World's smelliest fruit could charge your mobile phone

energy
Credit: CC0 Public Domain

Imagine if we could use naturally-grown products, like plants and fruit, to store electricity that charges commonly used electronics like mobile phones, tablets, laptops or even electric cars?

Researchers from the University of Sydney have done just that, and have developed a method that uses durian and jackfruit to create stores for rapid electricity charging.

School of Chemical and Biomolecular Engineering academic Associate Professor Vincent Gomes explains how he and the research team managed to turn the tropical fruits into super-capacitors.

How does it work?

"Using durian and jackfruit purchased from a market, we converted the fruits' waste portions (biomass) into super-capacitors that can be used to store electricity efficiently," said Associate Professor Vincent Gomes.

"Using a non-toxic and non-hazardous green engineering method that used heating in water and freeze drying of the fruit's biomass, the durian and jackfruit were transformed into stable carbon aerogels—an extremely light and porous synthetic material used for a range of applications.

"Carbon aerogels make great super-capacitors because they are highly porous. We then used the fruit-derived aerogels to make electrodes which we tested for their energy storage properties, which we found to be exceptional."

What are super-capacitors?

"Super-capacitors are like energy reservoirs that dole out energy smoothly. They can quickly store large amounts of energy within a small battery-sized and then supply energy to charge , such as mobile phones, tablets and laptops, within a few seconds," said Associate Professor Gomes.

World's smelliest fruit could charge your mobile phone
World's smelliest fruit could charge your mobile phone. Credit: University of Sydney

"Compared to batteries, super-capacitors are not only able to charge devices very quickly but also in orders of magnitude greater charging cycles than conventional devices.

"Current super-capacitors are made from activated carbon which are nowhere near as efficient as the ones prepared during this project."

Why durian and jack fruit?

"Durian waste was selected based on the excellent template nature provides for making porous aerogels," said Associate Professor Gomes.

"The and jack-fruit super-capacitors perform much better than the materials currently in use and are comparable, if not better, than the expensive and exotic graphene-based materials.

"Durian waste, as a zero-cost substance that the community wants to get rid of urgently due to its repulsive, nauseous smell, is a sustainable source that can transform the waste into a product to substantially reduce the cost of energy storage through our chemical-free, green synthesis protocol."

What could this technology be used for?

"We have reached a point where we must urgently discover and produce ways to create and store energy using sustainably-sourced materials that do not contribute to global warming," said Associate Professor Gomes.

"Confronted with this and the world's rapidly depleting supplies of fossil fuels, naturally-derived super-capacitors are leading the way for developing high efficiency energy storage devices," he said.


Explore further

Durian skin biocomposite for take-out containers and 3-D printing

More information: Kenny Lee et al, Aerogel from fruit biowaste produces ultracapacitors with high energy density and stability, Journal of Energy Storage (2019). DOI: 10.1016/j.est.2019.101152
Citation: World's smelliest fruit could charge your mobile phone (2020, March 5) retrieved 9 April 2020 from https://techxplore.com/news/2020-03-world-smelliest-fruit-mobile.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
174 shares

Feedback to editors

User comments