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Secondary Cells

Why does anod...

Question

Why does anode material have good hydrogen storage capacity for a Nickel-metal hydride battery?

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Solution

The negative electrode reaction occurring in a NiMH cell is

$H_{2} O + M + e^{-} ⇌ O H^{-} + M H$
The charge reaction is read left-to-right and the discharge reaction is read right-to-left.
Hydrogen is most important for this reaction
So anode material have good hydrogen storage capacity for a Nickel-metal hydride battery

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