National University of Singapore (NUS) researchers have developed an organic material that could advance ultra-stable, high capacity and environmental-friendly rechargeable batteries.
The material which was developed under the guidance of Professor Loh Kian Ping from NUS’ Department of Chemistry, boasts of superior electrical conductivity and energy retention capability for use in battery applications.
Researchers are of late turning to more sustainable, environmentally friendly methods of producing batteries. One such method is to use organic materials as an electrode in the rechargeable battery.
Organic electrodes leave lower environment footprints during production and disposal which offers a more eco-friendly alternative to inorganic metal oxide electrodes commonly used in rechargeable batteries. These electrodes however possess certain limitations – they have poor electrical conductivity and undermine the stability of organic compounds when used in batteries.
To overcome these limitations, Prof Loh and his research team synthesised a novel organic compound 3Q (π-conjugated quinoxaline-based heteroaromatic molecule) that has up to six charge storage sites per molecule in an effort to enhance its conductivity and energy retention.
When hybridised with graphene and used in an ether-based electrolyte, the team observed that the 3Q-based electrode displayed a high electrical conductivity of 395 milliampere hour per gram. It also exhibited a strong energy retention capability after multiple cycles of charge and discharge.
Prof Loh explains, “Our study provides evidence that 3Q, and organic molecules of similar structures, in combination with graphene, are promising candidates for the development of eco-friendly, high capacity rechargeable batteries with long life cycles.”
Image credits and content: Bloomberg, LiveMint/National University of Singapore (NUS)