Secondary battery, battery pack, vehicle, and stationary power supply
摘要
說明書
The positive 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.
3) Separator
The separator has electrical insulating properties and prevents the negative electrode and the positive electrode from being in contact with each other to cause internal short circuit. The separator is located at least between the positive electrode and the negative electrode. The separator is preferably in contact with the negative electrode, and more preferably in contact with both the positive electrode and the negative electrode. The separator is preferably located to cover the main surface of the negative electrode. In addition, the separator preferably covers one or more side surfaces as well in addition to the main surface of the negative electrode. When such an arrangement is employed, in the secondary battery, the negative electrode side and the positive electrode side can be more correctly spaced apart, and electrolysis of water can further be suppressed. Note that the secondary battery according to the first embodiment may include a plurality of separators. In this case, the negative electrode and the positive electrode can be located between the separators.
