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Upcycling plastic bags into battery parts

Date:
February 13, 2019
Source:
American Chemical Society
Summary:
Plastic bag pollution has become a huge environmental problem, prompting some cities and countries to heavily tax or ban the sacks. But what if used plastic bags could be made into higher-value products? Now, researchers have reported a new method to convert plastic bags into carbon chips that could be used as anodes for lithium-ion batteries.
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Plastic bag pollution has become a huge environmental problem, prompting some cities and countries to heavily tax or ban the sacks. But what if used plastic bags could be made into higher-value products? Now, researchers have reported a new method to convert plastic bags into carbon chips that could be used as anodes for lithium-ion batteries. They report their results in ACS Omega. See it in action in a toy truck here.

Many plastic bags are used only once and then disposed, ending up in landfills, oceans and elsewhere in the environment, where they can take hundreds of years to decompose. Scientists have long recognized that the polyethylene in plastic bags could be an inexpensive source of energy-storing carbon. However, previous methods to upcycle polyethylene into pure carbon have been inefficient or required expensive, complex processes. Vilas Pol and colleagues wanted to develop a simpler yet efficient approach to convert plastic waste into useful carbon-containing materials.

The researchers immersed polyethylene plastic bags in sulfuric acid and sealed them inside a solvothermal reactor, which heated the sample to just below polyethylene's melting temperature. This treatment caused sulfonic acid groups to be added to the polyethylene carbon-carbon backbone so that the plastic could be heated to a much higher temperature without vaporizing into hazardous gases. Then, they removed the sulfonated polyethylene from the reactor and heated it in a furnace in an inert atmosphere to produce pure carbon. The team ground the carbon into a black powder and used it to make anodes for lithium-ion batteries. The resulting batteries performed comparably to commercial batteries.


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Journal Reference:

  1. Saúl Villagómez-Salas, Palanisamy Manikandan, Salvador Francisco Acuña Guzmán, Vilas G. Pol. Amorphous Carbon Chips Li-Ion Battery Anodes Produced through Polyethylene Waste Upcycling. ACS Omega, 2018; 3 (12): 17520 DOI: 10.1021/acsomega.8b02290

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American Chemical Society. "Upcycling plastic bags into battery parts." ScienceDaily. ScienceDaily, 13 February 2019. <www.sciencedaily.com/releases/2019/02/190213124422.htm>.
American Chemical Society. (2019, February 13). Upcycling plastic bags into battery parts. ScienceDaily. Retrieved May 22, 2024 from www.sciencedaily.com/releases/2019/02/190213124422.htm
American Chemical Society. "Upcycling plastic bags into battery parts." ScienceDaily. www.sciencedaily.com/releases/2019/02/190213124422.htm (accessed May 22, 2024).

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