TY - JOUR
T1 - Electron delocalization in cyanide-bridged coordination polymer electrodes for Li-ion batteries studied by soft x-ray absorption spectroscopy
AU - Asakura, Daisuke
AU - Okubo, Masashi
AU - Mizuno, Yoshifumi
AU - Kudo, Tetsuichi
AU - Zhou, Haoshen
AU - Amemiya, Kenta
AU - De Groot, Frank M.F.
AU - Chen, Jeng Lung
AU - Wang, Wei Cheng
AU - Glans, Per Anders
AU - Chang, Chinglin
AU - Guo, Jinghua
AU - Honma, Itaru
PY - 2011/7/14
Y1 - 2011/7/14
N2 - The electronic structure change during the reversible Li-ion storage reaction in a bimetallic MnFe-Prussian blue analogue (LixK 0.14Mn1.43[Fe(CN)6]•6H2O) was investigated by soft x-ray absorption spectroscopy. The Mn L2,3-edge spectra revealed the unchanged Mn2+ high-spin state regardless of Li-ion concentration (x). On the other hand, the Fe L2,3-edge spectra clearly revealed a reversible redox behavior as Fe3+Fe2+ states with Li-ion insertion/extraction. Experimental findings suggested strong metal-to-ligand charge transfer in conjunction with the ligand-to-metal one. The resulting charge delocalization between the Fe and CN is considered to contribute to the high reversibility of the Li-ion storage process.
AB - The electronic structure change during the reversible Li-ion storage reaction in a bimetallic MnFe-Prussian blue analogue (LixK 0.14Mn1.43[Fe(CN)6]•6H2O) was investigated by soft x-ray absorption spectroscopy. The Mn L2,3-edge spectra revealed the unchanged Mn2+ high-spin state regardless of Li-ion concentration (x). On the other hand, the Fe L2,3-edge spectra clearly revealed a reversible redox behavior as Fe3+Fe2+ states with Li-ion insertion/extraction. Experimental findings suggested strong metal-to-ligand charge transfer in conjunction with the ligand-to-metal one. The resulting charge delocalization between the Fe and CN is considered to contribute to the high reversibility of the Li-ion storage process.
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U2 - 10.1103/PhysRevB.84.045117
DO - 10.1103/PhysRevB.84.045117
M3 - Article
AN - SCOPUS:79961212780
SN - 1098-0121
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 4
M1 - 045117
ER -