γ-MnO_2结构模型现状与EMD的性能

State of structural model for γ-MnO_2 and performance of EMD

介绍了γ-MnO2的结构模型的新近进展以及研究γ-MnO2结构的方法一阶跃电位电化学谱、汇聚光束电子衍射法和TEM法。指出EMD在碱性电液中比CMD有优越的性能。尽管同属γ-型,即使同为EMD,由于结构特性的不同,放电性能也不尽相同。讨论了在不同放电电压下相应的反应过程。

The state-of-arts of recent develop ment on the structural model forγ-MnO 2 were reviewed.The MnO 2 samples were characterized by using of stepped potential electrochemic al spectroscope(SPECS),con-vergent beam electron diffraction(CBED)and TEM,showed that EMD has superior electrochemical perfor-mance in alkaline electrolyte solut ion to the CMD,although they are all b elong toγ-MnO 2 .Even if the samples all are EMD,the discharge performance may also be different due t o structural characterization.In addition,the corresponding reacti on processes for the different volta ge signal were discussed.