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    • 1. 发明授权
    • Secondary battery
    • 二次电池
    • US5468571A
    • 1995-11-21
    • US412230
    • 1995-03-27
    • Masahisa FujimotoKoji NishioToshihiko Saito
    • Masahisa FujimotoKoji NishioToshihiko Saito
    • H01M4/133H01M4/1393H01M4/58H01M4/583H01M4/62H01M10/05
    • H01M4/587H01M4/621H01M4/622
    • Provided is a secondary battery with a negative electrode comprising a carbon powder capable of occluding and discharging cations, particles constituting the powder being consolidated with a binder, the binder consisting essentially of a polyimide or polyvinyl formal resin. In this battery, carbon particles are sufficiently consolidated and, are also adhered firmly to the negative electrode collector metal so that they hardly peel off from the negative electrode. As a result, the battery hardly decreases its capacity even when charge-discharge cycles are repeatedly run, thereby having a long cycle life. Furthermore, since the binder for the negative electrode comprises PI or PVF, containing no fluorine, there is little danger of the battery bursting or breaking even when the battery temperature becomes abnormally high, whereby the battery has high reliability.
    • 本发明提供一种具有负极的二次电池,该负极包含能够吸收和排出阳离子的碳粉末,构成粉末的颗粒被粘合剂固结,所述粘合剂基本上由聚酰亚胺或聚乙烯醇缩甲醛树脂组成。 在该电池中,碳粒子被充分固结,并且也牢固地粘附到负极集电体金属,使得它们几乎不从负极剥离。 结果,即使当充放电循环重复地运行时,电池几乎也不会降低其容量,从而具有长的循环寿命。 此外,由于负极用粘合剂包含不含氟的PI或PVF,即使电池温度异常高,也不会发生电池爆裂或断裂的危险,电池具有高可靠性。
    • 8. 发明授权
    • Secondary battery
    • 二次电池
    • US5352548A
    • 1994-10-04
    • US85631
    • 1993-06-30
    • Masahisa FujimotoMasatoshi TakahashiKoji Nishio
    • Masahisa FujimotoMasatoshi TakahashiKoji Nishio
    • H01M4/587H01M10/05H01M10/0569H01M6/16H01M4/58
    • H01M10/0569
    • A secondary battery is comprised of a positive electrode, a negative electrode formed from a carbon composition intercalating lithium reversibly and a non-aqueous electrolyte. The non-aqueous electrolyte includes a lithium salt and a mixture of a low boiling point solvent having the boiling point of 150.degree. C. or lower and an organic solvent of vinylene carbonate or its derivative. The negative electrode may comprise a graphite, and the positive electrode may comprise a material being selected from a group consisting of metal chalcogen and metal oxide, such as V.sub.2 O.sub.5, TiS.sub.2, MoS.sub.2, LiCoO.sub.2, LiMnO.sub.2, LiNiO.sub.2, LiCrO.sub.2, LiMn.sub.2 O.sub.4 and LiFeO.sub.2. The low boiling point solvent may be selected from a group consisting of dimethyl carbonate, diethyl carbonate, 1,2-dimethoxy ethane, 1,2-diethoxy ethane and ethoxymethoxy ethane. The derivative may be provided by replacing at least one of two hydrogen atoms of the vinylene carbonate with one selected from a group consisting of a methyl group, an ethyl group and one halogen atom.
    • 二次电池由正电极,由可逆锂嵌入的碳组合物形成的负极和非水电解质构成。 非水电解质包括锂盐和沸点为150℃以下的低沸点溶剂与碳酸亚乙烯酯或其衍生物的有机溶剂的混合物。 负极可以包括石墨,正极可以包括选自金属硫族元素和金属氧化物如V2O5,TiS2,MoS2,LiCoO2,LiMnO2,LiNiO2,LiCrO2,LiMn2O4和LiFeO2的材料。 低沸点溶剂可以选自碳酸二甲酯,碳酸二乙酯,1,2-二甲氧基乙烷,1,2-二乙氧基乙烷和乙氧基甲氧基乙烷。 可以通过将碳酸亚乙烯酯的两个氢原子中的至少一个替换为选自甲基,乙基和一个卤素原子的一个来提供。