Coordinating gallium hexacyanocobaltate: Prussian blue-based nanomaterial for Li-ion storage

Title
Coordinating gallium hexacyanocobaltate: Prussian blue-based nanomaterial for Li-ion storage
Authors
최지원장개강이태형Bailey BubachMehdi OstadhassanHo Won JangMohammadreza Shokouhimehr
Issue Date
2019-11
Publisher
RSC advances
Citation
VOL 9, NO 46-26668-8
Abstract
Prussian blue analogs (PBAs) are a type of metal– organic framework and have drawn significant attention recently. To date, most are constructed with divalent transition metal ions coordinated to the N end of a cyanide bridge. In this report, we studied a trivalent gallium ion-based Ga hexacyanocobaltate (GaHCCo), which depicted a face-centered cubic crystal structure. In addition, the synthesized GaHCCo was demonstrated as a cathode material of lithium-ion batteries (LIBs) and was found to exhibit longterm stability, having a capacity retention of 75% after 3000 cycles of repeated charge– discharge cycling and an extremely high coulombic efficiency of 98%, which was achieved because of a solid-state diffusion controlled Li-ion storage process. After ex situ XRD analysis on the different charge stages, the Li-ion storage in the GaHCCo was attributed to the Co species via the formation of a Li/Co compound. This work will pave the way toward the study of PBAs constructed with trivalent metal ions and provide more insights into the development of high-performance LIBs in the future.
URI
http://pubs.kist.re.kr/handle/201004/70008
ISSN
2046-2069
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KIST Publication > Article
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