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Ramasubbu, Velayutham; Omar, Fatin Saiha; Ramesh, Kasi; Ramesh, Subramaniam; Shajan, Xavier Sahaya
Journal of energy storage, December 2020, 2020-12-00, Volume: 32Journal Article
•Novel TiO2 aerogel/Co-MOF composites were synthesized successfully.•The incorporation of Co-MOF was confirmed by XRD, EDS and elemental mapping.•The composites were used as supercapattery electrodes for the first time.•Remarkably, the composite-based electrodes possessed high specific capacity.•Excellent capacity retention (93%) after 5000 cycles was achieved for the supercapattery. Three-dimensional hierarchical nanostructured porous TiO2 aerogel/Co-MOF composites were synthesized via a one-step modified sol-gel method. The composite materials were used as an electrode material for supercapattery and their electrochemical performances were assessed. The obtained results showed that the addition of Co-MOF improved the specific capacity; achieved a maximum value of 111.2 C/g at 0.8 A/g which is higher than pure TiO2 aerogel (66.4 C/g) and is relatively high compared with other TiO2/carbon composites. The improved performance of the composite-based electrode is because of the synergistic effects of enriched electroactive site, high surface area, reduced pore size, low internal resistance and good mechanical stability offered by the incorporation of MOF. Further, a supercapattery (TiO2 aerogel/Co-MOF composite//activated carbon) was fabricated and delivered a high specific power of 1875 W/kg with an impressive capacity retention of 93% after 5000 charge-discharge cycles. Display omitted
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