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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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Highly porous piezoelectric PVDF membrane as effective lithium ion transfer channels for enhanced self-charging power cell

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Title
Highly porous piezoelectric PVDF membrane as effective lithium ion transfer channels for enhanced self-charging power cell
Author
Kim, Young-SooXie, YannanWen, XiaonanWanga, SihongKim, Sang JaeSong, Hyun-KonWanga, Zhong Lin
Issue Date
2015-05
Publisher
Elsevier BV
Citation
NANO ENERGY, v.14, pp.77 - 86
Abstract
A self-charging power cell (SCPC) is a structure that hybridizes the mechanisms for energy conversion and storage into one process through which mechanical energy can be directly converted into electrochemical energy. A key structure of an SCPC is the use of a polyvinylidene fluoride (PVDF) piezo-separator. Herein, we have fabricated a piezoelectric β-form PVDF separator with a highly porous architecture by introducing ZnO particles. The electrochemical charge/discharge performance of this SCPC was greatly enhanced at lower discharge rates compared to highly stretched (high-β-content) or less porous PVDF membranes. The lower charge-transfer resistance of this well-developed porous piezo-separator is the main factor that facilitated the transport of Li+ ions without sacrificing piezoelectric performance. This study reveals a novel approach for improving the performance of SCPCs.
URI
https://scholarworks.unist.ac.kr/handle/201301/17877
URL
http://www.sciencedirect.com/science/article/pii/S2211285515000075
DOI
10.1016/j.nanoen.2015.01.006
ISSN
2211-2855
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