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Biomass waste, coffee grounds-derived carbon for lithium storage

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Title
Biomass waste, coffee grounds-derived carbon for lithium storage
Author(s)
Ji Hyun Um; Yunok Kim; Chi-Yeong Ahn; Jinsoo Kim; Yung-Eun Sung; Yong-Hun Cho; Seung-Soo Kim; Won-Sub Yoon
Publication Date
2018-09
Journal
Journal of Electrochemical Science and Technology, v.9, no.3, pp.163 - 168
Publisher
The Korean Electrochemical Society한국전기화학회
Abstract
Biomass waste-derived carbon is an attractive alternative with environmental benignity to obtain carbon material. In this study, we prepare carbon from coffee grounds as a biomass precursor using a simple, inexpensive, and environmentally friendly method through physical activation using only steam. The coffee-derived carbon, having a micropore-rich structure and a low extent of graphitization of disordered carbon, is developed and directly applied to lithium-ion battery anode material. Compared with the introduction of the Ketjenblack (KB) conducting agent (i.e., coffee-derived carbon with KB), the coffee-derived carbon itself achieves a reversible capacity of ~200 mAh/g (0.54 lithium per 6 carbons) at a current density of 100 mA/g after 100 cycles, along with excellent cycle stability. The origin of highly reversible lithium storage is attributed to the consistent diffusion-controlled intercalation/de-intercalation reaction in cycle life, which suggests that the bulk diffusion of lithium is favorable in the coffee-derived carbon itself, in the absence of a conducting agent. This study presents the preparation of carbon material through physical activation without the use of chemical activation agents and demonstrates an application of coffee-derived carbon in energy storage devices. (c) 2018, Korean Electrochemical Society. All rights reserved
URI
https://pr.ibs.re.kr/handle/8788114/5429
ISSN
2093-8551
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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