Issue 8, 2020

Hierarchical porous carbon nanofibers for compatible anode and cathode of potassium-ion hybrid capacitor

Abstract

The development of electrode materials with the capability of balancing kinetics and capacity between a battery-type anode and capacitor-type cathode is still a grand challenge for potassium-ion hybrid capacitors (PIHCs). Herein, we report the design and synthesis of phosphorus/nitrogen co-doped hierarchical porous carbon nanofibers (PN-HPCNFs) that feature desirable one dimensional (1D) structure and favorable electrochemical properties for PIHC application. We demonstrated that the as-prepared PN-HPCNFs presented a highly attractive performance in terms of capacity or capacitance and durability as both the battery-type anode and capacitor-type cathode of PIHCs, which endows it with great potential for practical application in full PIHCs by delivering a high energy density of 191 W h kg−1 and a high power output of 7560 W kg−1 as well as an ultralong lifespan (82.3% capacity retention after 8000 cycles). Systematic characterization analysis and first-principle calculations demonstrated that the hierarchical pores in the 1D structure, heteroatom P/N co-doping, and enlarged interlayer graphite spacing in the APN-HPCNF contributed synergistically to the outstanding electrochemical performance of PIHCs.

Graphical abstract: Hierarchical porous carbon nanofibers for compatible anode and cathode of potassium-ion hybrid capacitor

Supplementary files

Article information

Article type
Paper
Submitted
13 Feb 2020
Accepted
25 Mär 2020
First published
25 Mär 2020

Energy Environ. Sci., 2020,13, 2431-2440

Hierarchical porous carbon nanofibers for compatible anode and cathode of potassium-ion hybrid capacitor

X. Hu, G. Zhong, J. Li, Y. Liu, J. Yuan, J. Chen, H. Zhan and Z. Wen, Energy Environ. Sci., 2020, 13, 2431 DOI: 10.1039/D0EE00477D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements