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Issue 56, 2018, Issue in Progress
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From grass to battery anode: agricultural biomass hemp-derived carbon for lithium storage

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Abstract

Biomass-derived carbon, as a low-cost material source, is an attractive choice to prepare carbon materials, thus providing an alternative to by-product and waste management. Herein, we report the preparation of carbon from hemp stem as a biomass precursor through a simple, low-cost, and environment-friendly method with using steam as the activating agent. The hemp-derived carbon with a hierarchically porous structure and a partial graphitization in amorphous domains was developed, and for the first time, it was applied as an anode material for lithium-ion battery. Natural hemp itself delivers a reversible capacity of 190 mA h g−1 at a rate of 300 mA g−1 after 100 cycles. Ball-milling of hemp-derived carbon is further designed to control the physical properties, and consequently, the capacity of milled hemp increases to 300 mA h g−1 along with excellent rate capability of 210 mA h g−1 even at 1.5 A g−1. The milled hemp with increased graphitization and well-developed meso-porosity is advantageous for lithium diffusion, thus enhancing electrochemical performance via both diffusion-controlled intercalation/deintercalation and surface-limited adsorption/desorption. This study not only demonstrates the application of hemp-derived carbon in energy storage devices, but also guides a desirable structural design for lithium storage and transport.

Graphical abstract: From grass to battery anode: agricultural biomass hemp-derived carbon for lithium storage

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Supplementary files

Article information


Submitted
20 Aug 2018
Accepted
03 Sep 2018
First published
18 Sep 2018

This article is Open Access

RSC Adv., 2018,8, 32231-32240
Article type
Paper

From grass to battery anode: agricultural biomass hemp-derived carbon for lithium storage

J. H. Um, C. Ahn, J. Kim, M. Jeong, Y. Sung, Y. Cho, S. Kim and W. Yoon, RSC Adv., 2018, 8, 32231
DOI: 10.1039/C8RA06958A

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    [Original citation] - Published by The Royal Society of Chemistry.

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