Scientists at Korea’s Daegu Gyeongbuk Institute of Science and Technology (DGIST), and several other academic institutions,have built a novel supercapacitor. What makes this one special is that it is able to self-recharge from an external energy source. A self-charging supercapacitor sourcing energy from solar could potentially keep going for a long time without any human intervention.
Supercapacitors, Batteries, and Fuel Cells
Supercapacitors, batteries, and fuel cells are all energy storage devices. But there the difference ends, because each type is designed for a different purpose:
- Batteries store larger amounts of energy that they release over a short period of time.
- Supercapcitors store less energy, but they can deliver it instantly on demand.
- Flow batteries store their energy in their electrolytes, and release it over a longer period.
The researchers at DGIST, and several other academic institutions focused their attention on supercapacitors, and developed a self-charging supercapacitor that runs on solar power.
The DGIST Self–Charging Supercapacitor Design
The novel DGIST storage device excels across several dimensions, according to SciTechDaily. It has notably improved power and energy densities, while also being stable during charging and recharging cycles.
This revolutionary technology has great potential for renewable energy storage, but how did they achieve this?
The DGIST team, and their associates constructed new electrodes comprising nickel-based carbonate and hydroxide composite material.Then they tweaked them by adding transition metals such as cobalt, copper, iron, manganese and zinc.
This adaption considerably increased their supercapacitor’s energy density, power density, and overall stability while charging.
This exceptional electrical performance, enabled the final step in developing their self-charging supercapacitor. When they connected it to a solar power source, it achieved a storage efficiency of 63 %, and a high overall efficiency of 5.17 %, while they sat back and watched.
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