BATTERY SEPARATORS COMPRISING HYBRID SOLID STATE ELECTROLYTE COATINGS

    公开(公告)号:US20220020974A1

    公开(公告)日:2022-01-20

    申请号:US16928052

    申请日:2020-07-14

    Abstract: A separator includes a porous polymeric separator having an anode side and a cathode side, a cathode-compatible material applied to the cathode side, wherein the cathode-compatible material comprises a polymeric binder and one or more of lithium aluminum titanium phosphate (LATP) particles, lithium lanthanum titanate (LLTO) particles, lithium aluminum germanium phosphate (LAGP) particles, and lithium superionic conductor (LISICON) particles, and an anode-compatible material applied to the anode side, wherein the anode-compatible material comprises lithium lanthanum zirconium oxide (LLZO) particles and a polymeric binder. The polymeric binder of the cathode-compatible material can be polyvinylidene fluoride and the polymeric binder of the anode-compatible material can be polyvinylidene. The polymeric binder of the cathode-compatible material the anode-compatible material can be the polymeric separator. The LLZO particles and the one or more of LATP, LLTO, LAGP, and LISICON particles can have an average particle size of 10 nm to 10 μm.

    Negative electrode for lithium secondary battery and method of manufacturing

    公开(公告)号:US10938028B2

    公开(公告)日:2021-03-02

    申请号:US16165292

    申请日:2018-10-19

    Inventor: Li Yang Mei Cai Fan Xu

    Abstract: A negative electrode for an electrochemical cell of a secondary lithium metal battery may comprise a negative electrode current collector and a three-dimensional columnar lithium metal layer formed on a surface of the current collector. The columnar lithium metal layer may comprise a plurality of lithium metal columns and may be formed on the current collector using an electrochemical deposition process. In such process, the current collector and a counter electrode may be at least partially submerged in a nonaqueous liquid electrolyte solution and an electrical potential may be established between the metal substrate and the counter electrode such that lithium ions in the electrolyte solution are reduced to metallic lithium and deposited on the surface of the current collector in the form of a three-dimensional columnar lithium metal layer. The electrolyte solution may comprise lithium bis(fluorosulfonyl)imide (LiFSI) in a solution of fluoroethylene carbonate (FEC) and dimethyldicarbonate (DMDC).

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