C01P2002/77C01P2004/64C01P2004/80C01P2006/40H01M10/052H01M10/0568Y02E60/122Y02P70/54
    • A composite oxide, whose major component is a lithium-manganese-system oxide including Li and tetravalent Mn at least and having a crystal structure that belongs to a layered rock-salt structure, is produced via the following: a raw-material mixture preparation step of preparing a raw-material mixture by mixing a metallic-compound raw material and a molten-salt raw material with each other, the metallic-compound raw material at least including one or more kinds of metallic compounds being selected from the group consisting of oxides, hydroxides and metallic salts that include one or more kinds of metallic elements in which Mn is essential, the molten-salt raw material including lithium hydroxide and lithium nitrate, and exhibiting a proportion of the lithium hydroxide with respect to the lithium nitrate (i.e., (Lithium Hydroxide)/(Lithium Nitrate)) that falls in a range of from 1 or more to 10 or less by molar ratio; a molten reaction step of reacting said raw-material mixture at a melting point of said molten-salt raw material or more by melting it: and a recovery step of recovering said composite oxide being generated from said raw-material mixture that has undergone the reaction.
    • 通过以下方式制造其主要成分是包含Li和至少具有属于层状岩盐结构的晶体结构的四价Mn的锂 - 锰系氧化物的复合氧化物,原料混合物制备工序 通过将金属化合物原料和熔融盐原料混合而制备原料混合物,所述金属化合物原料至少包含一种或多种选自氧化物的金属化合物 包括其中Mn为必需的一种或多种金属元素的氢氧化物和金属盐,包括氢氧化锂和硝酸锂的熔融盐原料,并且显示相对于硝酸锂的一部分氢氧化锂(即, (氢氧化锂)/(硝酸锂)),其摩尔比为1以上10以下的范围; 熔融反应步骤,使所述原料混合物在所述熔融盐原料的熔点以上进行熔融反应;和从所述原料混合物中反应生成的复合氧化物的回收步骤, 。
    • 9. 发明申请
    • LITHIUM-ION SECONDARY BATTERY
    • 锂离子二次电池
    • US20120321955A1
    • 2012-12-20
    • US13581355
    • 2011-04-01
    • Naoto YasudaToru AbeJunichi Niwa
    • Naoto YasudaToru AbeJunichi Niwa
    • H01M4/505H01M4/485H01M4/52H01M4/54
    • H01M4/505H01M4/131H01M4/386H01M4/387H01M4/525H01M4/587H01M10/052Y02T10/7011
    • A lithium-ion secondary battery is characterized in that it is equipped with: a positive electrode comprising a positive-electrode active material that includes a lithium-transition metal composite oxide including at least lithium and manganese and possessing a layered rock-salt structure; a negative electrode comprising a negative-electrode active material that includes at least one kind of carbon-based materials, silicon-based materials, and tin-based materials; and a non-aqueous electrolytic solution, wherein: said lithium-transition metal composite oxide exhibits an irreversible capacity; and an actual capacity of said negative electrode at the time of first-round charging up to 0 V with respect to metallic lithium is smaller than an actual capacity of said positive electrode at the time of first-round charging up to 4.7 V with respect to metallic lithium. Even when an employment amount of the active materials is reduced less than those conventional amounts, the resulting battery capacity hardly declines.
    • 锂离子二次电池的特征在于,其具备:包含正极活性物质的正极,所述正极活性物质包括至少包含锂和锰的锂 - 过渡金属复合氧化物,并具有层状岩盐结构; 包含负极活性物质的负极,所述负极活性物质包含至少一种碳类材料,硅类材料和锡类材料; 和非水电解液,其中:所述锂 - 过渡金属复合氧化物具有不可逆容量; 并且相对于金属锂在第一次充电至0V时的所述负极的实际容量小于相对于第一次充电高达4.7V时的所述正极的实际容量 金属锂。 即使活性物质的使用量比常规量减少,所得电池容量几乎不下降。