Nanoporous Versus Nanoparticulate Carbon-Based Materials for Capacitive Charge Storage

Chen, Yao; Hao, Xiaoyue; Chen, George Zheng

Abstract

This article reviews recent progresses in the preparation and supercapacitor applications of selected nanoporous and nanoparticulate carbon-based materials, namely activated carbons, graphenes and carbon nanotubes and their composites with redox materials. Simplified processing steps and graphitization are crucial for making activated carbons. Progressive liquid processing and furnace technology are mainly used in graphene preparation, including curlization, electrolyte incorporation, self-propagating high-temperature synthesis, molten salt technology, and flash Joule heating. Redox deposition and new dispersion methods open better routes to making carbon nanotube composites of high charge capacity. Charge storage mechanisms are compared with attention to the facts that activated carbons store ionic charges largely in desirable nanopores, while the ion-accessible external surfaces of nanoparticulates affect the storage performance of graphenes and composites of carbon nanotubes. Especially, it is explained that pseudocapacitance can result from partial (or zone) delocalization of electrons in graphenes caused by hetero atoms, oxygen in particular. A highlight of this review is on novel molten salt densified holey graphene that has enabled a high specific energy of 618Whkg−1 in supercapattery.

Citation

Chen, Y., Hao, X., & Chen, G. Z. (2020). Nanoporous Versus Nanoparticulate Carbon-Based Materials for Capacitive Charge Storage. Energy & Environmental Materials, 3(3), 247-264. https://doi.org/10.1002/eem2.12101

• Journal Article Type: Article
• Acceptance Date: Jun 11, 2020
• Online Publication Date: Aug 3, 2020
• Publication Date: Sep 1, 2020
• Deposit Date: Jul 10, 2020
• Publicly Available Date: Aug 4, 2021
• Journal: Energy and Environmental Materials
• Print ISSN: 2575-0356
• Electronic ISSN: 2575-0356
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 3
• Issue: 3
• Pages: 247-264
• DOI: https://doi.org/10.1002/eem2.12101
• Keywords: Activated carbon; graphene; carbon nanotube; electrolyte; supercapacitor
• Public URL: https://nottingham-repository.worktribe.com/output/4759227
• Publisher URL: https://onlinelibrary.wiley.com/doi/full/10.1002/eem2.12101
• Additional Information: This is the peer reviewed version of the following article: Chen, Y., Hao, X. and Chen, G.Z. (2020), Nanoporous Versus Nanoparticulate Carbon‐Based Materials for Capacitive Charge Storage. Energy Environ. Mater.. doi:10.1002/eem2.12101, which has been published in final form at https://onlinelibrary.wiley.com/doi/full/10.1002/eem2.12101. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.