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    Electrolytes for rechargeable batteries
    2.
    发明授权
    Electrolytes for rechargeable batteries 有权
    可充电电池用电解液

    公开(公告)号：US09142864B2

    公开(公告)日：2015-09-22

    申请号：US13296753

    申请日：2011-11-15

    申请人： Gregory Alan Roberts ,  Rainer J Fasching ,  Constantin I Stefan

    发明人： Gregory Alan Roberts ,  Rainer J Fasching ,  Constantin I Stefan

    IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M10/0569 ,  B82Y30/00 ,  H01M4/04 ,  H01M4/134 ,  H01M4/48 ,  H01M10/052 ,  H01M10/0568

    CPC分类号： H01M10/0569 ,  B82Y30/00 ,  H01M4/0428 ,  H01M4/134 ,  H01M4/366 ,  H01M4/386 ,  H01M4/483 ,  H01M4/75 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0568 ,  H01M2300/0034 ,  H01M2300/0037 ,  Y02E60/122

    摘要： Provided are novel electrolytes for use in rechargeable lithium ion cells containing high capacity active materials, such as silicon, germanium, tin, and/or aluminum. These novel electrolytes include one or more pyrocarbonates and, in certain embodiments, one or more fluorinated carbonates. For example, dimethyl pyrocarbonate (DMPC) may be combine with mono-fluoroethylene carbonate (FEC). Alternatively, DMPC or other pyrocarbonates may be used without any fluorinated carbonates. A weight ratio of pyrocarbonates may be between about 0% and 50%, for example, about 10%. Pyrocarbonates may be combined with other solvents, such as ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), diethyl carbonate (DEC), and/or ethyl-methyl carbonate (EMC). Alternatively, pyrocarbonates may be used without such solvents. Experimental results conducted using electrochemical cells with silicon based electrodes demonstrated substantial improvements in cycle life when pyrocarbonate containing electrolytes were used in comparison with pyrocarbonate free electrolytes.

    摘要翻译： 提供了用于可再充电锂离子电池的新型电解质，其包含高容量活性材料，例如硅，锗，锡和/或铝。 这些新型电解质包括一种或多种热解碳酸盐，并且在某些实施方案中包括一种或多种氟化碳酸盐。 例如，焦碳酸二甲酯（DMPC）可以与单氟代碳酸亚乙酯（FEC）组合。 或者，可以使用DMPC或其它焦碳酸酯而没有任何氟化碳酸酯。 焦碳酸酯的重量比可以在约0％至50％之间，例如约10％。 焦碳酸酯可以与其它溶剂如碳酸亚乙酯（EC），碳酸亚丙酯（PC），碳酸二甲酯（DMC），碳酸二乙酯（DEC）和/或碳酸甲乙酯（EMC）等组合。 或者，可以使用焦碳酸酯而不使用这些溶剂。 使用具有硅基电极的电化学电池进行的实验结果表明，当使用含焦碳酸盐的电解质与无焦碳酸盐电解质相比时，循环寿命显着改善。

    ELECTROLYTES FOR RECHARGEABLE BATTERIES
    3.
    发明申请
    ELECTROLYTES FOR RECHARGEABLE BATTERIES 有权
    电解电容器可充电电池

    公开(公告)号：US20120121989A1

    公开(公告)日：2012-05-17

    申请号：US13296753

    申请日：2011-11-15

    申请人： Gregory Alan Roberts ,  Rainer J. Fasching ,  Constantin I. Stefan

    发明人： Gregory Alan Roberts ,  Rainer J. Fasching ,  Constantin I. Stefan

    IPC分类号： H01M10/056

    CPC分类号： H01M10/0569 ,  B82Y30/00 ,  H01M4/0428 ,  H01M4/134 ,  H01M4/366 ,  H01M4/386 ,  H01M4/483 ,  H01M4/75 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0568 ,  H01M2300/0034 ,  H01M2300/0037 ,  Y02E60/122

