Abstract:
The secondary battery includes a cathode, an anode, and an electrolytic solution. The anode includes an anode current collector and an anode active material layer that includes an anode active material, and is provided on the anode current collector, a surface of the anode active material being covered with one or more coatings containing one or both of polyvinylidene fluoride and a copolymer of polyvinylidene fluoride.
Abstract:
Gas generation in a battery is suppressed, and high safety is realized. The battery is composed of a positive electrode in which a positive electrode active material layer including a positive electrode active material is formed on a positive electrode collector, a negative electrode in which a negative electrode active material layer including a negative electrode active material is formed on a negative electrode collector, a separator provided between the positive electrode and the negative electrode, and an electrolyte impregnated in the separator; and includes a heteropoly acid and/or heteropoly acid compound as an additive at least in one of the positive electrode, the negative electrode, the separator, and the electrolyte.
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.