Nickel-Metal Hydride Battery

MH + NiOOH → M + Ni(OH)2

概述

NiMH batteries use a metal hydride anode (typically a rare earth/nickel alloy like AB₅ or AB₂) and nickel oxyhydroxide cathode in KOH electrolyte. Cell voltage is 1.2 V with energy density of 60–120 Wh/kg. They replaced NiCd batteries due to lack of toxic cadmium and higher capacity.

日常示例

Rechargeable AA batteries (Eneloop, etc.) and early hybrid cars like the Toyota Prius used NiMH technology.

工业重要性

NiMH电池为数百万辆混合动力汽车提供动力，丰田普锐斯从1997年到2015年持续采用NiMH技术，在过渡到锂离子电池之前是最成熟的车用储能方案。

属性

类型
Electrochemical
可逆
是
能量
放热
ΔH
-120.0 kJ/mol

相关反应

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Frequently Asked Questions

What is the equation for Nickel-Metal Hydride Battery?
The balanced equation is: MH + NiOOH → M + Ni(OH)₂.
What type of reaction is Nickel-Metal Hydride Battery?
Nickel-Metal Hydride Battery is a electrochemical reaction. It is reversible under certain conditions.
Is Nickel-Metal Hydride Battery exothermic or endothermic?
Nickel-Metal Hydride Battery is exothermic (releases energy). The enthalpy change (ΔH) is -120.0 kJ/mol.