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Meeting MS&T25: Materials Science & Technology
Symposium Energy Materials for Sustainable Development
Presentation Title Upcycling Polyethylene Waste Into Hybrid Graphitic Porous Carbon Materials Used in High-Performance Zinc-Ion Hybrid Capacitors
Author(s) Viet Hung Pham, Yuan Gao, Ngoc Tien Huynh, Yun-Yang Lee, Ki-Joong Kim, Congjun Wang, Christopher Matranga
On-Site Speaker (Planned) Viet Hung Pham
Abstract Scope Polyethylene (PE) waste is a challenge to upcycle into useful materials because this plastic tends to decompose into volatile compounds when heated at relatively low temperatures. In this work, we report a chemical process that addresses this challenge by converting mixtures of PE waste into a hybrid graphitic porous carbon (HGPC) that can be used as a zinc-ion hybrid capacitor (ZIHC) cathode. The PE waste derived HPGC (PW-HPGC) has a hybrid structure composed of graphene-like carbon nanosheets grown on the surface of carbon particles, high porosity with the BET surface area up to 1,763 m2g-1, and good graphitic degree with Raman I2D/IG ratios of 0.53. When used as a cathode material for ZIHCs, PW-HGPC exhibits an excellent capacity up to 126.7 mAhg-1 at mass loading of 10 mgcm-2. Moreover, PW-HGPC exhibits remarkable cycling stability with capacity retention of >94% after 10,000 cycles at a current density of 2.0 A g-1.

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