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    Co-solvents with high coulombic efficiency in propylene carbonate based electrolytes
    1.
    发明授权
    Co-solvents with high coulombic efficiency in propylene carbonate based electrolytes 有权

    公开(公告)号：US10581118B2

    公开(公告)日：2020-03-03

    申请号：US15632153

    申请日：2017-06-23

    申请人： Gao Liu ,  Hui Zhao ,  Sang-Jae Park

    发明人： Gao Liu ,  Hui Zhao ,  Sang-Jae Park

    IPC分类号： H01M10/0568 ,  H01M10/0569 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/58 ,  H01M4/587 ,  H01M10/052

    摘要： A homologous series of cyclic carbonate or propylene carbonate (PC) analog solvents with increasing length of linear alkyl substitutes were synthesized and used as co-solvents with PC for graphite based lithium ion half cells. A graphite anode reaches a capacity around 310 mAh/g in PC and its analog co-solvents with 99.95% Coulombic efficiency. Cyclic carbonate co-solvents with longer alkyl chains are able to prevent exfoliation of graphite when used as co-solvents with PC. The cyclic carbonate co-solvents of PC compete for solvation of Li ion with PC solvent, delaying PC co-intercalation. Reduction products of PC on graphite surfaces via single-electron path form a stable Solid Electrolyte Interphase (SEI), which allows the reversible cycling of graphite.

    Co-solvents with High Coulombic Efficiency in Propylene Carbonate Based Electrolytes
    2.
    发明申请
    Co-solvents with High Coulombic Efficiency in Propylene Carbonate Based Electrolytes 有权
    在丙烯碳酸酯基电解质中具有高库仑效率的共溶剂

    公开(公告)号：US20150099191A1

    公开(公告)日：2015-04-09

    申请号：US14506158

    申请日：2014-10-03

    申请人： Gao Liu ,  Hui Zhao ,  Sang-Jae Park

    发明人： Gao Liu ,  Hui Zhao ,  Sang-Jae Park

    IPC分类号： H01M10/0569 ,  H01M4/134 ,  H01M10/0525

    CPC分类号： H01M10/0569 ,  H01M4/382 ,  H01M4/386 ,  H01M4/5825 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0568 ,  H01M2220/20 ,  H01M2300/0037 ,  Y02E60/122 ,  Y02T10/7011

    摘要： A homologous series of cyclic carbonate or propylene carbonate (PC) analogue solvents with increasing length of linear alkyl substitutes were synthesized and used as co-solvents with PC for graphite based lithium ion half cells. A graphite anode reaches a capacity around 310 mAh/g in PC and its analogue co-solvents with 99.95% Coulombic efficiency. Cyclic carbonate co-solvents with longer alkyl chains are able to prevent exfoliation of graphite when used as co-solvents with PC. The cyclic carbonate co-solvents of PC compete for solvation of Li ion with PC solvent, delaying PC co-intercalation. Reduction products of PC on graphite surfaces via single-electron path form a stable Solid Electrolyte Interphase (SEI), which allows the reversible cycling of graphite.

    摘要翻译： 合成了直链烷基取代基长度长的环状碳酸酯或碳酸亚丙酯（PC）类似物溶剂的同系物系，并与PC作为石墨基锂离子半电池的辅助溶剂。 在PC及其模拟助溶剂中，石墨阳极达到310 mAh / g的容量，具有99.95％的库仑效率。 与较长的烷基链的环状碳酸酯共溶剂在与PC共溶剂时能够防止石墨脱落。 PC的环状碳酸酯共溶剂与PC溶剂竞争Li离子溶剂化，延缓PC共嵌入。 通过单电子路径在石墨表面上的PC的还原产物形成稳定的固体电解质相（SEI），其允许石墨的可逆循环。

    Porous Silicon Oxide (SiO) Anode Enabled by a Conductive Polymer Binder and Performance Enhancement by Stabilized Lithium Metal Power (SLMP)
    6.
    发明申请
    Porous Silicon Oxide (SiO) Anode Enabled by a Conductive Polymer Binder and Performance Enhancement by Stabilized Lithium Metal Power (SLMP) 审中-公开
    通过导电聚合物粘合剂引起的多孔氧化硅（SiO）阳极和通过稳定的锂金属功率（SLMP）的性能增强

    公开(公告)号：US20160164073A1

    公开(公告)日：2016-06-09

    申请号：US14741383

    申请日：2015-06-16

    申请人： Gao Liu ,  Hui Zhao

    发明人： Gao Liu ,  Hui Zhao

    IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/48 ,  H01M4/62

    CPC分类号： H01M4/364 ,  H01B1/128 ,  H01B1/22 ,  H01M4/0404 ,  H01M4/13 ,  H01M4/366 ,  H01M4/382 ,  H01M4/48 ,  H01M4/483 ,  H01M4/622 ,  H01M4/623 ,  H01M4/625 ,  H01M4/661 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20 ,  Y02T10/7011

    摘要： The invention demonstrates that only 2% functional conductive polymer binder without any conductive additives was successfully used with a micron-size silicon monoxide (SiO) anode material, demonstrating stable and high gravimetric capacity (>1000 mAh/g) for ˜500 cycles and more than 90% capacity retention. Prelithiation of this anode using stabilized lithium metal powder (SLMP®) improves the first cycle Coulombic efficiency of a SiO/NMC full cell from ˜48% to ˜90%. This combination enables good capacity retention of more than 80% after 100 cycles at C/3 in a lithium-ion full cell. We also demonstrate the important connection between porosity and the loading of silicon electrodes. By employing a highly porous silicon electrode, a high areal capacity (3.3 mAh/cm2) is obtained. This method works well to achieve high loading of other high-capacity alloy anodes, the state-of-art graphite anode, as well as a high loading of positive electrodes for LIBs.

