Transition metal oxides for high performance sodium ion battery anodes

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Jiang, Yinzhu ; Hu, Meijuan ; Zhang, Dan ; Yuan, Tianzhi ; Sun, Wenping ; Xu, Ben ; Yan, Mi (2014)

Sodium-ion batteries (SIBs) are attracting considerable attention with expectation of replacing lithium-ion batteries (LIBs) in large-scale energy storage systems (ESSs). To explore high performance anode materials for SIBs is highly desired subject to the current anode research mainly limited to carbonaceous materials. In this study, a series of transition metal oxides (TMOs) is successfully demonstrated as anodes for SIBs for the first time. The sodium uptake/extract is confirmed in the way of reversible conversion reaction. The pseudocapacitance-type behavior is also observed in the contribution of sodium capacity. For Fe2O3anode, a reversible capacity of 386 mAh g-1at 100 mA g-1 is achieved over 200 cycles; as high as 233 mAhg-1is sustained even cycling at a large current-density of 5 A g-1.
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    This work was supported by National Natural Science Foundation of China (NSFC-21373184) and Doctoral Fund of Ministry of Education of China. Dr. Yinzhu Jiang wishes to acknowledge an equipment subsidy offered by Alexander von Humboldt (AvH) Foundation.

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