| 摘要 |
Provided is a battery, comprising a positive electrode, a negative electrode and an electrolytic solution. The positive electrode comprises a positive electrode current collector and a coating formed on the positive electrode current collector, the coating at least comprises a positive electrode active substance which participates in the positive electrode reaction, and the positive electrode active substance can reversibly de-intercalate an inserted ion; the negative electrode at least comprises a negative electrode current collector; and the electrolyte solution comprises a solvent and an electrolyte, wherein the solvent is selected from water or alcohol, and the electrolyte can at least ionize an active ion which performs reduction-deposition and oxidation-dissolving in the negative electrode in the charging or discharging process. The areal density range of the positive electrode active substance in the coating is 100-3000 g/m2. The battery provided in the present invention has an excellent electrochemical performance, a higher energy density, and a good cycle performance. The operation of the battery is secure, and the production cost thereof is low. |
