| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 184750 | Electrochimica Acta | 2015 | 6 Pages |
•FeNb2O6 and CrNb2O6 cathode materials achieved.•Reversible lithium insertion proved in both FeNb2O6 and CrNb2O6.•Nb(V)/Nb(IV) redox couple dominant rather than Cr(III)/Cr(II).•Initial drop in capacity interpreted as a result of channel blocking.•Strategies for future material developments proposed.
Lithium insertion in FeNb2O6 and CrNb2O6 has been investigated using the galvanostatic charge–discharge method and showed that more than half of the intercalated Li+ during first cycle is retained in the structure and is not de-intercalated during subsequent cycles. The effects of sintering on FeNb2O6 were investigated with lower applied temperatures yielding higher Li+ intercalation capability. Post galvanostatic XRD shows that the initial phase has been retained during cell cycling. Cyclic voltammetry reveals that chromium also takes part in electro-chemical activity in CrNb2O6.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
