Facile synthesis of MoO2@C nanoflowers as anode materials for sodium-ion batteries

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MoO2@C nanoflowers were synthesized through a grinding method,followed by an annealing process.With excellent dispersity and structural integrity,the obtained MoO2@C dilivers a reversible capacity of 172 mAh g-1 at 0.1 A g-1 and a capacity of 166 mA h g-1 after 1000 cycles at 1.0 A g-1.Lithium ion batteries(LIBs) have been widely applied in portable electronics during the past decades.1 However,due to the limited availability and uneven distribution of lithium resources,LIBs suffer from obvious cost issues for their future applications.2 As a promising alternative to LIBs,sodium ion batteries(SIBs) have received considerable attention because the sodium resource is more abundant than lithium and owns similar chemical properties to lithium.
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