Abstract:
PROBLEM TO BE SOLVED: To suppress decomposition of an electrolyte near a positive electrode under a high temperature environment.SOLUTION: A battery comprises a positive electrode and an electrolyte, and a phosphorus compound having a P-OH structure is added to at least one of the positive electrode and the electrolyte. As a result of the addition of the phosphorus compound, a protective coating film containing, as a main component, at least one of phosphate derived from the phosphorus compound having the P-OH structure and a metal salt of its derivative is formed on the surface of at least one of the positive electrode and a positive electrode active material as the battery is charged and discharged. The addition of the phosphorus compound having the P-OH structure is particularly effective in a battery which contains, as a negative electrode active material, a lithium transition metal compound having a Spinel structure. The electrolyte is preferably held by a polymer material, thereby making an illiquid electrolyte. This electrolyte is particularly effective in application to a battery having positive and negative electrodes and an electrolyte sheathed by a laminate film.
Abstract:
PROBLEM TO BE SOLVED: To suppress decomposition of an electrolyte under a high temperature environment.SOLUTION: A battery comprises an electrolyte containing: a solvent; an electrolytic salt; and an additive agent which is decomposed at a counter electrode lithium potential of 1.6 to 2.5 V to form a coating film on the negative electrode. The electrolyte is particularly effective in the case of using a negative electrode active material whose potential in a fully charged condition is 1.0 to 1.6 V in terms of the counter electrode lithium potential. The additive agent preferably contains a cyclic carboxylic acid anhydride. The electrolyte preferably contains 0.1 to 1.0 mass% of the cyclic carboxylic acid. The electrolyte is preferably held by a polymer material, thereby making an illiquid electrolyte. This electrolyte is particularly effective in application to a battery having positive and negative electrodes and an electrolyte sheathed by a laminate film.
Abstract:
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte battery improving charge-discharge cycle characteristics and suppressing gas evolution in high temperature storage, and to provide a nonaqueous electrolyte.SOLUTION: The nonaqueous electrolyte battery includes a positive electrode, a negative electrode, and the nonaqueous electrolyte containing a solvent and an electrolyte salt. The nonaqueous electrolyte contains the solvent and the electrolyte salt, and the solvent contains a halogenated cyclic carbonate or an unsaturated cyclic carbonate. A polyacid and/or a polyacid compound are/is contained in the battery. In order to obtain gas generation-suppressing effect even at high charging voltage, the polyacid and/or the polyacid compound, and the halogenated cyclic carbonate such as 4-chloro-1,3-dioxolane-2-on are contained in the battery.
Abstract:
PROBLEM TO BE SOLVED: To provide a negative electrode in which swelling-suppression effect during storage under a high temperature can be demonstrated sufficiently, a non-aqueous electrolyte secondary battery, and a manufacturing method of the non-aqueous electrolyte secondary battery. SOLUTION: The negative electrode 21 has a negative electrode current collector 21A and a negative electrode active material layer 21B that covers at least one of the main faces of the negative electrode current collector 21A and contains at least a negative electrode active material 211. The negative electrode active material 211 contained in a region from the surface of the negative electrode active material layer 21B up to at least 50% thickness is the negative electrode active material 213 with a film having the solid electrolyte film. The solid electrolyte film contains a product formed by cross-linking reaction of isocyanate groups of isocyanate compounds. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte battery capable of effectively restraining battery expansion at the time of storage at high temperature on the battery where lithium composite oxide with high nickel contents is used as a positive electrode active material. SOLUTION: An electrolyte is impregnated in a separator 15. The electrolyte includes, for example, a solvent and electrolyte salt dissolved in the solvent. The solvent formed by a nonaqueous solvent contains cyclic pyrrolidone derivative such as 1-methyl-2-pyrrolidone. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte battery capable of restraining an battery expansion at the time of storage at high temperature in spite of the battery at a high discharging state of ≥4.30 volts. SOLUTION: An electrolyte is impregnated into a separator 15. The electrolyte includes, for example, a solvent and electrolyte salt dissolved in the solvent. The solvent formed by a nonaqueous solvent contains cyclic pyrrolidone derivative such as 1-methyl-2-pyrrolidone. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a non-aqueous electrolytic liquid capable of improving charge and discharge efficiency while suppressing thermal expansion under a high-temperature environment, and a non-aqueous secondary battery. SOLUTION: This is a non-aqueous electrolytic liquid secondary battery having a positive electrode, a negative electrode as well as a non-aqueous electrolytic liquid, and the non-aqueous electrolytic liquid contains a halogenated cyclocarbonyl compound of any of formulae (1)-(4). COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte battery with its swelling restrained at high-temperature storage. SOLUTION: In the nonaqueous electrolyte battery provided with electrolyte solution together with a cathode and an anode, the electrolyte solution contains chlorine-substituted carboxylate expressed in formula (1). In the formula (1), Y, Z are C m H 2m+1-n X n (0≤m≤4, 0≤n≤2m+1, X is at least either F, Cl, or Br), and M is either one out of Li, Na, K, Rb, Cs, Ag, 1/2Be, 1/2Mg, and 1/2Ca, 1/2Sr, 1/2Ba, 1/2Zn, 1/2Cd, 1/2Hg, 1/2Sn, 1/2Pb. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte composition capable of suppressing swelling of a battery housing in a high temperature storage without adding divinyl sulfone, and a nonaqueous electrolyte secondary battery using such a nonaqueous electrolyte composition. SOLUTION: By adding electrolyte salt, cyclic carboxylic acid ester such as γ-butyrolactone, and halogenated cyclic carbonate such as fluoroethylene carbonate in a nonaqueous solvent so that the content in the nonaqueous solvent becomes 0.1% or more and less than 1% and 0.5% or more and less than 5% by weight ratio respectively, the nonaqueous electrolyte composition is made and by using such a nonaqueous electrolyte composition, the nonaqueous electrolyte secondary battery is obtained. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide electrolyte solution capable of improving battery characteristics even at high temperature, and a battery using the same. SOLUTION: A separator 23 has the electrolyte solution impregnated. The electrolyte solution contains cyclic imide salt such as 1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide lithium, and light metal salt such as difluoro[oxolato-O,O'] boric acid or bis[oxolato-O,O'] boric acid. COPYRIGHT: (C)2008,JPO&INPIT