QCG-X graphite
93.3% first-cycle efficiency · 352 mAh/g reversible capacity
Four-cycle data shows capacity near the expected range for high-quality graphite and closely grouped cycle profiles.
Why ON Cell
Reduce test-cell uncertainty so material performance is easier to see.
Half-cell data is only useful when the construction is controlled well enough to separate material behavior from assembly variation.
The problem
Coin cells are simple in appearance—not in execution.
Small changes in pressure, alignment, lithium condition, hardware, electrode preparation, and assembly technique can produce meaningful differences in electrochemical results.
ON Cell Technologies was built around systematically reducing those uncontrolled variables. The construction process was refined through hundreds of combinations and repeated trials before being standardized for customer testing.
Representative validation data
High-performing graphite half-cells with strong cycle overlap.
The examples below are representative internal development tests using QCG-X and FSN1 graphite materials.
FSN1 graphite
94.6% first-cycle efficiency · 341 mAh/g reversible capacity
Representative cycling demonstrates high first-cycle efficiency and stable reversible capacity across the standard test sequence.
Representative development results. Performance varies with material, electrode quality, and test conditions.
What the process is designed to deliver
Precision, consistency, and transparent reporting.
Controlled construction
Hardware and assembly variables remain standardized so the electrode material is the primary experimental variable.
Replicate-first testing
Every material begins with three or more cells so agreement and outliers are visible rather than hidden behind a single result.
Complete reporting
Valid cells, outliers, shorts, and failures are documented. Assembly-related failures are replaced; material-related failures remain part of the result.
Independent confirmation
Useful whether you already build coin cells or not.
For teams without internal half-cell capability, ON Cell provides a direct path from coated electrode to data. For teams with an established lab, it provides an independent comparison against a specialized construction process.
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Three or more replicate cellsReproducibility is considered from the start of the project.
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Research-ready outputsProcessed figures, calculated values, and raw cycler files are delivered together.
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Confidential by defaultNDAs are available before proprietary material information is exchanged.
Focused specialization
Built around the half-cell testing problem.
ON Cell Technologies began with focused research into improving lithium half-cell consistency. The procedure was developed by evaluating construction variables, comparing electrochemical outcomes, and refining the process around the strongest-performing configurations.
Initial testing is conducted in collaboration with Coulometrics in Chattanooga, Tennessee.
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