Journal
RSC ADVANCES
Volume 9, Issue 46, Pages 26668-26675Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ra03746b
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Funding
- Korea Institute of Science and Technology Future Resource Program [2E29400]
- Basic Science Research Program through the National Research Foundation of Korea [2017R1A2B3009135]
- China Scholarship Council [201808260042]
- Future Material Discovery Program [2016M3D1A1027666]
- National Research Foundation of Korea [2E29400] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 long-term 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.
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