Polyethylene waste carbons with a mesoporous network towards highly efficient supercapacitors

Yimeng Lian; Mei Ni; Zhenghong Huang; Renjie Chen; Lei Zhou; Wellars Utetiwabo; Wen Yang

doi:10.1016/j.cej.2019.02.063

Polyethylene waste carbons with a mesoporous network towards highly efficient supercapacitors

Yimeng Lian, Mei Ni, Zhenghong Huang, Renjie Chen^*, Lei Zhou, Wellars Utetiwabo, Wen Yang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

102 Citations (Scopus)

Abstract

Herein, hierarchical porous carbon derived from polyethylene waste (plastic bags etc.) has been synthesized by ball-milling and carbonization with a flame-retardant agent, basic magnesium carbonate pentahydrate (MCHP:4MgCO₃·Mg(OH)₂·5H₂O). The presence of MCHP not only provides in-situ MgO template during pyrolysis, but also greatly enhances the thermal stability of polyethylene for carbonization. After subsequent NH₃ activation, the polyethylene waste derived carbon (PE-HPC-900NH₃) shows a high surface area and a unique property of meso-porosity, which contribute to the excellent capacitive performance. Remarkably, the obtained PE-HPC-900NH₃ electrode displays a relatively high specific capacitance with excellent cycling stability (about 97.1% of capacitance retention after 10,000 cycles at 2 A g⁻¹). A high energy density of 43 Wh kg⁻¹ can be achieved for the PE-HPC-900NH₃ symmetrical supercapacitor at an extremely wide voltage of 4 V in EMIMBF₄ due to the high purity and low ratio of O/N. This work provides a promising approach to disposal of waste plastics and opens new applications in various energy fields.

Original language	English
Pages (from-to)	313-320
Number of pages	8
Journal	Chemical Engineering Journal
Volume	366
DOIs	https://doi.org/10.1016/j.cej.2019.02.063
Publication status	Published - 15 Jun 2019

Keywords

Basic magnesium carbonate pentahydrate
Carbon
High efficient supercapacitor
Mesoporous network
Polyethylene waste

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10.1016/j.cej.2019.02.063

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title = "Polyethylene waste carbons with a mesoporous network towards highly efficient supercapacitors",

abstract = "Herein, hierarchical porous carbon derived from polyethylene waste (plastic bags etc.) has been synthesized by ball-milling and carbonization with a flame-retardant agent, basic magnesium carbonate pentahydrate (MCHP:4MgCO3·Mg(OH)2·5H2O). The presence of MCHP not only provides in-situ MgO template during pyrolysis, but also greatly enhances the thermal stability of polyethylene for carbonization. After subsequent NH3 activation, the polyethylene waste derived carbon (PE-HPC-900NH3) shows a high surface area and a unique property of meso-porosity, which contribute to the excellent capacitive performance. Remarkably, the obtained PE-HPC-900NH3 electrode displays a relatively high specific capacitance with excellent cycling stability (about 97.1% of capacitance retention after 10,000 cycles at 2 A g−1). A high energy density of 43 Wh kg−1 can be achieved for the PE-HPC-900NH3 symmetrical supercapacitor at an extremely wide voltage of 4 V in EMIMBF4 due to the high purity and low ratio of O/N. This work provides a promising approach to disposal of waste plastics and opens new applications in various energy fields.",

keywords = "Basic magnesium carbonate pentahydrate, Carbon, High efficient supercapacitor, Mesoporous network, Polyethylene waste",

author = "Yimeng Lian and Mei Ni and Zhenghong Huang and Renjie Chen and Lei Zhou and Wellars Utetiwabo and Wen Yang",

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year = "2019",

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doi = "10.1016/j.cej.2019.02.063",

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AU - Lian, Yimeng

AU - Ni, Mei

AU - Huang, Zhenghong

AU - Chen, Renjie

AU - Zhou, Lei

AU - Utetiwabo, Wellars

AU - Yang, Wen

PY - 2019/6/15

Y1 - 2019/6/15

N2 - Herein, hierarchical porous carbon derived from polyethylene waste (plastic bags etc.) has been synthesized by ball-milling and carbonization with a flame-retardant agent, basic magnesium carbonate pentahydrate (MCHP:4MgCO3·Mg(OH)2·5H2O). The presence of MCHP not only provides in-situ MgO template during pyrolysis, but also greatly enhances the thermal stability of polyethylene for carbonization. After subsequent NH3 activation, the polyethylene waste derived carbon (PE-HPC-900NH3) shows a high surface area and a unique property of meso-porosity, which contribute to the excellent capacitive performance. Remarkably, the obtained PE-HPC-900NH3 electrode displays a relatively high specific capacitance with excellent cycling stability (about 97.1% of capacitance retention after 10,000 cycles at 2 A g−1). A high energy density of 43 Wh kg−1 can be achieved for the PE-HPC-900NH3 symmetrical supercapacitor at an extremely wide voltage of 4 V in EMIMBF4 due to the high purity and low ratio of O/N. This work provides a promising approach to disposal of waste plastics and opens new applications in various energy fields.

AB - Herein, hierarchical porous carbon derived from polyethylene waste (plastic bags etc.) has been synthesized by ball-milling and carbonization with a flame-retardant agent, basic magnesium carbonate pentahydrate (MCHP:4MgCO3·Mg(OH)2·5H2O). The presence of MCHP not only provides in-situ MgO template during pyrolysis, but also greatly enhances the thermal stability of polyethylene for carbonization. After subsequent NH3 activation, the polyethylene waste derived carbon (PE-HPC-900NH3) shows a high surface area and a unique property of meso-porosity, which contribute to the excellent capacitive performance. Remarkably, the obtained PE-HPC-900NH3 electrode displays a relatively high specific capacitance with excellent cycling stability (about 97.1% of capacitance retention after 10,000 cycles at 2 A g−1). A high energy density of 43 Wh kg−1 can be achieved for the PE-HPC-900NH3 symmetrical supercapacitor at an extremely wide voltage of 4 V in EMIMBF4 due to the high purity and low ratio of O/N. This work provides a promising approach to disposal of waste plastics and opens new applications in various energy fields.

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Polyethylene waste carbons with a mesoporous network towards highly efficient supercapacitors

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Keywords

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