Abstract: The present invention provides a binder for positive electrode of lithium ion battery which is excellent in workability at the time of producing a positive electrode, is excellent in charge and discharge characteristics such as cycle characteristics and rate characteristics, and enables to possible to produce a positive electrode having an extended cycle life, as well as the present invention provides a slurry for forming positive electrode mixture layer of lithium ion battery, a positive electrode for lithium ion battery, and a lithium ion battery, using the same.

Abstract: An electrolyte solution for a potassium ion battery or a potassium ion capacitor, the electrolyte solution comprising at least one potassium salt compound selected from the group consisting of potassium bis(trifluoromethanesulfonyl)amide and potassium bis(fluorosulfonyl)amide and at least one solvent selected from the group consisting of ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, pentaethylene glycol dimethyl ether, ethylene carbonate, and propylene carbonate, in which a concentration of the potassium salt compound in the electrolyte solution is from 1.5 mol/kg to 12.0 mol/kg.

Abstract: An electrolyte solution for a potassium ion battery or a potassium ion capacitor, the electrolyte solution comprising at least one potassium salt compound selected from the group consisting of potassium bis(trifluoromethanesulfonyl)amide and potassium bis(fluorosulfonyl)amide and at least one solvent selected from the group consisting of ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, pentaethylene glycol dimethyl ether, ethylene carbonate, and propylene carbonate, in which a concentration of the potassium salt compound in the electrolyte solution is from 1.5 mol/kg to 12.0 mol/kg.

Abstract: Provided is the positive electrode active material for a potassium ion battery according to the embodiment comprises a compound represented by Formula (1), in which M represents at least one element selected from the group consisting of V, Fe, Co, Ni, and Mn, and x represents a number from 0 to 1; and is a positive electrode for a potassium ion battery comprising the positive electrode active material for a potassium ion battery according to the embodiment, or a potassium ion battery comprising the positive electrode for a potassium ion battery. KMOxPO4F1-x??[Formula (1)].

Abstract: It is an object of the present invention to provide an electrode capable of maintaining superior capacity retention without destruction of an electrode structure, even in the case of using an active material including silicon.

Abstract: It is an object of the present invention to provide an electrode having superior charge-discharge capacity, even in the case of using an active material containing silicon.

Abstract: The present invention relates to an active cathode material of the general formula (I): MxNia-yM1bM2cM3yO2, in which the variables are each defined as follows: M is an alkali metal, M1 is V, Cr, Mn, Fe, Co or a mixture thereof, M2 is Ge, Sn, Ti, Zr or a mixture thereof, M3 is Mg, Zn, Cu or a mixture thereof, x is in the range from 0.5 to 0.8, a is in the range from 0.1 to 0.4, b is in the range from 0.05 to 0.7, c is in the range from 0.02 to 0.6, y is in the range from 0.05 to 0.2 wherein a+b+c=1. The present invention further relates to an electrode material comprising said active cathode material, to electrodes produced from or using said electrode material and to a rechargeable electrochemical cell comprising at least one electrode. The present invention further relates to a process for preparing said active cathode material of the general formula (I).

Abstract: Provided are: a potassium ion secondary battery which is not susceptible to deterioration of charge/discharge capacity even if charging and discharging are repeated, and which has a long service life as a secondary battery; a potassium ion capacitor; a negative electrode for the potassium ion secondary battery; and a negative electrode for the potassium ion capacitor. A negative electrode for potassium ion secondary batteries and a negative electrode for potassium ion capacitors, each of which contains a carbon material that is capable of absorbing and desorbing potassium and a binder that contains a polycarboxylic acid and/or a salt thereof. A potassium ion secondary battery which is provided with the negative electrode or the capacitor. A binder for negative electrodes of potassium ion secondary batteries or negative electrodes of potassium ion capacitors, which contains a polycarboxylic acid and/or a salt thereof.

Abstract: A positive electrode-active material is provided for use in a positive electrode for a sodium secondary cell and a sodium secondary cell. Also provided is a positive electrode for a sodium secondary cell and a sodium secondary cell having a high energy density. The positive electrode-active material for a sodium secondary cell includes a composite metal oxide, which has an ?-NaFeO2 type crystal structure and is denoted by Formula (1) described below: Naa(FewNixMny-zTiz)O2??(1), wherein a is greater than or equal to 0.6 and less than or equal to 1.0, w is greater than 0 and less than 0.5, x is greater than 0 and less than 0.5, y is greater than 0.03 and less than or equal to 0.5, z is greater than or equal to 0.03 and less than 0.5, and w+x+y=1.0, and y>z.

