Unraveling the Correlation between Structures of Carbon Nanospheres Derived from Polymeric Spheres and Their Electrochemical Performance to Achieve High-Rate Supercapacitors

Fei Xu, Yuqian Qiu, Guangshen Jiang, Baichuan Ding, Jingyuan Li, Qianhui Liu, Jianping Wu, Xiaosa Xu, Hongqiang Wang, Yeru Liang

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Understanding correlation between the nanostructure of porous carbons and their ion transport behavior is critical for achieving high-performance supercapacitors. Herein, the relationship between size and shell thickness of carbon nanospheres (CNSs) and capacitive electrochemical performance is clarified. Structural uniform CNSs with controlled diameters, prepared via template-free interfacial copolymerization, are emerging as an ideal platform for investigating the ion transport behavior. It is found that ionic transport is significantly enhanced while the introduction of hollow cores with thinner shell, by virtue of the hollow nanopore-accelerated mass transport to reduce ion diffusion length. The proof-of-concept supercapacitors, constituted of carbons with diameter and shell thickness of 91 and 28 nm, respectively, can maintain highest capacitance retention ratio of 86% at a high sweep rate of 300 mVs−1, also far outperforming the commercial activated carbon in terms of capacitance, rate capability, and surface efficiency, promising a brilliant application.

Original languageEnglish
Article number1800770
JournalMacromolecular Rapid Communications
Volume40
Issue number17
DOIs
StatePublished - 1 Sep 2019

Keywords

  • carbon nanospheres
  • hollow cores
  • interfacial copolymerization
  • ion transport
  • supercapacitors

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