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    • 4. 发明申请
    • ADDITIVE TO STABILIZE ELECTROCHEMICAL CELL
    • 添加到稳定电化学细胞
    • WO1998026467A1
    • 1998-06-18
    • PCT/US1997021292
    • 1997-11-21
    • VALENCE TECHNOLOGY, INC.SAIDI, Mohamed-YazidGAO, FengBARKER, JeremySCORDILIS-KELLEY, Chariclea
    • VALENCE TECHNOLOGY, INC.
    • H01M10/40
    • H01M10/0567H01M4/131H01M4/133H01M4/505H01M4/62H01M10/0525Y10T29/49108
    • The present invention provides a novel composition and method for preventing decomposition of one or more electrochemical cell components comprising an electrode having an active material, and an electrolyte. The method of the invention effectively blocks decomposition of a lithium metal oxide cathode active material, and particularly lithium manganese oxide (LMO, nominally LiMn2O4). Such decomposition is prevented by including in the cell a basic compound which forms an electron donor species in the electrolyte solution; and by neutralizing at least a portion of the acid by reacting the donor species with the hydrogen containing acids whereby preventing decomposition of the lithium manganese oxide by the acid. The preservation of the lithium manganese oxide prevents degradation of other cell components by other mechanism. The basic compound is desirably an organic base, preferably a butylamine.
    • 本发明提供一种用于防止一种或多种电化学电池元件分解的新型组合物和方法,所述电化学电池组件包括具有活性材料的电极和电解质。 本发明的方法有效地阻止锂金属氧化物正极活性物质,特别是锰酸锂(LMO,名义上是LiMn 2 O 4)的分解。 通过在电解液中包含在电解质溶液中形成电子供体物质的碱性化合物来防止这种分解; 并且通过使供体物质与含氢的酸反应来中和至少一部分酸,从而防止酸分解锰酸锂。 锂锰氧化物的保存通过其他机理防止其他电池组分的降解。 碱性化合物优选为有机碱,优选为丁胺。
    • 9. 发明申请
    • CARBONACEOUS ELECTRODE AND COMPATIBLE ELECTROLYTE AND BATTERY
    • 碳酸电池和电容器和电池
    • WO1997038459A1
    • 1997-10-16
    • PCT/US1997003636
    • 1997-03-04
    • VALENCE TECHNOLOGY, INC.BARKER, JeremyGAO, Feng
    • VALENCE TECHNOLOGY, INC.
    • H01M04/58
    • H01M4/587H01M2/1613H01M2/1653H01M4/131H01M4/133H01M4/485H01M4/505H01M4/623H01M4/661H01M4/663H01M4/667H01M10/05H01M10/0525H01M10/0566H01M10/0569H01M2300/0025H01M2300/004H01M2300/0082H01M2300/0085
    • The inventions provides a battery which comprises a first electrode, a counter electrode which forms an electrochemical couple with said first electrode, and an electrolyte. The first electrode comprises graphite particles having an interlayer distance spacing of 002 planes (d002) as determined by x-ray diffraction of 0.330 to 0.340 nanometers (nm), a crystallite size in the direction of c-axis (Lc) being greater than about 90 nanometers (nm) and less than about 1000 nanometers, and at least 90 percent by weight of said graphite particles having a size less than about 24 microns ( mu m). The electrolyte comprises a solvent mixture and a solute; the solvent mixture comprises (i) ethylene carbonate (EC), and (ii) a solvent selected from the group consisting of propylene carbonate (PC), butylene carbonate (BC), and mixtures thereof with the ethylene carbonate being present in an amount by weight which is at least as great as the amount of any other solvent. Optionally, the solvent mixture further comprises one or more other organic solvents selected from the group consisting of methyl ethyl carbonate (MEC), diethyl carbonate (DEC), dipropyl carbonate (DPC), dimethyl carbonate (DMC), and mixtures thereof.
    • 本发明提供一种电池,其包括第一电极,与所述第一电极形成电化学耦合的对电极和电解质。 第一电极包括通过x射线衍射测定为0.330至0.340纳米(nm)的层间距离间隔为002平面(d002)的石墨颗粒,c轴方向上的微晶尺寸(Lc)大于约 90纳米(nm)且小于约1000纳米,并且至少90重量%的所述石墨颗粒具有小于约24微米(μm)的尺寸。 电解质包含溶剂混合物和溶质; 溶剂混合物包含(i)碳酸亚乙酯(EC)和(ii)选自碳酸亚丙酯(PC),碳酸亚丁酯(BC)及其与碳酸亚乙酯的混合物的溶剂的量以 其重量至少等于任何其它溶剂的量。 任选地,溶剂混合物还包含一种或多种选自碳酸甲乙酯(MEC),碳酸二乙酯(DEC),碳酸二丙酯(DPC),碳酸二甲酯(DMC))及其混合物的其它有机溶剂。