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Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

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Selectively accelerated lithium ion transport to silicon anodes via an organogel binder

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Title
Selectively accelerated lithium ion transport to silicon anodes via an organogel binder
Author
Hwang, ChihyunCho, Yoon-GyoKang, Na-RiKo, YounghoonLee, UngjuAhn, DongjoonKim, Ju-YoungKim, Young-JinSong, Hyun-Kon
Issue Date
2015-12
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.298, pp.8 - 13
Abstract
Silicon, a promising high-capacity anode material of lithium ion batteries, suffers from its volume expansion leading to pulverization and low conductivities, showing capacity decay during cycling and low capacities at fast charging and discharging. In addition to popular active-material-modifying strategies, building lithium-ion-rich environments around silicon surface is helpful in enhancing unsatisfactory performances of silicon anodes. In this work, we accelerated lithium ion transport to silicon surface by using an organogel binder to utilize the electroactivity of silicon in a more efficient way. The cyanoethyl polymer (PVA-CN), characterized by high lithium ion transference number as well as appropriate elastic modulus with strong adhesion, enhanced cycle stability of silicon anodes with high coulombic efficiency even at high temperature (60 degrees C) as well as at fast charging/discharging rates. (C) 2015 Elsevier B.V. All rights reserved
URI
https://scholarworks.unist.ac.kr/handle/201301/17561
URL
http://www.sciencedirect.com/science/article/pii/S0378775315301713
DOI
10.1016/j.jpowsour.2015.08.017
ISSN
0378-7753
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