Li+ Ion-exchanged Hollandite-type MnO2 in Molten Salt at Several Temperatures and Electrochemical Properties for Lithium Battery Electrodes
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概要
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The Li+ ion-exchanged α-MnO2 with the hollandite structure have been synthesized by Li+ ion-exchanging in a LiNO3/LiCl molten salt at 250–350°C. The amounts of the lithium incorporated increased with increasing ion-exchanging temperature. The Li-Mn-O spinel phase was generated in the hollandite structure on Li+ ion-exchanging over 300°C. The electrochemical measurements indicated that the electrochemical cycling performances were significantly improved by ion-exchanging at 300°C. At a higher temperature of 350°C, however, the generation of considerable amount of the spinel phase occurred in the structure, resulting in deterioration of the electrochemical properties.
著者
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Kadoma Yoshihiro
Department Of Applied Chemistry Tokyo Institute Of Technology
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Kumagai Naoaki
Department Of Applied Chemistry And Molecular Science Faculty Of Engineering Iwate University
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KIMURA Ryo
Department of Frontier Materials and Function Engineering, Graduate School of Engineering, Iwate University
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UI Koichi
Department of Frontier Materials and Function Engineering, Graduate School of Engineering, Iwate University
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