Abstract: In a lithium ion secondary battery including a positive electrode, a separator, a negative electrode, and a package body, the negative electrode includes simple substance silicon as a negative electrode active material, and a negative electrode binder, and is doped with lithium, and the following formulas (1) and (2) are satisfied: 1.2?Ma/Mc?1.9??(1) 1.0<Ma/(Mc+MLi)<1.6??(2) wherein an amount of lithium inserted into the negative electrode until the negative electrode reaches a potential of 0.02 V with respect to metal lithium is Ma (a number of atoms), an amount of lithium released from the positive electrode until the positive electrode reaches a potential of 4.3 V with respect to metal lithium is Mc (a number of atoms), and an amount of lithium with which the negative electrode is doped is MLi (a number of atoms).

Abstract: There is provided a nonaqueous electrolyte secondary battery having high capacity in which the reduction in the capacity of the battery due to the irreversible capacity in the first charge and discharge is suppressed using a high capacity positive electrode.

Abstract: There is provided a polymer secondary battery using silicon and silicon oxide as a negative electrode active material that shows a high capacity retention rate also when a charge and discharge cycle is repeated. A polymer secondary battery including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a polymer-containing gel electrolyte, wherein the negative electrode includes silicon and silicon oxide as a negative electrode active material, and the polymer-containing gel electrolyte is present in voids formed by fine division of particles of the negative electrode active material.

Abstract: A nonaqueous electrolyte secondary battery according to a present exemplary embodiment comprises an electrode element including a positive electrode and a negative electrode arranged to face each other, a nonaqueous electrolyte and a jacket housing the electrode element and the nonaqueous electrolyte. The negative electrode is formed by bounding a negative electrode active material to a negative electrode collector with a negative electrode binder, the negative electrode active material containing (a) a carbon material capable of intercalating and deintercalating lithium ions, (b) a metal capable of forming an alloy with lithium and (c) a metal oxide capable of intercalating and deintercalating lithium ions. The nonaqueous electrolyte contains a nonaqueous solvent, a cyclic fluorinated carbonate and a linear fluorinated ether.

Abstract: A secondary battery according to the present exemplary embodiment is a secondary battery including a laminated electrode body provided with at least one pair of positive and negative electrodes and an outer enclosure that accommodates the laminated electrode body, wherein the outer enclosure includes one or more concave portions, inside a border corresponding to an outer edge of an electrode surface of an outermost layer of the laminated electrode body, on a surface facing the electrode surface, and wherein, when a band-shaped outer circumferential region having an area that is a half of an area inside the border is set inside the border, at least one of the concave portions is located inside the outer circumferential region.

Abstract: An exemplary embodiment provides a lithium ion secondary battery using a high energy type anode, which enables long-life operation thereof. A secondary battery according to an exemplary embodiment comprises an electrode element in which a cathode and an anode are oppositely disposed, an electrolytic solution, and an outer packaging body which encloses the electrode element and the electrolytic solution inside; wherein the anode is formed by binding an anode active material, which comprises carbon material (a) that can absorb and desorb a lithium ion, metal (b) that can be alloyed with lithium, and metal oxide (c) that can absorb and desorb a lithium ion, to an anode collector with an anode binder; and wherein the electrolytic solution comprises a liquid medium which is hard to generate carbon dioxide at a concentration of 10 to 80 vol %.

Abstract: An exemplary embodiment provides a lithium ion secondary battery using a high energy type anode, which enables long-life operation thereof. A secondary battery according to an exemplary embodiment comprises an electrode element in which a cathode and an anode are oppositely disposed, an electrolytic solution, and an outer packaging body which encloses the electrode element and the electrolytic solution inside; wherein the anode is formed by binding an anode active material, which comprises carbon material (a) that can absorb and desorb a lithium ion, metal (b) that can be alloyed with lithium, and metal oxide (c) that can absorb and desorb a lithium ion, to an anode collector with an anode binder; and wherein the electrolytic solution comprises a liquid medium which is hard to generate carbon dioxide at a concentration of 10 to 75 vol %.

Abstract: An exemplary embodiment of the invention provides a nonaqueous electrolytic solution secondary battery in which capacity deterioration associated with a charge/discharge cycle at a high temperature (45° C. or higher) can be prevented. An exemplary embodiment of the invention is a nonaqueous electrolytic solution secondary battery, comprising an electrode element in which a cathode and an anode are stacked, a nonaqueous electrolytic solution which contains at least one of carbonate solvent, and a gel in an outer packaging body; wherein the anode comprises a silicon oxide represented by SiOx (0<x?2) as an anode active material, and the gel comprises a cross-linked unsaturated carboxylate ester polymer and a carbonate solvent which is the same as at least one of the carbonate solvent contained in the nonaqueous electrolytic solution.

Abstract: A secondary battery includes an anode for a secondary battery, a cathode which absorbs and discharges lithium ions, and an electrolyte which is placed between the anode for the secondary battery and the cathode. The anode for the secondary battery includes an anode active material layer which absorbs and discharges lithium ions, the anode active material layer including a first layer including carbon as a chief ingredient, and a second layer including at least one first element having a theoretical capacity greater than a theoretical capacity of graphite, and at least one second element which has a theoretical capacity equal to or less than the theoretical capacity of graphite. The second layer includes particles, and the particles include the first element and the second element.

Abstract: There is provided a negative electrode for a nonaqueous electrolyte secondary battery in which when a battery is formed, the energy density is high, and moreover, the decrease in charge and discharge capacity is small even if charge and discharge are repeated. By using silicon oxide particles having a particle diameter in a particular range as a starting raw material, and heating these particles in the range of 850° C. to 1050° C., Si microcrystals are deposited on the surfaces of the particles. Then, by performing doping of Li, a structure comprising a plurality of protrusions having height and cross-sectional area in a particular range is formed on the surfaces. The average value of the height of the above protrusions is 2% to 19% of the average particle diameter of the above lithium-containing silicon oxide particles.

