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Electrode Performance of Sulfur-Doped Vanadium Pentoxide Gel Prepared by Microwave Irradiation for Rechargeable Magnesium Batteries

[ Vol. 4 , Issue. 3 ]


Masashi Inamoto, Hideki Kurihara and Tatsuhiko Yajima   Pages 238 - 243 ( 6 )


Rechargeable magnesium batteries have attracted attention for use in the nextgeneration power storage applications. V2O5 xerogel, which has a high capacity, is expected to be an active cathode material for magnesium rechargeable batteries. However, it faces the problem of degradation due to desorption of structural water. A vanadium pentoxide xerogel containing sulfur (S-V2O5 gel) was prepared by a new composition process and evaluated by structural analysis, and its electrode performance was analyzed. Structural analysis by X-ray diffraction, differential thermal analysis, and scanning electron microscopy showed that the bulk S-V2O5 gel adopted a V2O5 xerogel-like structure with a layer structure in a stable planar direction with added sulfur, and that the surface was a reformed hard amorphous structure due to treatment with a low-temperature plasma generated using carbon felt (CF-MWP). Charge-discharge tests revealed a specific capacity of 450 mAh g-1, and cyclic voltammetry was almost perfectly stabilized after the second cycle.


Cathode Material, microwave, rechargeable magnesium battery, sulfur doped, vanadium pentoxide, xerogel.


Department of Applied Chemistry, Graduate School of Engineering, Saitama Institute of Technology, 1690 Fusaiji, Fukaya, Saitama 369-0293, Japan.

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