Microwave Synthesis of MnO2/C and its Applications in Zinc-Air Battery

De Li Liu; Jin Ning Cheng; Jia Jun Han

doi:10.4028/www.scientific.net/AMR.724-725.808

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 724-725Microwave Synthesis of MnO2/C and its Applications...

Microwave Synthesis of MnO₂/C and its Applications in Zinc-Air Battery

Abstract:

MnO₂/C composites were synthesized in a microwave oven using the activated carbon as a carrier, manganese sulfate as manganese source, ammonium persulfate as an oxidant, ammonium sulfate as conductive agent. The effects of activated carbon and ammonium sulfate concentration on the MnO₂/C composite crystalstructure and assembly of the zinc-air battery were studied. The results show that the mixed crystal MnO₂/C has the best catalytic oxygen reduction effect. The reaction changes from chemical reaction to electrochemical reaction because of activated carbon. The power of MnO₂/C air battery is increased first and then decreased with the active carbon concentration increased. When the carbon concentration was 30gL^-1, the power reaches a maximum value. With the ammonium sulfate concentration increases the battery energy is first increased and then decreased. The power reaches a maximum value as the concentration of ammonium sulfate is 0.25molL^-1.

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Periodical:

Advanced Materials Research (Volumes 724-725)

Pages:

808-812

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.724-725.808

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Online since:

August 2013

Authors:

De Li Liu, Jin Ning Cheng, Jia Jun Han

Keywords:

Microwave Method, MnO₂/C Composite Materials, Zinc Air Battery

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