Journal
RSC ADVANCES
Volume 4, Issue 15, Pages 7374-7379Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra46645k
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Funding
- NFSC [21225103, 21221062, 51125001]
- THSJZ
- Tsinghua University Initiative Foundation Research Program [20101081771]
- Chinese Scholarship Council
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Here we have designed a strategy to improve the electronic conductivities of polyoxometalates (POMs) via property-oriented organic grafting for use in lithium-ion batteries (LIBs). POMs usually exhibit limited electronic conductivity that hinders their use in electronic applications. Organic grafting of POMs defines a valuable path for improving electronic conductivities of POMs, due to the enhanced metal to ligand charge transfer (MLCT) via d-pi electronic interactions, and results in their feasible application in LIBs. Comparative practical and theoretical study of the effect of functional groups revealed that grafting of the remote electron withdrawing group (-SCN) on POMs via organo-imidoylization along with lower values of lowest unoccupied molecular orbitals (LUMO) results in an enhanced performance as Mo-6-SCN shows initial discharge capacity of similar to 1678 mA h g(-1) with similar to 85% capacity retention and coulombic efficiency similar to 100% after 100 cycles.
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