Chronopotentiometry

Example

Use in Lemonergy

Record specimen, state, instrument, temperature and timing.

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Connected concepts

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Chronoamperometry

Stepping an electrode to a fixed potential and recording how the current decays with time. A diffusion-limited current falls with the inverse square root of time, the Cottrell relation, which yields diffusion coefficients; long holds measure leakage currents from electrolyte oxidation or self-discharge, and a staircase of small steps is PITT.

Concentration polarization

Voltage loss that arises when reactant is consumed faster than diffusion can replace it, so the concentration at the surface differs from the bulk. It dominates at high current and low temperature and recovers slowly when current stops.

Constant current

A charge or discharge at a fixed current, so capacity is simply current times time. It is the first stage of a CC-CV charge and the normal way to run a capacity test.

Dendrite

A tree-like metal deposit that can grow from the negative electrode through the separator, raising self-discharge or causing an internal short circuit.

Galvanostatic intermittent titration technique

A series of short constant-current pulses each followed by a long rest, so that both the equilibrium voltage curve and the solid diffusion coefficient can be extracted at each state of charge. It is slow, often days per cell, and a staple of parameterisation.

References & further reading

Further reading on this topic

These sources provide broader context; they are not presented as citations for every statement in this entry.

1. Battery Test Manual For Electric Vehicles, Revision 3

   Jon P. Christopherson · Idaho National Laboratory · 2015

   Topic background · Performance characterization, pulse resistance/power, life testing and reference performance tests; historical 2015 edition.