Nickel-metal hydride battery electrolyte is mainly KOH as electrolyte (electrolyte 7moL\/L KOH 15g\/L LiOH)
Nickel-metal hydride battery when charging
Positive reaction: Ni(OH)2 OH-→NiOOH H2O e-
Negative reaction: M H20 e-→MH OH-
Total reaction: M Ni(OH)2→MH NiOOH
Nickel-metal hydride battery discharge
Positive electrode: NiOOH H2O e-→Ni(OH)2 OH-
Negative electrode: MH OH-→M H2O e-
Total reaction: MH NiOOH→M Ni(OH)2