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Title: Heteroatom-doped microporous carbon nanosheets derived from pentaerythritol-melamine for supercapacitors and CO₂ capture
Authors: Hu, Xiaochun
Luo, Yuqing
Wu, Xianyue
Niu, Jiabin
Tan, Mingwu
Sun, Zhiqiang
Liu, Wen
Keywords: Engineering::Chemical engineering
Issue Date: 2022
Source: Hu, X., Luo, Y., Wu, X., Niu, J., Tan, M., Sun, Z. & Liu, W. (2022). Heteroatom-doped microporous carbon nanosheets derived from pentaerythritol-melamine for supercapacitors and CO₂ capture. Materials Today Energy, 27, 101010-.
Journal: Materials Today Energy 
Abstract: Heteroatom-doped microporous carbon nanosheets (HMCNs) are used in a wide range of applications, including gas adsorption, energy storage, and catalysis. Here, we demonstrate a solvent-free, template-free, one-pot polycondensation approach for the synthesis of HMCNs using melamine (MEL) and pentaerythritol (PER) as precursors. By varying the ratio of MEL to PER and the pyrolysis temperature, the doping amount, surface area and porosity of the HMCNs can be controlled. When used for CO2 capture, the HMCN synthesized by the pyrolysis of a 3:2 mixture of MEL and PER at 900 °C (3/2-HMCNs-900) affords a CO2 uptake of 5.35 mmol g−1 at 273 K and 1 bar CO2 partial pressure. Density functional theory calculations suggest that the high CO2 uptake performance of the HMCNs is associated with the chemical modification of the surface, as a result of N- and O- co-doping. When assembled in a supercapacitor, 3/2-HMCNs-900 exhibits a high specific capacitance (475 F g−1 at 1.3 A) and a fast charge-discharge rate of 13.3 F s−1 g−1. This study presents a novel, resource-efficient and environmentally friendly method for preparing HMCNs for energy and environmental applications.
ISSN: 2468-6069
DOI: 10.1016/j.mtener.2022.101010
Schools: School of Chemical and Biomedical Engineering 
Organisations: Cambridge Centre for Advanced Research and Education in Singapore (CARES) 
Singapore University of Technology and Design 
Rights: © 2022 Elsevier Ltd. All rights reserved. This paper was published in Materials Today Energy and is made available with permission of Elsevier Ltd.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles

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