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    METHODS FOR PRE-LITHIATING SILICON AND SILICON OXIDE ELECTRODES
    3.
    发明申请
    METHODS FOR PRE-LITHIATING SILICON AND SILICON OXIDE ELECTRODES 审中-公开

    公开(公告)号：US20200176755A1

    公开(公告)日：2020-06-04

    申请号：US16209027

    申请日：2018-12-04

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Xiaosong Huang ,  Xingcheng Xiao ,  Li Yang ,  Hamid G. Kia

    IPC分类号： H01M4/1395 ,  H01M4/131 ,  H01M4/134 ,  H01M4/1391 ,  H01M10/0525 ,  H01M10/058 ,  H01M2/14

    摘要： Methods for pre-lithiating an anode include providing the anode having a host material comprising silicon particles or SiOx particles, disposing a first side of an electrically conductive pre-lithiating separator contiguous with the anode, and disposing a lithium source contiguous with a second side of the pre-lithiating separator such that lithium ions migrate to the host material via the pre-lithiating separator. The pre-lithiating separator comprises a porous body, one or more solvents, and one or more lithium ions. Method for manufacturing a battery cell, further include separating the pre-lithiating separator from the lithiated anode, and combining the lithiated anode with a battery separator and a lithium cathode to form a battery cell. The methods can further include applying a voltage to the anode and the lithium source, or maintaining a constant current between the lithium source and the anode while lithium ions migrate to the host material.

    HYBRID METAL-ORGANIC FRAMEWORK SEPARATORS FOR ELECTROCHEMICAL CELLS
    5.
    发明申请
    HYBRID METAL-ORGANIC FRAMEWORK SEPARATORS FOR ELECTROCHEMICAL CELLS 审中-公开

    公开(公告)号：US20190089006A1

    公开(公告)日：2019-03-21

    申请号：US15710326

    申请日：2017-09-20

    申请人： GM Global Technology Operations LLC

    发明人： Li Yang ,  Mei Cai ,  Anne M. Dailly ,  Fang Dai

    IPC分类号： H01M10/14 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/525

    摘要： A hybrid separator for an electrochemical cell is provided, along with methods of making the hybrid separator. The hybrid separator includes a first metal-organic framework comprising copper and having a plurality of first pores and a second distinct metal-organic framework comprising indium or zinc and having a plurality of second pores. The hybrid separator is capable of adsorbing one or more lithium salts in at least one of the plurality of first pores or the plurality of second pores so as to be ionically conductive. The hybrid separator may have a conductivity greater than or equal to about 0.1 mS/cm to less than or equal to about 1 mS/cm and is substantially free of any polymeric binder.

    ELECTROLYTE SYSTEM FOR SILICON-CONTAINING ELECTRODES
    6.
    发明申请
    ELECTROLYTE SYSTEM FOR SILICON-CONTAINING ELECTRODES 审中-公开

    公开(公告)号：US20180309169A1

    公开(公告)日：2018-10-25

    申请号：US15491089

    申请日：2017-04-19

    申请人： GM Global Technology Operations LLC

    发明人： Li Yang ,  Mei Cai ,  Peng Lu ,  Fang Dai

    IPC分类号： H01M10/0569 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/131 ,  H01M4/48

    摘要： Electrochemical cells that cycle lithium ions are provided. The electrochemical cells have an electrode that includes a silicon-containing electroactive material that undergoes volumetric expansion and contraction during the cycling of the electrochemical cell; and an electrolyte system that promotes passive formation of a flexible protective layer comprising a lithium fluoride-polymer composite on one or more exposed surface regions of the silicon-containing electroactive material. The electrolyte system includes a lithium salt, at least one cyclic carbonate, and two or more linear carbonates. At least one of the two or more linear carbonate-containing co-solvents is a fluorinated carbonate-containing co-solvent. The electrolyte system accommodates the volumetric expansion and contraction of the silicon-containing electroactive material to promote long term cycling stability.

    METHODS FOR MAKING A SOLID ELECTROLYTE INTERFACE LAYER ON A SURFACE OF AN ELECTRODE
    10.
    发明申请
    METHODS FOR MAKING A SOLID ELECTROLYTE INTERFACE LAYER ON A SURFACE OF AN ELECTRODE 有权
    在电极表面上制造固体电解质界面层的方法

    公开(公告)号：US20160141598A1

    公开(公告)日：2016-05-19

    申请号：US14932361

    申请日：2015-11-04

    申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

    发明人： Fang Dai ,  Mei Cai ,  Qiangfeng Xiao ,  Li Yang

    IPC分类号： H01M4/04 ,  H01M10/0567 ,  H01M10/052 ,  C25D9/02

    CPC分类号： H01M4/0452 ,  C25D9/02 ,  H01M4/0447 ,  H01M4/139 ,  H01M4/362 ,  H01M4/382 ,  H01M10/049 ,  H01M10/052 ,  H01M10/0567

    摘要： In an example of the method for making a solid electrolyte interface (SEI) layer on a surface of an electrode, the electrode is exposed to an electrolyte solution in an electrochemical cell. The electrolyte solution includes either i) an organo-polysulfide additive having a formula RSnR′ (n>2), wherein R and R′ are independently selected from a methyl group, an unsaturated chain, a 3-(Trimethoxysilyl)-1-propyl group, or a 4-nitrophenyl group, or ii) a fluorinated organo-polysulfide additive having a formula RSnR′ (n>2), wherein R and R′ can be the same or different, and wherein R and R′ each have a general formula of CxHyF(2x−y+1), where x is at least 1 and y ranges from 0 to 2x. A voltage or a load is applied to the electrochemical cell.

    摘要翻译： 在电极表面上制造固体电解质界面（SEI）层的方法的实例中，电极暴露于电化学电池中的电解质溶液。 电解质溶液包括i）具有式RSnR'（n> 2）的有机多硫化物添加剂，其中R和R'独立地选自甲基，不饱和链，3-（三甲氧基甲硅烷基）-1-丙基 基团或4-硝基苯基，或ii）具有式RS n R'（n> 2）的氟化有机多硫化物添加剂，其中R和R'可以相同或不同，并且其中R和R'各自具有 C x H y F（2x-y + 1）的通式，其中x至少为1，y的范围为0至2。 向电化学电池施加电压或负载。