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Porous Nb2O5 microspheres have been prepared by a facile solvothermal method and subsequent heat-treatment using cheap NbCl5 as a starting material. As anode materials for lithium-ion batteries (LIBs), porous Nb2O5 microspheres show good electrochemical performance with discharge capacities of 199 mA h g−1 after 50 cycles at a current density of 100 mA g−1 and 126 mA h g−1 after 150 cycles at a current...
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