Abstract: A sodium transition metal based cathode material for a rechargeable sodium battery, having a P2 orthorhombic layered bronze crystal structure with space group Cmcm, and having a composition NaxMyMn1-yLiy?AzO2 with 0.60<x<0.95, wherein M consists of either one or more elements of the group consisting of Cu, Zn and Ni; A consisting of either one or more elements of the group consisting of Mg, Ti, Fe, Cr and Co, with 0<y<0.20, 0?z<0.2, 0?y?<0.33, and z+y?>0.

Abstract: Provided is the positive electrode active material for a potassium ion battery according to the embodiment comprises a compound represented by Formula (1), in which M represents at least one element selected from the group consisting of V, Fe, Co, Ni, and Mn, and x represents a number from 0 to 1; and is a positive electrode for a potassium ion battery comprising the positive electrode active material for a potassium ion battery according to the embodiment, or a potassium ion battery comprising the positive electrode for a potassium ion battery.

Abstract: A sodium transition metal cathode material for a rechargeable sodium battery having a P2 layered bronze crystal structure, comprising at least 55 mol % manganese, wherein the manganese valence state is at least 3.75. The material undergoes a structural transformation to a secondary cathode material by extraction of sodium during the 1st charge of a rechargeable sodium battery comprising the sodium cathode material. The material has either a composition NaxMO2 where M=Mn1-y-zLiyAz where z<0.2 and y<0.33 and 0.66<x<0.95, and wherein A consists of either one of more elements of the group Ti, Fe, Ni, Mg and Co, or a composition NaxMO2 where M=LiaMn1-a-b-cMgbAc where 0<a<0.2, c<0.2 and 0.2<a+b<0.46 and 0.66<x<0.95, and wherein A consists of either one of more elements of the group Ti, Fe, Ni and Co.

Abstract: Provided is a novel lithium complex oxide containing molybdenum. A complex oxide represented by the following compositional formula: LixMyMozO wherein M is one or two or more selected from the group consisting of Mn, Ru, Sn, Mg, Al, Ti, V, Cr, Fe, Co, Ni, Cu, and Zn; x is in the range of 0.60 to 0.75; y is in the range of 0.15 to 0.25; and z is in the range of 0.075 to 0.20.

Abstract: It is an object of the present invention to provide an electrode capable of maintaining superior capacity retention without destruction of an electrode structure, even in the case of using an active material including silicon.

Abstract: A sodium transition metal based cathode material for a rechargeable sodium battery, having a P2 orthorhombic layered bronze crystal structure with space group Cmcm, and having a composition NaxMyMn1-yLiy?AzO2 with 0.60<x<0.95, wherein M consists of either one or more elements of the group consisting of Cu, Zn and Ni; A consisting of either one or more elements of the group consisting of Mg, Ti, Fe, Cr and Co, with 0<y<0.20, 0?z<0.2, 0<y?<0.33, and z+y?>0.

Abstract: It is an object of the present invention to provide an electrode capable of maintaining superior capacity retention without destruction of an electrode structure, even in the case of using an active material including silicon.

Abstract: Provided are: a potassium ion secondary battery which is not susceptible to deterioration of charge/discharge capacity even if charging and discharging are repeated, and which has a long service life as a secondary battery; a potassium ion capacitor; a negative electrode for the potassium ion secondary battery; and a negative electrode for the potassium ion capacitor. A negative electrode for potassium ion secondary batteries and a negative electrode for potassium ion capacitors, each of which contains a carbon material that is capable of absorbing and desorbing potassium and a binder that contains a polycarboxylic acid and/or a salt thereof. A potassium ion secondary battery which is provided with the negative electrode or the capacitor. A binder for negative electrodes of potassium ion secondary batteries or negative electrodes of potassium ion capacitors, which contains a polycarboxylic acid and/or a salt thereof.

Abstract: The present invention relates to an active cathode material of the general formula (I): MxN iaM1bM2cO2 (I) in which the variables are each defined as follows: M is an alkali metal, M1 is V, Cr, Mn, Fe or Co, M2 is Ge, Sn, Ti or Zr, x is in the range from 0.5 to 0.8, a is in the range from 0.1 to 0.4, b is in the range from 0.05 to 0.6, c is in the range from 0.05 to 0.6, wherein a+b+c=1. The present invention further relates to an electrode material comprising said active cathode material, to electrodes produced from or using said electrode material and to a rechargeable electrochemical cell comprising at least one electrode. The present invention further relates to a process for preparing said active cathode material of the general formula (I).

Abstract: An active material for a nonaqueous electrolyte energy storage device contains a lithium-transition metal composite oxide having a crystal structure attributable to space group Fm-3m and represented by the compositional formula (1): Li1+xNbyMezApO2??(1) wherein Me is a transition metal including Fe and/or Mn, 0<x<1, 0<y<0.5, 0.25?z<1, A is an element other than Nb and Me, and 0?p?0.2.

Abstract: It is an object of the present invention to provide an electrode having superior charge-discharge capacity, even in the case of using an active material containing silicon.