Abstract: Disclosed is a polyradical compound which can be used as an electrode active material for at least one of a positive electrode and a negative electrode. The polyradical compound has a repeating unit represented by general formula (1) and is crosslinked using a bifunctional crosslinking agent having two polymerizing groups in the molecule represented by general formula (2), wherein R1 to R3 each independently represent hydrogen or methyl group; R4 to R7 each independently represent C1 to C3 alkyl group; X represents single bond, linear, branched or cyclic C1 to C15 alkylenedioxy group, alkylene group, phenylenedioxy group, phenylene group or structure represented by general formula (3); and R8 to R13 each independently represent hydrogen or methyl group, and k represents an integer of 2 to 5.

Abstract: A secondary battery includes an anode for a secondary battery, a cathode which absorbs and discharges lithium ions, and an electrolyte which is placed between the anode for the secondary battery and the cathode. The anode for the secondary battery includes an anode active material layer which absorbs and discharges lithium ions, the anode active material layer including a first layer including carbon as a chief ingredient, and a second layer including at least one first element having a theoretical capacity greater than a theoretical capacity of graphite, and at least one second element which has a theoretical capacity equal to or less than the theoretical capacity of graphite. The second layer includes particles, and the particles include the first element and the second element.

Abstract: Since a first layer (a carbon layer 2a) whose chief ingredient is carbon and a second layer (Li absorbing layer 3a) containing particles having a theoretical capacity greater than that of graphite are formed on anode collector 1a, high capacity and high operation voltage can be realized. Since a element having a theoretical capacity equal to or less than that of graphite is added to the particles constituting this second layer, expansion and contraction of volume according to the charge and discharge are suppressed. This enables capacity deterioration to be suppressed even though cycles go on.

Abstract: A secondary battery is provided which has a high energy density, a high capacity, an excellent stability in charge-discharge cycle as well as an excellent safety. The secondary battery comprises at least a positive electrode, a negative electrode and an electrolyte, wherein an active material of at least one of the positive and negative electrodes includes at least one compound selected from the group consisting of radical compounds represented by the formula (1) or the formula (3): (in the formula (1), X1 and X2 each independently represent a group represented by the formula (3), alkoxyl group, halogen atom, hydroxyl group or cyano group, and R1˜R8 each independently represent hydrogen atom or alkyl group.) (in the formula (3), R10 represents alkyl group or substituted or unsubstituted phenyl group.

Abstract: An object of the present invention is to provide a battery which is high in capacity density and superior in stability. An electrode containing a compound having a diazine-N,N?-dioxide structure shown by a general formula (1) described below as an electrode active material is used, where x, y, x?, and y? independently shows integer numbers of 0 or more respectively, and the order of condensation of diazine rings and benzene rings may be alternate or random. One of substituents R1, R2, R3, R4, Ra, Rb, Rc, and Rd shows a part of main chain or side chain of oligomer or polymer, and the other independently shows hydrogen atom, halogen atom, or a specific group.

Abstract: To provide an RFID tag including therein a lightweight, thin, reusable by charging, and foldable power source. In an RFID tag including an IC module 2, an antenna 3, and a power source and with a thickness of 0.9 mm or less, there is included an organic radical battery with a thickness of 0.7 mm or less as the power source.

Abstract: An object of the present invention is to provide a power storage device with low internal resistance, employing a cathode containing a nitroxyl polymer. To attain the object in the present invention, in the power storage device employing a cathode comprising a nitroxyl polymer, a cathode collector having a conductive auxiliary layer comprising carbon as a main component formed and integrated on an aluminum electrode is used.

Abstract: An object of the present invention is to provide a power storage device with excellent cycle property, employing a cathode containing a nitroxyl polymer. To attain the object in the present invention, in the power storage device employing a cathode comprising a nitroxyl polymer, a lithium or lithium alloy anode is used as an anode active material and the cathode is in direct contact with the anode.

Abstract: In order to provide a positive electrode for a secondary battery having a low electric resistance and a large mechanical strength, and a secondary battery capable of charge and discharge using a large current and having a large capacity and excellent in storage characteristics, there is used a positive electrode for a secondary battery comprising an active material layer at least comprising a radical compound and a carbon fiber in which a graphite structure has an average value of interlayer distances d002 in the range of not less than 0.335 nm and not more than 0.340 nm. Such a carbon fiber having the interlayer distance has a modulus of elongation in the range of not less than 200 GPa and not more than 800 GPa. Particularly the carbon fiber preferably has a volume resistivity in the range of not less than 200??·cm and not more than 2000??·cm. The carbon fiber is preferably a vapor-grown carbon fiber or a graphitized carbon fiber derived from a mesophase pitch as a precursor.

Abstract: A battery, which has excellent safety in an overcharged state and is excellent in low-temperature characteristics and cycle characteristics, is provided. The electrolytic solution of the secondary battery contains a compound which has a diazine N,N?-dioxide structure represented by general formula (1). in which, n, m, n?, and m? each independently are an integer 0 or larger; the diazine rings and the benzene rings may be condensed alternately or randomly; and substituents R1, R2, R3, R4, Ra, Rb, Rc, and Rd each independently represent hydrogen atom, halogen atom, or specific group. However, when n is 2 or larger, then Ra and Rb may be the same or different, and when n? is 2 or larger, then Rc and Rd may be the same or different. In addition, these substituents, in cooperation with each other, may form a ring structure.