This NCM811 dataset is more useful as a process comparison than as a simple capacity announcement. The standard NCM811 electrode at 12 mg/cm2 reports 210.34 mAh/g and 88.58% first-cycle efficiency. The 30 mg/cm2 dry electrode reports 216.99 mAh/g and 92.41% first-cycle efficiency. In other words, the stated loading rises 2.5 times, while the reported gravimetric capacity stays within about 3.2% of the lower-loading sample. That makes the dry electrode the main engineering question: can higher active-material loading be gained without sacrificing accessible cathode capacity?
The Comparison Is About Process, Not Just Material
Both panels use the same NCM811 cathode family, lithium-metal counter electrode, 2.5-4.3 V window, 0.1C/0.1C rate, and 25 +/- 1 C test temperature. The visible difference in the source figure is the electrode format and loading: NCM811-S01 is the standard 12 mg/cm2 condition, while NCM811-S03 is identified as a dry electrode at 30 mg/cm2. This gives the article a practical selection question: when should a research team move from a conventional coating baseline to a dry high-loading trial?
A ready-to-test lithium-ion cathode electrode sheet is useful here because the comparison depends on more than powder identity. Loading basis, collector, coating thickness, density, dry-process architecture, and wetting all affect how much of the NCM811 active material can be accessed in a coin cell.
What the Two Curves Actually Show
The dry S03 electrode does not merely retain capacity; it also reports a higher first-cycle efficiency than the standard S01 electrode. The reported gravimetric difference is 6.65 mAh/g, or about 3.16% relative to S01. If the stated loading is an active-material basis, the estimated areal capacity rises from about 2.52 mAh/cm2 to about 6.51 mAh/cm2, an increase of roughly 158%. These are calculated engineering estimates and should be confirmed against the actual formulation and mass basis before full-cell balancing.
| Sample | Process / loading | Capacity | Reported ICE | Estimated areal capacity* |
|---|---|---|---|---|
| NCM811-S01 | Standard electrode; 12 mg/cm2 | 210.34 mAh/g | 88.58% | About 2.52 mAh/cm2 |
| NCM811-S03 | Dry electrode; 30 mg/cm2 | 216.99 mAh/g | 92.41% | About 6.51 mAh/cm2 |
*Estimated areal capacity uses reported gravimetric capacity multiplied by stated loading. It is not a substitute for a measured electrode areal-capacity record.
This is why the result is interesting but not self-proving. A higher loading can increase areal capacity while also increasing ionic and electronic transport distances. The reported figure suggests that S03 remained electrochemically accessible under the listed low-rate half-cell protocol, but it does not yet establish whether the same advantage survives higher rates, long cycling, or a full-cell anode balance.
Test Conditions and Source Figure
The supplied chart is a lithium-metal half-cell screen. That configuration is appropriate for comparing cathode access under two electrode constructions, but it gives the cathode an excess lithium source that a graphite or silicon-carbon full cell will not have. The data should therefore be used to select the next electrode experiment, not to claim finished cell energy.
| Parameter | Reported condition |
|---|---|
| Cathode | NCM811 lithium-ion cathode |
| Cell format | 2320 coin cell |
| Counter electrode | Lithium metal |
| Electrolyte | Carbonate-based electrolyte |
| Voltage range | 2.5-4.3 V |
| Charge / discharge rate | 0.1C / 0.1C |
| Test temperature | 25 +/- 1 C |
| Data source | NCM811 charge-discharge performance chart supplied for this article |
Why the Dry-Electrode Result Needs a Second Matrix
The next experiment should not compare only one standard electrode with one dry electrode. Repeat both conditions across multiple cells, then add at least one intermediate loading so the team can see whether the response changes gradually or only at the two tested points. Record electrode thickness, density, porosity if available, areal capacity, impedance, and cell-to-cell spread. Without those measurements, it is difficult to separate a process benefit from differences in coating mass or wetting.
Use battery test equipment and instruments that can keep the same current, cut-off, rest, and export protocol across the standard-to-dry matrix. The test method should then add rate capability and longer cycling before the dry electrode is paired with a practical anode.
Full-Cell Translation: The Missing Lithium Balance
The higher estimated areal capacity of the 30 mg/cm2 electrode makes anode matching more demanding, not less. A graphite or silicon-carbon anode must be selected from measured areal capacity and first-cycle loss, with an explicit N/P target and formation plan. The anode cannot be chosen from nominal gravimetric capacity alone because the NCM811 cathode loading, irreversible lithium consumption, and electrode density all affect the usable full-cell balance.
For the next design step, a graphite anode sheet can serve as a reference anode route, while a lithium-ion dry pouch-cell platform becomes relevant only after the high-loading cathode and anode are capacity-matched. The broader Battery Research hub connects these material, electrode, and cell-validation steps.
Data Scope
This article interprets the supplied NCM811 first-cycle voltage-capacity chart only. It supports the reported S01 and S03 capacities, loadings, voltage range, rate, temperature, lithium-metal half-cell format, carbonate-based electrolyte, and first-cycle efficiencies. It does not add cycle-life, rate-retention, impedance, density, thermal, safety, full-cell energy, or pouch-cell claims. The strongest publishable conclusion is that the 30 mg/cm2 dry electrode preserved near-210 mAh/g gravimetric capacity in this screening figure and deserves a controlled repeat matrix before broader claims are made.