A solid state lithium carbon monofluoride battery includes an anode comprising Li, a solid electrolyte, and a cathode including CF.sub.x and LPS. The cathode can also include a carbon compound. The solid electrolyte can include LPS. The LPS can include β-Li.sub.3PS.sub.4. The cathode LPS can include β-Li.sub.3PS.sub.4. A method of making a battery is also disclosed.

A method for making a sulfur based cathode composite material is disclosed. Polyacrylonitrile and elemental sulfur are dissolved together in a first solvent to form a first solution. An additive is added to the first solution to mix with the polyacrylonitrile and the elemental sulfur. The additive is at least one of metal and metal sulfide. An environment in which the polyacrylonitrile and the elemental sulfur are located in is changed to reduce a solubility of the polyacrylonitrile and the elemental sulfur in a changed environment to simultaneously precipitate the polyacrylonitrile and the elemental sulfur, thereby forming a precipitate having the additive. The precipitate is heated to chemically react the polyacrylonitrile with the elemental sulfur.

An electrode material for a lithium-ion secondary battery of the present invention includes particles which are made of LiFe.sub.xMn.sub.1-w-x-y-zMg.sub.yCa.sub.zA.sub.wPO.sub.4, have an orthorhombic crystal structure, and have a space group of Pmna, in which a mis-fit value [(1−(b2×c2)/(b1×c1))×100] of a be plane which is computed from lattice constants b1 and c1 of the LiFe.sub.xMn.sub.1-w-x-y-zMg.sub.yCa.sub.zA.sub.wPO.sub.4 and lattice constants b2 and c2 of Fe.sub.xMn.sub.1-w-x-y-zMg.sub.yCa.sub.zA.sub.wPO.sub.4 obtained by deintercalating Li from LiFe.sub.xMn.sub.1-w-x-y-zMg.sub.yCa.sub.zA.sub.wPO.sub.4 by means of an oxidation treatment using nitrosonium tetrafluoroborate in acetonitrile is 1.32% or more and 1.85% or less.

An electrode material for a lithium-ion secondary battery of the present invention includes particles which are made of LiFe.sub.xMn.sub.1-w-x-y-zMg.sub.yCa.sub.zA.sub.wPO.sub.4, have an orthorhombic crystal structure, and have a space group of Pmna, in which a mis-fit value [(1−(b2×c2)/(b1×c1))×100] of a be plane which is computed from lattice constants b1 and c1 of the LiFe.sub.xMn.sub.1-w-x-y-zMg.sub.yCa.sub.zA.sub.wPO.sub.4 and lattice constants b2 and c2 of Fe.sub.xMn.sub.1-w-x-y-zMg.sub.yCa.sub.zA.sub.wPO.sub.4 obtained by deintercalating Li from LiFe.sub.xMn.sub.1-w-x-y-zMg.sub.yCa.sub.zA.sub.wPO.sub.4 by means of an oxidation treatment using nitrosonium tetrafluoroborate in acetonitrile is 1.32% or more and 1.85% or less.

An object of the present invention is to provide a novel sulfur-based positive electrode active material for a lithium-ion secondary battery which is excellent in cyclability and can largely improve a charging and discharging capacity, a positive electrode comprising the positive electrode active material and a lithium-ion secondary battery made using the positive electrode. The sulfur-based positive electrode active material is obtainable by subjecting a starting material comprising a polymer, sulfur and an organometallic compound dispersed in a form of fine particles to heat-treatment under a non-oxidizing atmosphere, wherein the particles of metallic sulfide resulting from sulfurization of the organometallic compound are dispersed in the heat-treated material, and particle size of the metallic sulfide particles is not less than 10 nm and less than 100 nm.

Disclosed herein are a sulfide-based all-solid-state battery and a method of manufacturing the same, wherein the sulfide-based all-solid-state battery includes a positive electrode active material coated with a lithium niobate precursor, which is manufactured by a polyol process having low production cost, such that it improves safety and increases capacity of the sulfide-based all-solid-state battery.

An electrical storage device electrode binder composition exhibits an excellent binding capability, and makes it possible to produce an electrical storage device electrode that exhibits excellent charge-discharge durability characteristics. The electrical storage device electrode binder composition includes a polymer (A) and a liquid medium (B), wherein the polymer (A) is polymer particles, and the ratio (DA/DB) of the average particle size (DA) of the polymer particles measured by using a dynamic light scattering method to the average particle size (DB) of the polymer particles measured by TEM observation is 2 to 10.

An electrode material includes inorganic particles of LiFe.sub.xMn.sub.1-x-yM.sub.yPO.sub.4 and a carbonaceous film coating surfaces of the inorganic particles, and volume of micropores having micropore diameter of 2 to 10 nm is 3 to 11 cm.sup.3/g. A method for manufacturing an electrode material includes immersing the inorganic particles in an aqueous solution having pH of 7.0 to 10.0; producing a slurry including the inorganic particles, a carbonaceous film precursor, and water; producing a dried substance of the slurry by drying the slurry; and calcinating the dried substance in a non-oxidative atmosphere of 500° C. to 1,000° C., and an amount of the carbonaceous film precursor blended into 100 parts by mass of the inorganic particles when converted to a carbon element is 1.0 to 5.0 parts by mass. An electrode includes the electrode material. A lithium-ion secondary battery includes a cathode; an anode; and a non-aqueous electrolyte, the cathode being the electrode.

An electrode material includes inorganic particles of LiFe.sub.xMn.sub.1-x-yM.sub.yPO.sub.4 and a carbonaceous film coating surfaces of the inorganic particles, and volume of micropores having micropore diameter of 2 to 10 nm is 3 to 11 cm.sup.3/g. A method for manufacturing an electrode material includes immersing the inorganic particles in an aqueous solution having pH of 7.0 to 10.0; producing a slurry including the inorganic particles, a carbonaceous film precursor, and water; producing a dried substance of the slurry by drying the slurry; and calcinating the dried substance in a non-oxidative atmosphere of 500° C. to 1,000° C., and an amount of the carbonaceous film precursor blended into 100 parts by mass of the inorganic particles when converted to a carbon element is 1.0 to 5.0 parts by mass. An electrode includes the electrode material. A lithium-ion secondary battery includes a cathode; an anode; and a non-aqueous electrolyte, the cathode being the electrode.

The present invention relates to a method for producing lithium aluminum titanium phosphates of the general formula Li.sub.1+xTi.sub.2−xAl.sub.x(PO.sub.4).sub.3, wherein x is ≦0.4, a method for their production as well as their use as solid-state electrolytes in lithium ion accumulators.