AI Article Synopsis
- An eco-friendly method was developed to create 3D sponge-like anode materials for sodium-ion capacitors, using gluconic acid and sodium carbonate in the process.
- The resulting carbon material featured thin porous walls and a disordered microstructure, enhancing sodium ion transport and providing ample adsorption sites.
- When paired with a similarly made porous carbon cathode, the sodium-ion capacitor achieved impressive energy/power metrics and maintained 70% capacity after 10,000 cycles.
Article Abstract
An eco-friendly and sustainable salt-templating approach was proposed for the production of anode materials with a 3D sponge-like structure for sodium-ion capacitors using gluconic acid as carbon precursor and sodium carbonate as water-removable template. The optimized carbon material combined porous thin walls that provided short diffusional paths, a highly disordered microstructure with dilated interlayer spacing, and a large oxygen content, all of which facilitated Na ion transport and provided plenty of active sites for Na adsorption. This material provided a capacity of 314 mAh g at 0.1 A g and 130 mAh g at 10 A g . When combined with a 3D highly porous carbon cathode (S ≈2300 m g ) synthesized from the same precursor, the Na-ion capacitor showed high specific energy/power, that is 110 Wh kg at low power and still 71 Wh kg at approximately 26 kW kg , and a good capacity retention of 70 % over 10000 cycles.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9804518 | PMC |
| http://dx.doi.org/10.1002/cssc.202201046 | DOI Listing |
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