Electrodeposited Si˗O˗C as a High-Rate Performance Anode for Li˗ion Capacitor. Issue 12 (5th August 2019)

• Record Type: Journal Article
• Authors: Ahn, Seongki; Momma, Toshiyuki; Sugimoto, Wataru; Osaka, Tetsuya
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 12(2019)
• Page Start: A2683
• Page End: A2688
• Publication Date: 2019-08-05
• Subjects: Energy Storage -- Electrodeposition -- Li-ion capacitors -- Si-based anode; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1451912jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Li˗ion capacitors (LIC) which bridge the advantages of supercapacitors and Li˗ion batteries have attracted a great deal of attention as a promising energy storage device. In this study, we synthesize the Si˗O˗C by electrodeposition at low levels of electricity below 2.0 C cm −2 as an anode for LIC. The deposited Si amounts are controlled by charge density during electrodeposition from 0.3 to 1.0 C cm −2 . The material and electrochemical characteristics of Si˗O˗C fabricated at a charge density of 1.0 C cm −2 are studied. The LIC consisting of Si˗O˗C anode shows an encouraging 95% retention of the initial capacity after 1000 cycles. In addition, the LIC shows a capacity retention ratio of 94% at 140 C˗rate. This study reveals the potential prospect to use Si˗O˗C fabricated by electrodeposition as an anode for a high˗rate capability for LIC.