Future Of Energy Storage: Uneaten Fruit Biowaste

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A team of Australian engineers is looking in an unusual place for the future of energy storage: uneaten fruit meaning they are looking into biowaste as a possible answer.

Building on research into bagasse, watermelons, pomelo peels, and even paper pulp, the engineers found a way to build ultracapacitors — extremely energy-dense storage devices — out of the jackfruit and durian.

In order to make use of the fruit, engineers converted it into an aerogel, which is a type of ultralight, porous material. To do that, they first heat-treated and then freeze-dried the spongy, inedible cores of both the jackfruit and durian, and then cast metal oxides onto them, according to the research paper.

The resulting carbon-rich aerogel, which looks like a cavernous piece of burnt toast, was able to reliably and repeatedly charge and discharge electricity — hinting at a future in which our energy storage depends less on batteries built from toxic metals and more on, well, old fruit.

It’s unclear how this process could be scaled up, especially since the ultracapacitors are dependent on the size of the fruit itself.

Reference- ScienceDirect, Futurism, Journal of Energy Storage

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