Coulombic Efficiency

For a rechargeable battery the fraction of the electrical charge stored during charging that is recoverable during discharge.

This is sometimes referred to as Ampere-hour Efficiency.

The coulometric efficiency is always larger than the energy efficiency.

Coulombic Efficiency
Lead Acid0.70-0.84
Lithium Ion0.85-0.95
Nickel Cadmium0.65-0.85
Nickel Metal Hydride0.65-0.85
Polysulfide Bromide0.60-0.65
Vanadium Redox0.60-0.80
Zinc Bromide0.60-0.73


Carl Johan Rydh, Bjorn A. Sanden, "Energy analysis of batteries in photovoltaic systems. Part I: Performance and energy requirements", Energy Conversion and Management 46 (2005) 1957-1979

See also: Battery, Battery Efficiency, Voltaic Efficiency.

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Subjects: Chemistry