Abstract: A battery comprising a housing, a battery cell, a thermal strain elastic component, and an electric-conductor is provided. The battery cell, the thermal strain elastic component, and the electric-conductor are disposed inside the housing. When a temperature of the battery cell is less than a threshold, the electric-conductor is electrically connected to the housing. When the temperature of the battery cell is greater than or equal to the threshold, the thermal strain elastic component is deformed, so that the electric-conductor is separated from the housing. An overheat structure formed by the housing, the battery cell, the thermal strain elastic component, and the electric-conductor is disposed at a tab inside the housing. A heat transfer path between the foregoing protection structure and a region with a highest temperature in the battery is short, and the foregoing protection structure is directly connected to a current collector in the battery cell.

Abstract: The disclosure discloses electrode material, preparation methods thereof and supercapacitors based thereof. Raw material for preparing the electrode material include PVDF and an additive which can be reacted with the PVDF to generate conductive active substance, the amount of the PVDF is 50 to 99 mass percentage, and the amount of the additive is 1 to 50 mass percentage. A PVDF-based composite film can be prepared from the raw materials; and activating treatment is performed on the film by virtue of a physico-chemical process, so that PVDF can generate a conductive active substance, the contact resistance of the PVDF and the active substance is reduced, and the conductive active substance is distributed in the PVDF-based composite film more uniformly. Button and wound supercapacitor and flexible capacitor, which are prepared from the electrode material, are high in power density and energy density, long in cycle life.

Abstract: The disclosure discloses electrode material, preparation methods thereof and supercapacitors based thereof. Raw material for preparing the electrode material include PVDF and an additive which can be reacted with the PVDF to generate conductive active substance, the amount of the PVDF is 50 to 99 mass percentage, and the amount of the additive is 1 to 50 mass percentage. A PVDF-based composite film can be prepared from the raw materials; and activating treatment is performed on the film by virtue of a physico-chemical process, so that PVDF can generate a conductive active substance, the contact resistance of the PVDF and the active substance is reduced, and the conductive active substance is distributed in the PVDF-based composite film more uniformly. Button and wound supercapacitor and flexible capacitor, which are prepared from the electrode material, are high in power density and energy density, long in cycle life.