Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 148, Issue 3, Pages A275-A278Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.1350666
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An all solid-state thin film supercapacitor (TFSC) was fabricated with an amorphous ruthenium oxide (RuO2) thin film electrode and an amorphous LixPOyNz (Lipon) thin film electrolyte. The electrochemical behavior of the RuO2/Lipon/RuO2/Pt TFSC was characterized by a charge-discharge technique in the potential range of 0-2 V. The RuO2/Lipon/RuO2/Pt TFSC exhibited a behavior of a bulk-type supercapacitor, even though the capacity of an as-fabricated TFSC was found to be much lower than the bulk one and showed a rapid decrease in capacity. This can be explained by excess oxygen ions and interfacial structure modification. The discharge yield dropped by 53% after 500 cycles. The capacitance per volume of the RuO2/Lipon/RuO2/Pt TFSC at the first cycle is 38 mF/cm(2) mum. (C) 2001 The Electrochemical Society. All rights reserved.
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