Charge-transfer complexes for high-power organic rechargeable batteries

Title
Charge-transfer complexes for high-power organic rechargeable batteries
Authors
홍지현강인영이세찬정성균구교진권기윤성원모김형섭윤갑인홍구탁장호원강기석
Keywords
에너지소재; 에너지저장; 유기물소재; 전기화학; 산화환원; 전자현미경
Issue Date
2019-07
Publisher
Energy Storage Materials
Citation
VOL 20-469
Abstract
Organic redox compounds are potential substitutes for transition-metal-oxide electrode materials in rechargeable batteries because of their low cost, minimal environmental footprint, and chemical diversity. However, their inherently low electrical conductivity and high solubility in organic solvents are serious impediments to achieving performance comparable to that of currently used inorganic-based electrode materials. Herein, we report organic charge-transfer complexes as a novel class of electrode materials with intrinsically high electrical conductivity and low solubility that can potentially overcome the chronic drawbacks associated with organic electrodes. The formation of the charge-transfer complexes, phenazine– 7,7,8,8-tetracyanoquinodimethane and dibenzo-1,4-dioxin– 7,7,8,8-tetracyanoquinodimethane, via a room-temperature process leads to enhancement in the electrical conductivity and reduction in the dissolution resulting in the high power and cycle performances that far outperform those of each single-moiety counterpart. This finding demonstrates the general applicability of the charge-transfer complex to simultaneously improve the electrical conductivity and mitigate the shortcomings of existing single-moiety-based organic electrode materials, and opens up an uncharted pathway toward the development of high-performance organic electrode materials via the exploration of various combinations of donor– acceptor monomers with different stoichiometry.
URI
http://pubs.kist.re.kr/handle/201004/70167
ISSN
2405-8297
Appears in Collections:
KIST Publication > Article
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