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.com
Volume 6
Research & Reviews: Journal of Material Sciences
Advanced Materials 2018
September 19-21, 2018
September 19-21, 2018 Tokyo, Japan
22
nd
International Conference on
Advanced Materials and Nanotechnology
Hu-Geun Kwon et al., Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C4-023
Anion-exchange membrane with highly cross-linking and high ion-aggregation for non-aqueous
vanadium redox flow batteries
Hu-Geun Kwon and Seong-Ho Choi
Hannam University, Republic of Korea
T
he Non-aqueous Vanadium Redox Flow Battery (NVRFB) has the advantage of being able to operate at a higher cell
voltage, higher energy density, and wider temperature than the all-Vanadium Redox Flow Battery (VRFB). However, the
development of NVRFB is still in its early stages of research and remains a challenge to be solved before it can be successfully
applied to practical applications. One of the challenges is the ion exchange membrane, a key element in determining the
energy efficiency of battery. Ion exchange membranes in NVRFB systems are mainly anion-exchange membranes to prevent
permeability of metal cationic active species and serve to conduct BF
4
- or PF
6
- ions. However, due to the size of BF
4
- or
PF6- ions, ionic conductivity is low because of ion size, which limits battery efficiency. Therefore, the novel anion-exchange
membrane with large size ion channel must for NVRFB be developed in order to commercialize. In this study, anion-exchange
membranes were synthesized by inducing ionic aggregation by introducing crosslinking and ion exchanger simultaneously. It
is believed that the aggregation of the ion exchanger through crosslinking will have a high ionic conductivity by forming an
ion channel and the use of butyl reagent as a crosslinking agent will prevent crossover of energy storage material due to their
size. As evidence, NVRFBs single cell with this crosslinked membranes yielded high voltage efficiency and showed a tendency
to increase coulombic efficiency as the degree of crosslinking increased.
Biography
Hu-Geun Kwon has completed his Bachelor’s degree from Hannam University, Republic of Korea and currently pursuing his Master’s degree from Hannam
University. He has studied ion-exchange membrane for non-aqueous redox flow batteries. His current research interests are crosslinked polymer electrolyte
membrane for non-aqueous/aqueous redox flow batteries and anion exchange membrane fuel cell including ion transport phenomena.
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