The search goes on for the first killer graphene app. Batteries might seem a pretty humble application for such a highly touted, supposedly miraculous substance but, as any smartphone user knows, batteries are the Achilles heel of hi-tech. A lot of our gear spends a lot of time on the charger.
Micro-supercapacitors might be the answer. Power density in some experimental graphene super-capacitor devices is several times that of standard thin-film lithium batteries but volume is a problem: graphene is only one atom thick. A Chinese team, working in China, Singapore and the USA, may have come up with the solution: creating a mesh of carbon nanotubes with interposed doped graphene sheets. They claim more than twice the power density of ordinary batteries and “a long cycle life”. Ah – how long, that is the question.
Nature Nanotechnology, July 2014
Micro-supercapacitors might be the answer. Power density in some experimental graphene super-capacitor devices is several times that of standard thin-film lithium batteries but volume is a problem: graphene is only one atom thick. A Chinese team, working in China, Singapore and the USA, may have come up with the solution: creating a mesh of carbon nanotubes with interposed doped graphene sheets. They claim more than twice the power density of ordinary batteries and “a long cycle life”. Ah – how long, that is the question.
Nature Nanotechnology, July 2014
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