Explanation

An alkaline secondary accumulator takes nickel hydroxide as the positive electrode and metal iron as the negative electrode. Potassium hydroxide aqueous solution is the electrolyte. The rated voltage of monomer battery is 1.4V. The main advantages of nickel-iron battery are low cost, abundant raw materials, long cycle life, low maintenance cost, resistance to harsh environmental use and environmental friendliness, but the battery charging and discharging process is slow. The low battery retention rate and other shortcomings have not been widely applied. In recent years. The researchers composition the production process of iron and nickel hydroxide electrodes with new technologies such as graphene and carbon nanotube. Effectively improved electrode process dynamics. Shortened charging and discharging time, completing charging in 2 minutes. The discharge is completed in 30s, and the energy density of the battery reaches 120W-h/kg. After 800 cycles, the capacity retention rate reaches 80%, showing a good application prospect.

Classification