Cyclers for UHPC

Ultra-high-precision coulometry needs more than an ordinary cycler. Because coulombic efficiency sits close to 1, the instrument's current accuracy, noise, and long-term stability must be roughly an order of magnitude better than the effect being measured — see Measurement & precision.

What makes a cycler UHPC-capable

• Current accuracy against full scale (FSR) tight enough that the fixed guardrail stays small next to the parasitic current.
• Low noise and drift, so a few-ppm change in CE is not buried.
• Temperature control, because current sensing has a temperature coefficient and drift contaminates the reading.
• Channel-to-channel consistency, which charge-endpoint slippage — unlike capacity fade — depends on.

Instruments (alphabetical)

The main equipment providers for high-precision coulometry. Specifications vary by current range and configuration — confirm against the manufacturer's current datasheet before comparing.

Biologic

A long-standing maker of potentiostats and battery cyclers with high-accuracy current ranges and built-in electrochemical impedance spectroscopy, used for coin-cell and small-format high-precision work.

Norbert

A multi-channel high-precision cycling system that pairs low-noise acquisition with temperature-chamber integration and parallel EIS, aimed at research-scale coulometry.

Novonix

A commercialised high-precision coulometry platform that grew out of the academic UHPC work on coulombic-efficiency measurement.

How to compare fairly

• Compare measurable specs: resolution, accuracy (% FSR), noise, temperature-control tolerances.
• Match the current range to the cell: small ranges for electrode/material studies, larger ranges for full cells.
• Only same-condition tests on the same cells are comparable.

Precision figures come from the datasheet.