Abstract: A solid electrolyte material for a lithium secondary battery, an electrode, and a battery, relating in particular to an additive material capable of improving rapid transmission of ions in lithium secondary battery electrodes, a preparation method therefor and application thereof, and a solid electrolyte material for a secondary battery, a preparation method therefor and application thereof, as well as an electrode, an electrolyte thin layer, and a preparation method therefor.

Abstract: An inorganic sulfide solid electrolyte having high air stability, and a preparation method and use thereof In the invention, some or all of P elements in a sulfide electrolyte are replaced with Sb elements, thereby providing an electrolyte having high air stability and ion mobility and applicable to an all-solid lithium secondary battery. The resulting inorganic sulfide electrolyte comprises the following materials: Li10M(P1-aSba)2S12, Li6(P1-aSba)S5X and Li3(P1-aSba)S4, where M is one or more of Ge, Si or Sn, X is one or more of F, Cl, Br or I, and 0.01?a?1.

Abstract: The invention relates to a nano silicon-carbon composite negative material for lithium ion batteries and a preparation method thereof. A porous electrode composed of silica and carbon is taken as a raw material, and a nano silicon-carbon composite material of carbon-loaded nano silicon is formed by a molten salt electrolysis method in a manner of silica in-situ electrochemical reduction. Silicon and carbon of the material are connected by nano silicon carbide, and are metallurgical-grade combination, so that the electrochemical cycle stability of the nano silicon-carbon composite material is improved.

Abstract: An anode composite material for lithium ion battery and a preparation method thereof. The composite material is a composite material formed by compounding at least one of SiCO, SiCNO, SiCN and SiBCN with LiaMbPO4, wherein 0.95?a?1.1, 0.95?b?1.1, and M is at least one of Fe, Co, Ni and Mn. The content of at least one of SiCO, SiCNO, SiCN and SiBCN in the anode composite material is in a range of 1-20 wt % of the total weight of the composite material. The composite material formed by compounding at least one of SiCO, SiCNO, SiCN and SiBCN with LiaMbPO4 is obtained by adding LiaMbPO4 into at least one organosilicon polymer of polysiloxane, polysilazane, and polyborosilazane, and then curing, crosslinking, and pyrolyzing. Compared with LiaMbPO4, the composite material has a notable improvement in electrochemistry performance and tap density.

Abstract: An anode composite material for lithium ion battery and a preparation method thereof. The composite material is a composite material formed by compounding at least one of SiCO, SiCNO, SiCN and SiBCN with LiaMbPO4, wherein 0.95?a?1.1, 0.95?b?1.1, and M is at least one of Fe, Co, Ni and Mn. The content of at least one of SiCO, SiCNO, SiCN and SiBCN in the anode composite material is in a range of 1-20 wt % of the total weight of the composite material. The composite material formed by compounding at least one of SiCO, SiCNO, SiCN and SiBCN with LiaMbPO4 is obtained by adding LiaMbPO4 into at least one organosilicon polymer of polysiloxane, polysilazane, and polyborosilazane, and then curing, crosslinking, and pyrolysing. Compared with LiaMbPO4, the composite material has a notable improvement in electrochemistry performance and tap density.

Abstract: The invention relates to a nano silicon-carbon composite negative material for lithium ion batteries and a preparation method thereof. A porous electrode composed of silica and carbon is taken as a raw material, and a nano silicon-carbon composite material of carbon-loaded nano silicon is formed by a molten salt electrolysis method in a manner of silica in-situ electrochemical reduction. Silicon and carbon of the material are connected by nano silicon carbide, and are metallurgical-grade combination, so that the electrochemical cycle stability of the nano silicon-carbon composite material is improved.

Abstract: An electrochemical method for producing Si nanopowder, Si nanowires and/or Si nanotubes directly from compound SiX or a mixture containing a silicon compound SiX, the method comprises: providing an electrolysis cell having a cathode, an anode and an electrolyte, using the compound SiX or the mixture containing compound SiX as a cathode and immersing the cathode in an electrolyte comprising a metal compound molten salt, applying a potential between the cathode and the anode in the electrolysis cell, and forming one or more of Si nanopowder, Si nanowires and Si nanotubes on the cathode electrode. The method has advantages of: 1) shorter production processing, 2) inexpensive equipment, 3) convenient operation, 4) reduction of contaminate, 5) easily available feed materials, and 6) easy to achieve continuous production. This is a new field of using electrochemical method for producing one-dimensional Si nano material, and a new method of producing Si nanopowder, Si nanowires and Si nanotubes.

Abstract: An electrochemical method for producing Si nanopowder, Si nanowires and/or Si nanotubes directly from compound SiX or a mixture containing a silicon compound SiX, the method comprises: providing an electrolysis cell having a cathode, an anode and an electrolyte, using the compound SiX or the mixture containing compound SiX as a cathode and immersing the cathode in an electrolyte comprising a metal compound molten salt, applying a potential between the cathode and the anode in the electrolysis cell, and forming one or more of Si nanopowder, Si nanowires and Si nanotubes on the cathode electrode. The method has advantages of: 1) shorter production processing, 2) inexpensive equipment, 3) convenient operation, 4) reduction of contaminate, 5) easily available feed materials, and 6) easy to achieve continuous production. This is a new field of using electrochemical method for producing one-dimensional Si nano material, and a new method of producing Si nanopowder, Si nanowires and Si nanotubes.

Abstract: A composite particulate material for use in anodes of lithium-ion batteries. The particles of the material include a graphite core that has been provided with a surface layer including a non-graphitizable carbonaceous material. The graphite core having an interplanar spacing of at least about 0.346 nm. The method of producing the composite is also disclosed.