    摘要翻译： 本发明表明，只有2％的功能性导电聚合物粘合剂没有任何导电添加剂成功地与微米尺寸的一氧化硅（SiO）阳极材料一起使用，证明稳定和高重量的容量（> 1000mAh / g）〜500个循环等等 超过90％的容量保留。 使用稳定的锂金属粉末（SLMP®）对该阳极进行预锂化可将SiO / NMC全电池的第一次循环库仑效率从〜48％提高到〜90％。 这种组合在锂离子全电池中在C / 3上100次循环后能够保持80％以上的良好容量。 我们还展示了孔隙率和硅电极负载之间的重要联系。 通过使用高度多孔的硅电极，获得高的面积容量（3.3mAh / cm 2）。 该方法可以很好地实现其他大容量合金阳极的高负荷，最先进的石墨阳极，以及用于LIB的高负载正电极。

    Silicon Oxide (SiO) Anode Enabled by a Conductive Polymer Binder and Performance Enhancement by Stabilized Lithium Metal Power (SLMP)
    7.
    发明申请
    Silicon Oxide (SiO) Anode Enabled by a Conductive Polymer Binder and Performance Enhancement by Stabilized Lithium Metal Power (SLMP) 审中-公开
    通过导电聚合物粘合剂引起的氧化硅（SiO）阳极和通过稳定的锂金属电力（SLMP）的性能增强

    公开(公告)号：US20150364755A1

    公开(公告)日：2015-12-17

    申请号：US14741350

    申请日：2015-06-16

    申请人： Gao Liu ,  Hui Zhao ,  Zhihui Wang

    发明人： Gao Liu ,  Hui Zhao ,  Zhihui Wang

    IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M4/04 ,  H01M4/583 ,  H01M4/66 ,  H01M4/62 ,  H01B1/12 ,  H01M4/48

    CPC分类号： H01M4/364 ,  H01B1/128 ,  H01B1/22 ,  H01M4/0404 ,  H01M4/13 ,  H01M4/366 ,  H01M4/382 ,  H01M4/48 ,  H01M4/483 ,  H01M4/622 ,  H01M4/623 ,  H01M4/625 ,  H01M4/661 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20 ,  Y02T10/7011

    摘要： Silicon alloys have the highest specific capacity when used as anode material for lithium-ion batteries, however, the drastic volume change inherent in their use causes formidable challenges toward achieving stable cycling performance. Large quantities of binders and conductive additives are typically necessary to maintain good cell performance. In one embodiment of the invention, only 2% (by weight) functional conductive polymer binder without any conductive additives was successfully used with a micron-size silicon monoxide (SiO) anode material, demonstrating stable and high gravimetric capacity (>1000 mAh/g) for ˜500 cycles and more than 90% capacity retention. Prelithiation of this anode using stabilized lithium metal powder (SLMP®) improves the first cycle Coulombic efficiency of a SiO/NMC full cell from ˜48% to ˜90%. This combination enables good capacity retention of more than 80% after 100 cycles at C/3 in a lithium-ion full cell.

    摘要翻译： 当用作锂离子电池的负极材料时，硅合金具有最高的比容量，然而，其使用固有的剧烈体积变化对实现稳定的循环性能造成了巨大的挑战。 通常需要大量的粘合剂和导电添加剂来保持良好的电池性能。 在本发明的一个实施方案中，只有2％（重量）的功能性导电聚合物粘合剂，没有任何导电添加剂成功地与微米尺寸的一氧化硅（SiO）阳极材料一起使用，证实了稳定和高重量的容量（> 1000mAh / g ）〜500次循环和超过90％的容量保持率。 使用稳定的锂金属粉末（SLMP®）对该阳极进行预锂化可将SiO / NMC全电池的第一次循环库仑效率从〜48％提高到〜90％。 这种组合在锂离子全电池中在C / 3上100次循环后能够保持80％以上的良好容量。

    Porous silicon oxide (SiO) anode enabled by a conductive polymer binder and performance enhancement by stabilized lithium metal power (SLMP)
    9.
    发明授权
    Porous silicon oxide (SiO) anode enabled by a conductive polymer binder and performance enhancement by stabilized lithium metal power (SLMP) 有权

    公开(公告)号：US10340508B2

    公开(公告)日：2019-07-02

    申请号：US14741383

    申请日：2015-06-16

    申请人： Gao Liu ,  Hui Zhao

    发明人： Gao Liu ,  Hui Zhao

    IPC分类号： H01M4/36 ,  H01B1/12 ,  H01M4/38 ,  H01M4/66 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0525 ,  H01B1/22 ,  H01M4/13 ,  H01M4/48 ,  H01M4/02

    摘要： The invention demonstrates that only 2% functional conductive polymer binder without any conductive additives was successfully used with a micron-size silicon monoxide (SiO) anode material, demonstrating stable and high gravimetric capacity (>1000 mAh/g) for ˜500 cycles and more than 90% capacity retention. Prelithiation of this anode using stabilized lithium metal powder (SLMP®) improves the first cycle Coulombic efficiency of a SiO/NMC full cell from ˜48% to ˜90%. This combination enables good capacity retention of more than 80% after 100 cycles at C/3 in a lithium-ion full cell. We also demonstrate the important connection between porosity and the loading of silicon electrodes. By employing a highly porous silicon electrode, a high areal capacity (3.3 mAh/cm2) is obtained. This method works well to achieve high loading of other high-capacity alloy anodes, the state-of-art graphite anode, as well as a high loading of positive electrodes for LIBs.