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https://doi.org/10.3938/NPSM.68.1315
A Study on the Synthesis and Electrochemical Characteristics of Carbonized Coffee Powder for Use as a Lithium-Ion Battery Anode
New Phys.: Sae Mulli 2018; 68: 1315~1323
Published online December 31, 2018;  https://doi.org/10.3938/NPSM.68.1315
© 2018 New Physics: Sae Mulli.

Tae Gyun KIM1, Jin Hyuk CHO1, De PHAM-CONG1, Injun JEON1, Jin Hyun HWANG2, Kyoung Hwa KIM3, Chae Ryong CHO*1, 2

1 Department of Nano Fusion Technology, Pusan National University, Busan 46241, Korea
2 Department of Nanoenergy Engineering, Pusan National University, Busan 46241, Korea
3 Department of Electronic Materials Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
Correspondence to: crcho@pusan.ac.kr
Received August 29, 2018; Revised October 23, 2018; Accepted November 1, 2018.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
We studied the carbonization due to the annealing condition of waste coffee powder for application as an active anode material for lithium-ion batteries (LIBs). The coffee powder used as an active anode material for LIBs was obtained from coffee beans, not from a coffee shells. The waste coffee powder was dried in air and heat-treated in an Ar/H$_2$ atmosphere to obtain a pore-forming activated carbon powder. The specific capacity of the sample annealed at 700 $^\circ$C was still 303 mAh/g after 1000 cycles at a current density of 1000 mA/g and with a coulombic efficiency of over 99.5%. The number of pores and the pore size of the waste coffee powder were increased due to chemical treatment with KOH, which had the some effect as an increased specific surface area. The waste coffee powder is considered to be a very promising active anode material because of both its excellent electrochemical properties due to enhanced carrier conduction and its being a cost effective resource for use in LIBs.
PACS numbers: 81.05.U-, 82.47.Aa, 88.20.F-
Keywords: Lithium ion battery, Waste coffee powder, Surface treatment, Electrochemical properties, Diffusion coefficient


April 2019, 69 (4)
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