Microstructures and electrical properties of V2O5 and carbon-nanofiber composites fabricated by cold sintering process. (19th January 2018)

• Record Type: Journal Article
• Authors: Heidary, Damoon Sohrabi Baba; Guo, Jing; Seo, Joo-Hwan; Guo, Hanzheng; Rajagopalan, Ramakrishnan; Randall, Clive A.
• Is Part Of: Japanese journal of applied physics. Volume 57:Number 2(2018)
• Publication Date: 2018-01-19
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.57.025702
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: The ability to apply a low temperature sintering technique, so called cold sintering process, was employed to fabricate V2 O5 ceramic and carbon nanofiber (CNF) composites. The densities, microstructures, as well as electrical and electrochemical properties of (1 − x )V2 O5 – x CNF composites cold sintered at a temperature of 120 °C for a time of 20 min were investigated. All the samples can be sintered to >85% theoretical densities by cold sintering process. There is a limited grain growth in the cold sintered (1 − x )V2 O5 – x CNF composites. A small amount of V2 O5 amorphous phase can be observed and most of the CNFs are distributed along the grain boundaries of V2 O5 ceramic. With increasing the amount of CNFs, the electrical (electrical conductivity) and electrochemical (capacity) properties of (1 − x )V2 O5 – x CNF composites improve accordingly.