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PSU Team Converts Coffee Grounds Into Supercapacitor


PITTSBURG, Kan. — The next time you make a pot of coffee, think twice before tossing the grounds in the garbage. You just might be throwing away the future of energy storage.

Jonghyun Choi, a Pittsburg State University student from South Korea, was the leader of a team at the Kansas Polymer Research Center that has figured out how to convert coffee waste into energy storage. The process starts with the waste — the grounds that you just throw in the trash when you’re done brewing the perfect pot — and ends with a small battery that has a 10-year life span, said Ram Gupta, Choi’s supervisor and an associate professor in the PSU chemistry department.

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