Issue 2, 2024

Ginger-derived hierarchical porous carbon as an anode material for potassium-ion batteries and capacitors

Abstract

Carbonaceous materials are ideal as an anode for potassium-ion batteries (KIBs) because of their low cost, tunable physiochemical properties, and excellent reversible intercalation of potassium-ions (K+). In this work, we propose for the first time an economically viable and environmentally friendly route for producing hierarchical nanoporous activated ginger-derived carbon (AGC). Large interlayer spacing with a disordered microstructure of AGC provides a reason to investigate it as a high-capacity anode for rechargeable KIBs. AGC exhibits excellent electrochemical characteristics under moderate (100 mA g−1) to high rate (1000 mA g−1) discharge conditions. Against a current density of 100 mA g−1, a steady-state reversible capacity of 220 mA h g−1 was delivered. Furthermore, a 175 mA h g−1 capacity has been demonstrated at a 1000 mA g−1 rate for an impressive 1000 cycles. Another striking feature of AGC is its high surface area of 2717 m2 g−1 which makes it a potential candidate as an electrode for constructing a potassium-ion capacitor (KIC). AGC was used as a negative electrode while activated candle soot (ACS) as the positive electrode to develop a dual carbon KIC with high-rate capability. The as developed dual carbon KIC delivered a reversible capacity of 120 mA h g−1 over 100 cycles at 50 mA g−1. In essence, due to the extraordinary physiochemical characteristics, AGC is therefore not only a superior electrode material to other biomass-derived carbons but also a viable contender for various other electroactive applications.

Graphical abstract: Ginger-derived hierarchical porous carbon as an anode material for potassium-ion batteries and capacitors

Supplementary files

Article information

Article type
Paper
Submitted
19 sep 2023
Accepted
29 nov 2023
First published
12 dec 2023
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2024,5, 632-641

Ginger-derived hierarchical porous carbon as an anode material for potassium-ion batteries and capacitors

C. S. Bongu and C. S. Sharma, Mater. Adv., 2024, 5, 632 DOI: 10.1039/D3MA00732D

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