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Activation-free, porous and superamphiphilic N-doped carbon capsular nanofibrous electrode for high performance electrochemical capacitor

journal contribution
posted on 2020-07-01, 00:00 authored by Z Li, X Fan, R Wang, Q Yang, M Guo, Y Wu, Jinfeng Wang, Jingyu Chen
Porous and heteroatom-doped carbon nanomaterials based electrodes, with fast charge-discharge rate, good rate capability, high circling stability, and excellent potential window retention under broaden current densities, are highly required for constructing instantaneous and high powered energy electrochemical capacitors. However, activation treatments are usually evitable for the fabrication of these nanomaterials, requiring the complex steps and causing extra cost. Herein, we demonstrate an alternative and activation-free route to address this challenge by directly carbonizing capsular polypyrrole nanofibrous membrane without activation. Given the high content of N (~5.75 at.%) and O (3.25 at%) functionalization, hierarchical porous structure, enough defect sites, and unique capsular structure, our carbon based electrode exhibits unique superamphiphilicity and good capacitive performances for electrochemical capacitor, such as good specific capacity (210 F g−1 under a current density of 0.25 A g−1), outstanding rate capability of 70.5% and good window potential retention (91%) from 0.25 to 50 A g−1. Moreover, our electrode also displays good circling stability of 95% after 10,000 cycles at 20 A g−1. Most importantly, superamphiphilic wettability provides our electrode with great potentials for high capacitive supercapacitors not limited in aqueous electrolytes but also in organic electrolytes.

History

Journal

Journal of power sources

Volume

463

Article number

228112

Pagination

1 - 8

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0378-7753

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

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