Opening Context
NVP cathode materials are evaluated not only by peak specific capacity, but also by whether the voltage profile, first-cycle efficiency, and electrode loading remain credible under realistic coin-cell screening conditions. For early R&D, a clean half-cell curve helps researchers separate material behavior from later full-cell balancing effects.
Why This Dataset Matters
The slide presents NVP cathode in sodium metal 2320 coin cells tested at 0.1C/0.1C and 25 +/- 1 deg C. The combination of 8.0 mg/cm2 for the normal S07 trace loading, 2.0-3.8 V voltage range, and the stated electrolyte makes the dataset useful for NVP screening with data-quality control. The key value is not only the headline capacity, but the way the voltage curve supports the interpretation.
Figure-Based Analysis
The figure below is the source dataset used for this article.
Figure 1. NVP charge-discharge performance dataset.
The reported specific capacity is 106.75 mAh/g for S07.
The reported first-cycle efficiency or coulombic efficiency is 98.75% for S07.
The electrode loading is 8.0 mg/cm2 for the normal S07 trace.
The voltage profile is technically consistent with the stated NVP cathode system. For this dataset, The S07 trace gives a reasonable NVP response, while other traces on the slide show first-cycle efficiencies above 100% and should be treated as abnormal screening results rather than performance claims. The Na metal counter electrode and 1 M NaPF6 in DEGDME electrolyte frame the result as a focused material-screening dataset rather than a final full-cell performance claim.
This article interprets the technically consistent S07 trace and treats the abnormal traces as a reminder to verify formation data before using screening results in product claims.
System-Level Interpretation
From a cathode-engineering perspective, the dataset suggests that NVP can sustain a usable charge-discharge response under the stated loading and voltage limits. The curve shape also helps identify whether the material is behaving as expected: plateau-dominant systems should show clear voltage features, while layered oxides often show more sloped profiles as sodium or lithium content changes.
Application Outlook
Based on the shown data, the most realistic near-term use is sodium-ion cathode qualification, method validation, and replicate screening. Before making final cell-level claims, researchers would normally add repeat-cell statistics, rate capability, longer cycling, impedance growth, electrode density, and full-cell balancing data. Even so, the present curve provides a practical starting point for material selection and electrode-sheet development.
From Materials to Cells
Moving from a single half-cell curve to a working battery requires more than active material capacity. Slurry design, coating uniformity, calendaring density, electrolyte compatibility, separator choice, and pouch-cell format all affect how the same material behaves in a realistic device. That is why material screening, customized electrode sheets, and small-format cell testing should be treated as connected steps in one development workflow.
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