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Citation: ZHANG Chun-Xi, XIA Xi. Property of Partially Chemically Reduced γ-MnO₂[J]. Chinese Journal of Applied Chemistry, ;2002, 19(5): 428-432. shu

Property of Partially Chemically Reduced γ-MnO₂

ZHANG Chun-Xi ,
XIA Xi ^,

1.
Institute of Applied Chemistry, Xinjiang University, Urumqi 830046

Corresponding author: XIA Xi,
Received Date: 19 July 2001
Available Online: 4 December 2001
Fund Project: 国家自然科学基金(29963002)资助项目 (29963002)

Partially reduced V-MnO₂ were prepared from I.C.No1 EMD by stirring method and additional ultrasonic irradiation in aqueous or organic medium in the presence of hydrazine hydrate respectively. The reduced samples were characterized by oxidation degree analysis, XRD, IR and TEM. The results showed that in aqueous medium ultrasound can accelerate the reduction and change the crystal form of products. The main crystal form of product prepared under stirring condition was T-MnOOH and that with ultrasound promotion was V-MnOOH. The properties of electrode fabricated by these partially reduced MnO_x were improved. The discharge capacity of partially reduced products increased by 21.5% compared with that of IC1.
- MnO_x,
- chemical reduction,
- property,
- ultrasound,
- MnOOH
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Property of Partially Chemically Reduced γ-MnO₂