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    • 8. 发明授权
    • Battery electrode and method of making
    • 电池电极及其制作方法
    • US4556618A
    • 1985-12-03
    • US556826
    • 1983-12-01
    • George A. Shia
    • George A. Shia
    • H01M4/62H01M4/06H01M4/08H01M4/88H01M4/58
    • H01M4/8875H01M4/08H01M4/1393H01M4/8605H01M4/8668H01M4/8673H01M4/96
    • An improvement is provided for the manufacture of perhalogenated polymer, e.g., PTFE, bonded electrodes.The formulation comprises a mixture of an active material is carbon monofluoride (otherwise known as fluorinated graphite or fluorinated carbon or CF.sub.x or (C.sub.2 F).sub.n); a conductive carbon additive, such as acetylene black or graphite; and polytetrafluoroethylene (PTFE).The process comprises high shear mixing to cause the PTFE to fibrillate. The mixture is then wet with a non-polymeric pore-former to make the mixture more pliable and to create micropores in the electrode when the solution is removed by evaporation. The wet mixture is then sequentially suitably formed into a, e.g., extruded, or calendered or pressed to flatten the mixture to a thin sheet and rolled up and folded and pressed out again until a uniform sheet is obtained and the like.The resulting product affords a sheet which is relatively flexible, and stronger and allows a lower PTFE loading than has been obtained with other electrode sheet materials formed with fibrillatable polymers. The higher the PTFE content, the higher the voltage losses for the electrode.
    • 提供了用于制造全卤化聚合物例如PTFE,键合电极的改进。 该制剂包括活性物质的混合物是单氟化碳(另外称为氟化石墨或氟化碳或CF x或(C 2 F)n); 导电碳添加剂,如乙炔黑或石墨; 和聚四氟乙烯(PTFE)。 该方法包括高剪切混合以使PTFE原纤化。 然后将混合物用非聚合物成孔剂湿润以使混合物更柔韧,并且当通过蒸发除去溶液时在电极中产生微孔。 然后将湿混合物依次适当地形成为例如挤出的或压延的或压制的以使混合物平坦化成薄片,并卷起并折叠并再次压出直到获得均匀的片材等。 所得到的产品提供相对柔性的片材,并且比通过可原纤化的聚合物形成的其它电极片材料获得的PTFE负载更低。 PTFE含量越高,电极的电压损失越高。
    • 9. 发明授权
    • Fluorinated carbon composition for use in fabricating a Li/CF.sub.x
battery cathode
    • 用于制造Li / CFx电池阴极的氟化碳组合物
    • US4765968A
    • 1988-08-23
    • US59456
    • 1987-06-08
    • George A. ShiaDavid J. Friedland
    • George A. ShiaDavid J. Friedland
    • H01M4/58H01M4/583C01B31/00H01M4/60
    • H01M4/583H01M4/5835H01M6/16
    • A means to eliminate the suppression of the closed circuit voltage of a Li/CF.sub.x battery during the initial part of its discharge is effected by blending an additive CF.sub.x which does not show significant voltage suppression with the (bulk) CF.sub.x that is normally used in fabricating cathodes for such batteries. Blending is used to get a mixture which has substantially minimized voltage suppression and has good capacity.The closed circuit voltage of a Li/CF.sub.x battery during the initial 10% of discharge is known to be lower than the closed circuit voltage during the later stages. This characteristic adversely impacts applications since the voltage at beginning of life is as low as the voltage indicating end of life, complicating design of circuitry to indicate end of life.In the disclosure, the material with no significant voltage suppression discharges preferentially at the beginning of discharge leading to higher voltage and no suppression. The bulk material also discharges to some extent during this early stage of discharge. When the small percentage of coke-based CF.sub.x additive is depleted, the bulk CF.sub.x has discharged to the point that it no longer shows voltage suppression.
    • 通过将不显示显着电压抑制的添加剂CFx与制造中通常使用的(体积)CFx混合来消除在其初始部分放电期间抑制Li / CF x电池的闭路电压的手段 这种电池的阴极。 混合用于获得基本上最小化电压抑制并具有良好容量的混合物。 在最初的10%放电期间,Li / CFx电池的闭路电压已知低于后期阶段的闭路电压。 该特性对应用有不利的影响,因为寿命开始时的电压与指示寿命终止的电压一样低,使电路的设计复杂化,从而表明寿命终止。 在本公开中,没有明显的电压抑制的材料在放电开始时优先放电导致更高的电压并且没有抑制。 散装材料在放电初期也会有一定程度的放电。 当少量的焦炭基CFx添加剂耗尽时,体积CFx已经放电到不再显示电压抑制的程度。
    • 10. 发明授权
    • Method of inhibiting voltage suppression lithium/fluorinated carbon
batteries
    • 抑制电压抑制锂/氟化碳电池的方法
    • US4686161A
    • 1987-08-11
    • US776546
    • 1985-09-16
    • George A. ShiaDavid J. Friedland
    • George A. ShiaDavid J. Friedland
    • H01M4/06H01M4/08H01M4/58H01M10/44
    • H01M4/5835
    • A means to eliminate the suppression of the closed circuit voltage of a Li/CF.sub.x battery during the initial part of its discharge is effected by blending an additive CF.sub.x which does not show significant voltage suppression with the (bulk) CF.sub.x that is normally used in fabricating cathodes for such batteries. Blending is used to get a mixture which has substantially minimized voltage suppression and has good capacity.The closed circuit voltage of a Li/CF.sub.x battery during the initial 10% of discharge is known to be lower than the closed circuit voltage during the later stages. This characteristic adversely impacts applications since the voltage at beginning of life is as low as the voltage indicating end of life, complicating design of circuitry to indicate end of life.In the disclosure, the material with no significant voltage suppression discharge, preferentially at the beginning of discharge leading to higher voltage and no suppression. The bulk material also discharges to some extent during this early stage of discharge. When the small percentage of coke-based CF.sub.x additive is depleted, the bulk CF.sub.x has discharged to the point that it no longer shows voltage suppression.
    • 通过将不显示显着电压抑制的添加剂CFx与制造中通常使用的(体积)CFx混合来消除在其初始部分放电期间抑制Li / CF x电池的闭路电压的手段 这种电池的阴极。 混合用于获得基本上最小化电压抑制并具有良好容量的混合物。 在最初的10%放电期间,Li / CFx电池的闭路电压已知低于后期阶段的闭路电压。 该特性对应用有不利的影响,因为寿命开始时的电压与指示寿命终止的电压一样低,使电路的设计复杂化,从而表明寿命终止。 在本公开中,材料没有明显的电压抑制放电,优先在放电开始时导致较高的电压而不受抑制。 散装材料在放电初期也会有一定程度的放电。 当少量的焦炭基CFx添加剂耗尽时,体积CFx已经放电到不再显示电压抑制的程度。