Abstract: A cyclic carbonate-modified silane or siloxane is combined with a non-aqueous solvent and an electrolyte salt to form a non-aqueous electrolytic solution, which is used to construct a secondary battery having improved temperature and high-output characteristics.

Abstract: A non-aqueous electrolytic solution is provided comprising a non-aqueous solvent, an electrolyte salt, and a siloxane modified with ether bond-bearing organic group. A non-aqueous electrolyte secondary battery using the same has improved characteristics both at low temperatures and at high outputs.

Abstract: A siloxane modified with a cyclic carbonate of the formula: is combined with a non-aqueous solvent and an electrolyte salt to form a non-aqueous electrolytic solution, which is used to construct a secondary battery having improved temperature and cycle characteristics.

Abstract: A non-aqueous electrolyte secondary battery negative electrode material is provided wherein a negative electrode active material containing a lithium ion-occluding and releasing material which has been treated with an organosilicon base surface treating agent is surface coated with a conductive coating. Using the negative electrode material, a lithium ion secondary battery having a high capacity and improved cycle performance is obtainable.

Abstract: A non-aqueous electrolyte secondary battery comprises a negative electrode comprising a negative electrode active material containing silicon capable of intercalating and deintercalating lithium ions, a positive electrode comprising a positive electrode active material containing an oxide, sulfide or organic polymer capable of intercalating and deintercalating lithium ions, and a non-aqueous electrolyte solution containing a lithium salt. A lithium-containing film is coated or laminated to the negative electrode to make up an irreversible capacity of lithium to be left in the negative electrode.

Abstract: A separator carries lithium particles on its surface. Using the separator, a non-aqueous electrolyte secondary battery having a high initial efficiency and improved cycle retentivity is available.

Abstract: A method for producing a SiOx (x<1) is provided. The SiOx produced is adapted for use as an anode material in producing a lithium ion secondary battery having a large capacity which does not experience degradation with repeated cycles of use, and which has low irreversible capacity in the initial charge and discharge. The method for producing a SiOx (x<1) comprises the steps of heating a starting material which generates a silicon oxide gas to a temperature in the range of 1,100 to 1,600° C. in the presence of an inert gas or under a reduced pressure to produce the silicon oxide gas, while heating is metal silicon to a temperature in the range of 1,800 to 2,400° C. in the presence of an inert gas or under a reduced pressure to generate silicon gas, and precipitating the gas mixture of the silicon oxide gas and the metal silicon gas on a surface of a substrate.

Abstract: An efficient method for producing a silicon oxide powder at a low cost is provided. This method comprises the steps of heating a powder mixture of a silicon dioxide powder and a metal silicon powder to a temperature of 1,100 to 1,450° C. in an inert gas or under reduced pressure to generate silicon monoxide gas, and precipitating the silicon monoxide gas on a surface of a substrate to produce the silicon oxide powder, and in this method, the silicon dioxide powder has an average particle diameter of up to 1 ?m, and the metal silicon powder has an average particle diameter of 30 ?m.

Abstract: A SiCO—Li composite is prepared by causing a reactive silane and/or siloxane having crosslinkable groups to crosslink, sintering the crosslinked product into an inorganic Si—C—O composite, and doping the Si—C—O composite with lithium. When the SiCO—Li composite is used as a negative electrode, a lithium ion secondary cell exhibits good cycle performance, unique discharge characteristics and improved initial efficiency.

Abstract: A silicon-silicon oxide-lithium composite comprises a silicon-silicon oxide composite having such a structure that silicon grains having a size of 0.5-50 nm are dispersed in silicon oxide, the silicon-silicon oxide composite being doped with lithium. Using the silicon-silicon oxide-lithium composite as a negative electrode material, a lithium ion secondary cell having a high initial efficiency and improved cycle performance can be constructed.

Abstract: A non-aqueous electrolytic solution is provided comprising a non-aqueous solvent, an electrolyte salt, and a siloxane-modified polyoxyalkylene compound having (poly)organosiloxane structures at both ends of polyoxyalkylene. A secondary battery using the same has improved temperature characteristics and high-output characteristics.

Abstract: A siloxane modified with a cyclic carbonate of the formula: is combined with a non-aqueous solvent and an electrolyte salt to form a non-aqueous electrolytic solution, which is used to construct a secondary battery having improved temperature and cycle characteristics.

Abstract: A cyclic carbonate-modified silane or siloxane is combined with a non-aqueous solvent and an electrolyte salt to form a non-aqueous electrolytic solution, which is used to construct a secondary battery having improved temperature and cycle characteristics.

Abstract: A polyoxyalkylene-modified silane is combined with a non-aqueous solvent and an electrolyte salt to form a non-aqueous electrolytic solution, which is used to construct a secondary battery having improved temperature and high-output characteristics.

Abstract: A carbonate-modified silane or siloxane is combined with a non-aqueous solvent and an electrolyte salt to form a non-aqueous electrolytic solution, which is used to construct a secondary battery having improved charge/discharge characteristics.

Abstract: A non-aqueous electrolytic solution is provided comprising a non-aqueous solvent, an electrolyte salt, and a siloxane-modified polyoxyalkylene compound having (poly)organosiloxane structures at both ends of polyoxyalkylene. A secondary battery using the same has improved temperature characteristics and high-output characteristics.

Abstract: A conductive silicon composite in which particles of the structure that silicon crystallites are dispersed in silicon dioxide are coated on their surfaces with carbon affords satisfactory cycle performance when used as the negative electrode material in a non-aqueous electrolyte secondary cell.

Abstract: A cyclic carbonate-modified silane or siloxane is combined with a non-aqueous solvent and an electrolyte salt to form a non-aqueous electrolytic solution, which is used to construct a secondary battery having improved temperature and high-output characteristics.

Abstract: A metallic silicon powder is prepared by effecting chemical reduction on silica stone, metallurgical refinement, and metallurgical and/or chemical purification to reduce the content of impurities. The powder is best suited as a negative electrode material for non-aqueous electrolyte secondary cells, affording better cycle performance.

Abstract: A non-aqueous electrolytic solution is provided comprising a non-aqueous solvent, an electrolyte salt, and a siloxane modified with ether bond-bearing organic group. A non-aqueous electrolyte secondary battery using the same has improved characteristics both at low temperatures and at high outputs.