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Kim, Youngsik
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Research Interests
  • Ionic conducting ceramic electrolyte membranes, energy conversion and storage materials and devices

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Binder-free organic cathode based on nitroxide radical polymer-functionalized carbon nanotubes and gel polymer electrolyte for high-performance sodium organic polymer batteries

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Title
Binder-free organic cathode based on nitroxide radical polymer-functionalized carbon nanotubes and gel polymer electrolyte for high-performance sodium organic polymer batteries
Author
Kim, Hyun WooKim, Hye-JungByeon, HuimyoungKim, JehaYang, Jung WoonKim, YoungsikKim, Jae-Kwang
Issue Date
2020-09
Publisher
Royal Society of Chemistry
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.8, no.35, pp.17980 - 17986
Abstract
The organic polymer battery is a promising alternative to the lithium ion battery, however its various properties need to be improved. In this study, we demonstrate an advanced organic radical battery (ORB) using a cathode based on poly(2,2,6,6-tetramethylpiperidine-4-yl-1-oxyl vinyl ether) (PTVE) and a microporous gel polymer electrolyte based on electrospun polyimide membrane. To improve upon the low electrical conductivity of PTVE, it is functionalized on carbon nanotubes (CNTs) by a dissolution-diffusion process. The PTVE-functionalized CNTs have a π–π* interaction between the two components, and could be formed into a dense electrode with reasonable porosity. The gel polymer electrolyte with the desired microporosity is also highly compatible. As a result, Na-ion organic full cells using PTVE-CNT composite electrode, gel polymer electrolyte, and hard carbon anode show good rate capability and stable cycling. The battery achieves discharging capacities of 128.6 and 68.2 mAh g-1 at 0.5 C and 10 C with 100% Coulombic efficiency and no self-discharge. Hence, this combination of composite electrode and gel polymer electrolyte lead to a safe, lightweight, environmentally benign, and sodium battery with high power-rate capability for various applications.
URI
https://scholarworks.unist.ac.kr/handle/201301/32340
URL
https://pubs.rsc.org/en/Content/ArticleLanding/2020/TA/D0TA04526H#!divAbstract
DOI
10.1039/D0TA04526H
ISSN
2050-7488
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