Brief introduction to the layout and rationale of Ni-MH batteries

Ni-MH battery is a kind of excellent storage battery. Ni-MH batteries are divided into high-voltage nickel-hydrogen batteries and low-voltage nickel-hydrogen batteries. The positive electrode active material of the nickel-hydrogen battery is Ni(OH)2 (called NiO electrode), the negative electrode active material is metal hydride, also called hydrogen storage alloy (the electrode is called hydrogen storage electrode), and the electrolyte is 6mol/L potassium hydroxide solution. As an important bias in the application of hydrogen energy, nickel-hydrogen batteries have attracted more and more attention. Layout and rationale The positive active material of nickel-hydrogen battery is Ni(OH)2 (called NiO electrode), the negative active material is metal hydride, also called hydrogen storage alloy (electrode is called hydrogen storage electrode), and the electrolyte is 6mol/L hydroxide Potassium solution. The process methods for the active material to form the electrode pads are mainly sintered, drawn, foamed nickel, fiber nickel, and embedded, etc. The electrodes prepared by different processes have big differences in capacity and high-voltage motor performance. Generally, batteries are produced according to different processes in use conditions. Most of the civilian batteries for communications, etc., are recycled to form a slurry-type negative electrode and a foamed nickel positive electrode. The chemical reverberation of charge and discharge is as follows: positive electrode: Ni(OH)2+OH-u003dNiOOH+H2O+e- negative electrode: M+H2O+e-u003dMHab+OH-total reverberation: Ni(OH)2+Mu003dNiOOH+MH Note: M: hydrogen alloy; Hab: adsorbed hydrogen; the reverberant process from left to right is the charging process; the reverberant process from right to left is the discharge process. When charging, the positive electrode's Ni(OH)2 and OH- reverberate to generate NiOOH and H2O, and at the same time release e- to generate MH and OH- together. The total reverberation is Ni(OH)2 and M to generate NiOOH, hydrogen storage alloy stores hydrogen; discharge On the contrary, MHab released H+, statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous article: What are the basic precautions for lithium ion battery charging?