Lithium metal fluorophosphate materials and preparation thereof
    81.
    发明授权
    Lithium metal fluorophosphate materials and preparation thereof 有权
    锂金属氟磷酸盐材料及其制备

    公开(公告)号:US06387568B1

    公开(公告)日:2002-05-14

    申请号:US09559861

    申请日:2000-04-27

    Abstract: The invention provides new and novel lithium-metal-fluorophosphates which, upon electrochemical interaction, release lithium ions, and are capable of reversibly cycling lithium ions. The invention provides a rechargeable lithium battery which comprises an electrode formed from the novel lithium-metal-fluorophosphates. The lithium-metal-fluorophosphates comprise lithium and at least one other metal besides lithium.

    Abstract translation: 本发明提供了新的和新型的锂 - 金属 - 氟磷酸盐,其在电化学相互作用时释放锂离子,并且能够可逆地循环锂离子。 本发明提供一种可充电锂电池,其包括由新型锂金属 - 氟磷酸盐形成的电极。 除了锂之外,锂金属 - 氟磷酸盐还包含锂和至少一种其它金属。

    Stabilized electrochemical cell
    83.
    发明授权
    Stabilized electrochemical cell 失效
    稳定电化学电池

    公开(公告)号:US5869207A

    公开(公告)日:1999-02-09

    申请号:US762081

    申请日:1996-12-09

    Abstract: 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, for the first time, effectively overcomes problems which arise between the interaction of cell components and contaminate water retained in a cell. Such contaminate water reacts with the electrolyte which comprises a salt of lithium in a solvent. Solubilizing of the salt in solution with attendant interaction between the salt and water causes formation of hydrogen-containing acids. The method of the invention effectively blocks decomposition of a lithium metal oxide cathode active material, and particularly lithium manganese oxide (LMO, nominally LiMn.sub.2 O.sub.4). 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 thereby 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.

    Abstract translation: 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。 本发明的方法第一次有效地克服了细胞成分的相互作用和污染细胞中残留的水之间产生的问题。 这种污染水与包含锂在溶剂中的盐的电解质反应。 溶解盐中的盐与盐和水之间伴随的相互作用引起含氢酸的形成。 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酸反应从而中和酸的至少一部分,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。

    Lithium ion electrochemical cell
    88.
    发明授权
    Lithium ion electrochemical cell 失效
    锂离子电化学电池

    公开(公告)号:US5660948A

    公开(公告)日:1997-08-26

    申请号:US533882

    申请日:1995-09-26

    Applicant: Jeremy Barker

    Inventor: Jeremy Barker

    Abstract: Non-aqueous electrochemical cells with improved performance can be fabricated by employing anodes comprising a composition having graphite particles that have a BET method specific surface area of about 6 to about 12 m.sup.2 /g and a crystallite height L.sub.c of about 100 nm to about 120 nm, and wherein at least 90% (wt) of the graphite particles are less than 16 .mu.m in size; a cathode; and a non-aqueous electrolyte containing a solvent and salt that is interposed between the anode and cathode. When employed in an electrochemical cell, the anode can attain a specific electrode capacity of at least 300 mAhr/g. The electrochemical cell has a cycle life of greater than 1500 cycles, and has a first cycle capacity loss of only about 10% to about 15%.

    Abstract translation: 具有改进性能的非水电化学电池可以通过使用包含具有BET法比表面积为约6至约12m 2 / g的石墨颗粒和约100nm至约120nm的微晶高度Lc的组合物的阳极来制造 ,并且其中至少90%(重量)的石墨颗粒的尺寸小于16μm; 阴极 和含有介于阳极和阴极之间的溶剂和盐的非水电解质。 当用于电化学电池中时,阳极可达到至少300mAhr / g的特定电极容量。 电化学电池具有大于1500个循环的循环寿命,并且具有仅约10%至约15%的第一循环容量损失。

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