Abstract
AbstractA composite of Nb2O5 and MoO2 was synthesised using a hydrothermal reaction (225 °C) followed by a short heat‐treatment step (600 °C) to achieve a high‐capacity, high‐rate anode for lithium‐ion battery applications. The composite was shown via powder X‐ray diffraction and electron microscopy to be an intimate mix of individual oxide particles rather than an atomically mixed oxide material, and shown by X‐ray fluorescence spectroscopy (XRF) to contain a 45 : 55 ratio of Nb : Mo. This material is demonstrated to show notable rate capability in lithium (Li) half‐cell cycling and rate tests. When cycled at 100 °C the material achieved over 100 mAh g−1 even after 400 cycles and shows a stable reversible capacity of 514 mAh g−1 (at 1 C), realising its theoretical capacity. The composite shows electrochemical results comparable to Nb2O5:C composites yet achieves far higher capacities at low‐rate due to the MoO2 content.
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