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Preparation of Fiber-Type Cathode and Its Electrode Characteristics for Sodium Ion Battery.

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Title: Preparation of Fiber-Type Cathode and Its Electrode Characteristics for Sodium Ion Battery.
Authors: Yi-Hung Liu1 yihung-ryuu@aist.go.jp;, Tomoaki Takasaki2, Kazuya Nishimura2, Shiori Katsura1, Masahiro Yanagida1, Tetsuo Sakai1 sakai-tetsuo@aist.go.jp
Source: Journal of The Electrochemical Society. 2014, Vol. 161 Issue 9, pA1194-A1199. 6p.
Subjects: Sodium ions, Battery additives, Hydrothermal electric power systems, Electroplating, Electrochemistry
Abstract: Fiber-type cathodes composed of Na-Mn-O for use in a sodium ion battery were developed. The active material was synthesized onto carbon fibers by a two-step procedure that included electrodeposition and hydrothermal reactions. The active material shapes were changed depending on the experimental conditions. The scale-shaped material composed of the Na0.91MnO2 phase was formed by the electrodeposition in an Mn(NO3)2solution, while the circular-shaped one was obtained in the MnSO4 solution. The addition of H2O2 and increase in the hydrothermal temperature helped to decrease the unreacted precursor phase. The scale-shaped cathode mainly composed of the Na0.91MnO2 phase exhibited the highest 185 mAh/g discharge capacity among the fiber-type Na-Mn-O electrodes, indicating that this active material is beneficial for the intercalation and deintercalation of sodium ions. In addition, both the scale-shaped and string-shaped cathodes exhibited similar rate and cycling performances. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Fiber-type cathodes composed of Na-Mn-O for use in a sodium ion battery were developed. The active material was synthesized onto carbon fibers by a two-step procedure that included electrodeposition and hydrothermal reactions. The active material shapes were changed depending on the experimental conditions. The scale-shaped material composed of the Na0.91MnO2 phase was formed by the electrodeposition in an Mn(NO3)2solution, while the circular-shaped one was obtained in the MnSO4 solution. The addition of H2O2 and increase in the hydrothermal temperature helped to decrease the unreacted precursor phase. The scale-shaped cathode mainly composed of the Na0.91MnO2 phase exhibited the highest 185 mAh/g discharge capacity among the fiber-type Na-Mn-O electrodes, indicating that this active material is beneficial for the intercalation and deintercalation of sodium ions. In addition, both the scale-shaped and string-shaped cathodes exhibited similar rate and cycling performances. [ABSTRACT FROM AUTHOR]
ISSN:00134651
DOI:10.1149/2.0071409jes