Microstructure control of the graphite anode with a high density for Li ion batteries with high energy density

Title
Microstructure control of the graphite anode with a high density for Li ion batteries with high energy density
Author(s)
송태섭한형규[한형규]길기천[길기천]전예령[전예령]고영산[고영산]이창주[이창주]김민재[김민재]조채웅[조채웅]김기준[김기준]백운규[백운규]박현중[박현중]
Keywords
RECHARGEABLE LITHIUM BATTERIES; SILICON NANOWIRES; HIGH-CAPACITY; PERFORMANCE; ELECTRODES; CATHODES; ARRAY; POWER
Issue Date
201506
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v.166, pp.367 - 371
Abstract
As the density of graphite anode is increasing, the pore size and volume in the graphite anode is reduced, which results in a decrease in the electrolyte permeability of electrode. The electrochemical degradation of high density graphite anode due to the low permeability is a major obstacle to its use as anode for lithium ion batteries. In this study, we report on high density graphite anode with the carbon additive added that provides micron size pore structure of the high density graphite anode, which results in an increase in the rate capability. The high density graphite anode with carbon additive exhibited 32.4% higher rate capability at 1 C compared to the high density graphite anode without carbon additive. This improvement is mainly attributed to the increased micron-size pores, which enhances the kinetic associated with lithium by improved electrolyte permeation and increased interface between the electrolyte and active material. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/32017http://dx.doi.org/10.1016/j.electacta.2015.03.037
ISSN
0013-4686
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공과대학 > 신소재공학부 > Articles
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