    摘要： Provided are novel electrolytes for use in rechargeable lithium ion cells containing high capacity active materials, such as silicon, germanium, tin, and/or aluminum. These novel electrolytes include one or more pyrocarbonates and, in certain embodiments, one or more fluorinated carbonates. For example, dimethyl pyrocarbonate (DMPC) may be combine with mono-fluoroethylene carbonate (FEC). Alternatively, DMPC or other pyrocarbonates may be used without any fluorinated carbonates. A weight ratio of pyrocarbonates may be between about 0% and 50%, for example, about 10%. Pyrocarbonates may be combined with other solvents, such as ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), diethyl carbonate (DEC), and/or ethyl-methyl carbonate (EMC). Alternatively, pyrocarbonates may be used without such solvents. Experimental results conducted using electrochemical cells with silicon based electrodes demonstrated substantial improvements in cycle life when pyrocarbonate containing electrolytes were used in comparison with pyrocarbonate free electrolytes.

    摘要翻译： 提供了用于可再充电锂离子电池的新型电解质，其包含高容量活性材料，例如硅，锗，锡和/或铝。 这些新型电解质包括一种或多种热解碳酸盐，并且在某些实施方案中包括一种或多种氟化碳酸盐。 例如，焦碳酸二甲酯（DMPC）可以与单氟代碳酸亚乙酯（FEC）组合。 或者，可以使用DMPC或其它焦碳酸酯而没有任何氟化碳酸酯。 焦碳酸酯的重量比可以在约0％至50％之间，例如约10％。 焦碳酸酯可以与其它溶剂如碳酸亚乙酯（EC），碳酸亚丙酯（PC），碳酸二甲酯（DMC），碳酸二乙酯（DEC）和/或碳酸甲乙酯（EMC）等组合。 或者，可以使用焦碳酸酯而不使用这些溶剂。 使用具有硅基电极的电化学电池进行的实验结果表明，当使用含焦碳酸盐的电解质与无焦碳酸盐电解质相比时，循环寿命显着改善。

    Forming multilayered solid electrolyte interphase structures on high capacity electrodes
    4.
    发明授权
    Forming multilayered solid electrolyte interphase structures on high capacity electrodes 有权
    在高容量电极上形成多层固体电解质相间结构

    公开(公告)号：US09112212B1

    公开(公告)日：2015-08-18

    申请号：US13281252

    申请日：2011-10-25

    申请人： Rainer J Fasching ,  Gregory Alan Roberts ,  Yi Cui ,  Song Han

    发明人： Rainer J Fasching ,  Gregory Alan Roberts ,  Yi Cui ,  Song Han

    IPC分类号： H01M4/134 ,  H01M4/02

    CPC分类号： H01M4/134 ,  H01M4/02 ,  H01M4/366 ,  H01M2004/021

    摘要： Provided are novel methods of fabricating electrochemical cells containing high capacity active materials that form multilayered solid electrolyte interphase (SEI) structures on the active material surface during cell fabrication. Combining multiple different SEI layers on one surface can substantially improve cell performance by providing each layer with different properties. For example, an outer layer having a high electronic resistance may be combined with an inner layer having a high ionic permeability. To form such multilayered SEI structures, formation may involve changing electrolyte composition, functionalizing surfaces, and/or varying formation conditions. For example, formation may start with a boron containing electrolyte. This initial electrolyte is then replaced with an electrolyte that does not contain boron and instead may contain fluorine additives. In certain embodiments, cell's temperature is changed during formation to initiate different chemical reactions during SEI formation. Variations in multilayered SEI structures may be also achieved by varying current rates.

    摘要翻译： 提供了在电池制造期间在活性材料表面上形成含有高容量活性材料的电化学电池的新颖方法，其在活性材料表面上形成多层固体电解质间相（SEI）结构。 在一个表面上组合多个不同的SEI层可以通过提供每个层具有不同的性质来显着改善电池的性能。 例如，具有高电子电阻的外层可以与具有高离子渗透性的内层组合。 为了形成这种多层SEI结构，形成可能涉及改变电解质组成，官能化表面和/或变化的形成条件。 例如，可以用含硼电解质开始形成。 然后用不含硼的电解质替代该初始电解质，并且可以含有氟添加剂。 在某些实施方案中，细胞的温度在形成过程中改变，以在SEI形成过程中引发不同的化学反应。 多层SEI结构的变化也可以通过改变当前速率来实现。