NiMHZellen
NiMHZellen (Nickel‑Mikrofluss‑Lose‑Ryzen‑Zellen) are secondary electrochemical cells that employ nickel oxide hydroxide as the positive electrode, hydrogen‑ion conducting electrolyte and a hydrogen‑rich negative electrode, usually a nickel‑metal hydride alloy. The chemical reactions during discharge and charge are reversible, permitting repeated use of the same cell. NiMH technology emerged in the early 1990s as a commercial successor to nickel‑cadmium (NiCd) batteries and has since become widespread in portable electronic devices, cordless tools and hybrid vehicles.
During discharge the nickel oxide hydroxide is reduced to nickel hydroxide while the hydrogen‑rich alloy releases
Key advantages of NiMH cells include a higher energy density than NiCd, absence of toxic cadmium, reduced
In comparison to lithium‑ion chemistries, NiMH offers lower cost and simpler safety profiles but suffers from