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Structural Changes During Lithiation of TiNb2O7
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DOI：10.1021/acs.jpcc.2c03450.png)
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TiNb2O7 with a Wadsley-Roth crystallographic shear structure was prepared by the solid-state synthesis using preliminary mechanical activation. Its structural and electro-chemical properties were studied. Order/disorder in the distribution of Ti/Nb over the available metal sites was estimated using XRD and solid-state 93Nb NMR spectroscopy. Electro-chemical properties were investigated by galvanostatic cycling. The analysis of Li+ migration pathways in the sample was carried out on the basis of the bond-valence site energy approach (BVSE). Structural changes during chemical lithiation/delithiation of the as -prepared TiNb2O7 were analyzed by XRD and Nb-93 and 6,7Li NMR spectroscopy in combination with quantum chemical calculations.
Keyword:
LITHIUM INSERTION
NMR-SPECTROSCOPY
NIOBIUM OXIDE
NB-93 NMR
ANODE
SCALE
V-51
PERFORMANCE
QUADRUPOLE
PHASES
期刊
IF:
3.2
论文数:
5.6W
被引数:
15.0W
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