How advanced is alkaline battery technology to date

Rechargeable alkaline zinc-manganese battery An improved alkaline zinc-manganese battery that can be reused by charging, referred to as RAM. The structure and manufacturing process of this battery are basically the same as those of alkaline zinc-manganese batteries.
In order to achieve rechargeable, the battery is improved on the basis of alkaline zinc-manganese batteries: ① improve the structure of the positive electrode, increase the strength of the positive electrode ring or add additives such as binders to prevent the positive electrode from swelling during charging and discharging; ② through the positive electrode Doping to improve the reversibility of manganese dioxide; ③ Control the amount of zinc active material anode, control manganese dioxide can only be discharged with 1 electron; ④ Improve the isolation layer to prevent zinc dendrites from penetrating the isolation layer when the battery is charged and short circuit .
The charge-discharge cycle performance of the rechargeable alkaline zinc-manganese battery is inferior to that of the traditional secondary battery, and the charge-discharge system has a great influence on the cycle life of the battery. At present, the full charge and discharge cycle life is only about 50 times. Do not over discharge when using this type of battery. Shallow discharge can greatly increase the battery's cycle life. The discharge reaction of the battery is the same as that of the alkaline zinc-manganese primary battery.
Due to the short cycle life of the battery and limited development, there are only a few companies in the United States and Canada that produce it on a large scale. China also produces such batteries, but the production and export volume are small.