Issue 36, 2019

Unlocking high capacities of graphite anodes for potassium-ion batteries

Abstract

Graphite is considered a promising candidate as the anode for potassium-ion batteries (KIBs). Here, we demonstrate a significant improvement in performance through the ball-milling of graphite. Electrochemical techniques show reversible K-intercalation into graphitic layers, with 65% capacity retention after 100 cycles from initial capacities and extended cycling beyond 200 cycles. Such an affinity of the graphite towards storage of K-ions is explained by means of SEM and Raman analyses. Graphite ball-milling results in a gentle mechanical exfoliation of the graphene layers and simultaneous defect formation, leading to enhanced electrochemical performance.

Graphical abstract: Unlocking high capacities of graphite anodes for potassium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
13 mar 2019
Accepted
28 jun 2019
First published
05 jul 2019
This article is Open Access
Creative Commons BY license

RSC Adv., 2019,9, 21070-21074

Unlocking high capacities of graphite anodes for potassium-ion batteries

M. Carboni, A. J. Naylor, M. Valvo and R. Younesi, RSC Adv., 2019, 9, 21070 DOI: 10.1039/C9RA01931F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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