Robust cyclic stability and high-power performance of Ni/Mg co-doped CeO2 electrodes for asymmetric hybrid supercapacitors
Bibliographic record
Abstract
Ceria co-doped with Ni and Mg (Ni, Mg@CeO 2 ) was examined for its electrochemical performance, showing impressive power density and cyclic stability in the fabricated device. The material was synthesized using an easy, low-cost solution combustion method. Two different materials were studied to evaluate the impact of co-doping: pristine CeO 2 /AC (M − 1) and Ni, Mg@CeO 2 composite with AC (Activated Carbon) (M − 2). Structural analysis confirmed the face-centered cubic (FCC) structure of CeO 2 through X-ray diffractometry (XRD). The structural and optical properties were characterized by using field-emission scanning electron microscopy (FESEM) and photoluminescence (PL) spectroscopy, respectively. The electrochemical behavior was tested with cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS), revealing the pseudocapacitive nature of the ceria-based electrodes. As an electrode material, CeO 2 /AC (M − 1) achieved a higher specific capacitance (C s ) of 244.4 F/g at 0.5 A/g, while Ni, Mg@CeO 2 /AC (M − 2) showed 197.6 F/g at the same current. In a full-device setup, Ni, Mg@CeO 2 //AC (M − 2) reached a C s of 63.3 F/g at 0.5 A/g, along with excellent cycling stability, retaining 100.4 % coulombic efficiency over 5000 GCD cycles. The hybrid device based on Ni, Mg@CeO 2 //AC displayed a maximum specific energy of 18.3 Wh/kg and a specific power of 467.5 W/kg at 0.5 A/g. • Facile & scalable solution combustion Synthesis of Ni,Mg co-doped CeO 2 . • Porous spherical morphology provides a high surface-to-volume ratio, enhancing active sites for charge storage. • Delivers Outstanding 124.5 F/g capacitance with excellent cycling stability, showing 100.4 % retention after 5000 cycles. • High energy & power density 36.36 Wh/kg & 935 W/kg, respectively as trademark competitive for supercapacitor applications. • Synergistic doping effect of Ni,Mg in CeO 2 optimizes electronic structure, boosting conductivity and redox activity.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
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 | 0.004 | 0.002 |
| 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 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".