Abstract:
An electric storage device includes: a positive electrode; a negative electrode; and a separator placed between the positive electrode and the negative electrode. The positive electrode includes a positive electrode substrate, a positive active material layer formed on the positive electrode substrate, and a protective layer that covers at least one of side surfaces in a width direction of the positive active material layer. The negative electrode includes a negative electrode substrate and a negative active material layer formed on the negative electrode substrate. The separator includes a separator substrate opposed to the negative active material layer, and an inorganic layer containing a binder, the inorganic layer formed on the separator substrate and opposed to the positive active material layer.
Abstract:
An energy storage unit having plural energy storage devices, each of which includes a container housing an electrode assembly and positive and negative electrode terminals electrically connected to the electrode assembly and extending from the container in the same direction, includes: a bus bar electrically connecting a first terminal, which is one of the positive electrode terminal and the negative electrode terminal of a first energy storage device included in the plural energy storage devices, and a second terminal, which is one of the positive electrode terminal and the negative electrode terminal of a second energy storage device included in the plural energy storage devices and opposite in polarity to the first terminal; a packing member interposed between the first terminal and the container of the first energy storage device; and an insulating member interposed between the bus bar and the container of the first energy storage device.
Abstract:
An energy storage device including a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the negative electrode includes non-graphitizable carbon as a negative electrode active material, and the separator has a thickness of 10 to 30 μm and an air permeability of 10 to 180 sec/100 cc.
Abstract:
An energy storage element, wherein a non-aqueous electrolyte contains lithium difluorobis(oxalato)phosphate that is a first additive represented by Formula (1): and lithium tetrafluorooxalatophosphate that is a second additive represented by Formula (2): wherein the amount of the first additive to be added is not less than 0.3% by weight and not more than 1.0% by weight based on the total weight of the non-aqueous electrolyte, and the amount of the second additive to be added is not less than 0.05 times and not more than 0.3 times the amount of the first additive to be added.