Secondary battery, battery pack, vehicle, and stationary power supply
摘要
說明書
The negative electrode can be obtained by, for example, the following method. First, the active material, the conductive agent, and the binder are suspended in an appropriate solvent to prepare a slurry. Next, the slurry is applied to one surface or both surfaces of the current collector. The coating on the current collector is dried, thereby forming an active material-containing layer. After that, pressing is performed for the current collector and the active material-containing layer formed on it. As the active material-containing layer, the mixture of the active material, the conductive agent, and the binder formed into pellets may be used.
2) Positive Electrode
The positive electrode can include a positive electrode current collector and a positive electrode active material-containing layer supported on the positive electrode current collector.
The positive electrode current collector is made of, for example, a metal such as stainless steel, aluminum (Al), or titanium (Ti). The positive electrode current collector has a form of, for example, a foil, a porous body, or a mesh. To prevent corrosion by the reaction between the positive electrode current collector and the aqueous electrolyte, the surface of the positive electrode current collector may be covered with a different kind of element. The positive electrode current collector is preferably made of a material with excellent corrosion resistance and oxidation resistance, for example, a Ti foil. Note that when Li2SO4 is used as the aqueous electrolyte, Al may be used as the positive electrode current collector because corrosion does not progress.
