High Capacitance and Cycle‐Life Performance of a Binder‐Free Supercapacitor Nanocomposite Electrode by Direct Growth of Manganese Oxide Nanostructures on Carbon Nanotubes
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Bibliographic record
Abstract
Abstract MnO x thin films with various oxidation states (MnO, Mn 2 O 3 , MnO 2 and mixed MnO/Mn 3 O 4 ) were directly grown onto carbon nanotubes by pulsed laser deposition under vacuum and at different oxygen partial pressures. The microstructural features of the as‐deposited thin films are characterized by scanning electron microscopy and X‐ray photoelectron spectroscopy. The electrochemical behavior of the CNT/MnO x nanocomposites in 1 M Na 2 SO 4 electrolyte is discussed with regards to specific capacitance, and cycle‐life, by means of cyclic voltammetry and electrochemical impedance measurements. First, at slow potential scan rate of 1 mV s −1 , MnO x prepared under vacuum and 10 mTorr of O 2 delivered specific capacitance as high as 738 and 653 F g −1 , respectively. Second, the rate capability of these two nanocomposites over a wide range of scan rates showed that at 500 mV s −1 , the former retained 93 % whereas the later displayed an increase of 1.2 % with regards to their respective initial specific capacitance values at 1 mV s −1 . They also maintained 90 % and 95 % of their specific capacitance after 10 000 continuous cycles with a 100 mV s −1 scan rate. The binder‐free nature of the CNT/MnO x nanocomposites and remarkable electrochemical properties suggest that these materials could find application as excellent electrodes for supercapacitors.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it