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Figure 1
Multi-shelled V2O5 hollow microspheres. (a) The synthesis routes of multi-shelled hollow microspheres: (i) the conventional cation-adsorption process and (ii) the reported anion-adsorption process. (b) Discharge capacity versus cycle number for the prepared V2O5 hollow microspheres and nanosheets at 1000 mA g−1. Reprinted with permission from Ref.