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    • 2. 发明专利
    • Negative electrode for lithium secondary battery, and lithium secondary cell
    • 用于锂二次电池和锂二次电池的负极
    • JP2008235083A
    • 2008-10-02
    • JP2007075039
    • 2007-03-22
    • Sanyo Electric Co Ltd三洋電機株式会社
    • TAKANO YASUOSUNANO TAIZOSAWA KATSUICHIROJINNO MARUO
    • H01M4/134H01M4/38H01M4/62
    • Y02E60/122
    • PROBLEM TO BE SOLVED: To obtain a lithium secondary battery negative electrode that is the lithium secondary battery negative electrode which has a superior cycle characteristic and in which active material particles containing silicon alloy are used, and a lithium secondary battery using it. SOLUTION: The lithium secondary battery negative electrode is obtained, in which an active material layer containing a binder and the active material particles containing silicon alloy composed of silicon and at least one kind of metal element are arranged on a surface of a current collector consisting of a conductive metal foil, then this is sintered under a non-oxidizing atmosphere, and in which the active material particles have a first phase 2 composed of the alloy of silicon and the metal element and a second phase 1 composed mainly of silicon, while the first phase 2 has a three-dimensional mesh structure in the active material particles, and the second phase 1 is enveloped in the first phase 2. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了获得使用具有优越的循环特性的锂二次电池负极并且其中使用含有硅合金的活性材料颗粒的锂二次电池负极和使用它的锂二次电池。 解决方案:获得锂二次电池负极,其中包含粘合剂的活性材料层和由硅和至少一种金属元素组成的硅合金的活性材料颗粒被布置在电流的表面上 收集器由导电金属箔构成,然后在非氧化性气氛下烧结,其中活性物质颗粒具有由硅和金属元素的合金组成的第一相2和主要由硅构成的第二相1 而第一相2在活性物质颗粒中具有三维网格结构,第二相1在第一阶段2中被包围。版权所有:(C)2009,JPO&INPIT
    • 6. 发明专利
    • Lithium secondary battery and its manufacturing method
    • 锂二次电池及其制造方法
    • JP2005268120A
    • 2005-09-29
    • JP2004080750
    • 2004-03-19
    • Sanyo Electric Co Ltd三洋電機株式会社
    • ITAYA SHOJIFUKUI ATSUSHIKUSUMOTO YASUYUKIMINAMI HIROYUKITORIMAE MARIKOSAWA KATSUICHIROFUJIMOTO MASAHISA
    • H01M4/66H01M4/134H01M4/1395H01M4/38H01M4/62H01M10/05H01M4/02H01M4/04H01M10/40
    • Y02P70/54
    • PROBLEM TO BE SOLVED: To provide a lithium secondary battery with excellent charging/discharging cycle property using a negative electrode wherein initial charge/discharge efficiency of a negative electrode provided with a negative electrode active material containing silicon is improved.
      SOLUTION: The lithium secondary battery 10 of this invention has the negative electrode 12 wherein a negative electrode mix layer having a negative electrode active material containing silicon and a binder is formed on a conductive metal foil as a negative electrode current collector, a positive electrode 11 and a nonaqueous electrolyte. A binder solution wherein the contact angle of a solution containing a binder and a silicon wafer at in 20 °C is less than 10.6 degrees is used. Silicon used as the negative electrode active material is equivalent to the crushed silicon wafer. Since the wettability of the binder and the negative electrode active material particles is good when the binder solution is used, high adhesion between negative electrode active material particles and the binder can be obtained, a good conduction network can be formed in the negative electrode mix layer, and the negative electrode 12 with excellent charge-discharge characteristics can be obtained.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种具有优异的充电/放电循环特性的锂二次电池,其使用负极,其中提供含有含硅的负极活性物质的负极的初始充电/放电效率提高。 解决方案本发明的锂二次电池10具有负极12,其中在作为负极集电体的导电金属箔上形成具有含有硅和粘合剂的负极活性物质的负极混合层, 正极11和非水电解质。 使用其中在20℃下含有粘合剂和硅晶片的溶液的接触角小于10.6度的粘合剂溶液。 用作负极活性物质的硅相当于破碎的硅晶片。 由于粘合剂和负极活性物质粒子的润湿性在使用粘合剂溶液时是良好的,因此可以获得负极活性物质粒子和粘合剂之间的高附着性,可以在负极混合层中形成良好的导电网络 并且可以获得具有优异的充放电特性的负电极12。 版权所有(C)2005,JPO&NCIPI