Synthesis of mesoporous niobium nitride nanobelt arrays and their capacitive properties

• DOI: 10.1016/j.apsusc.2016.04.173
• Publication Date: 2016-04-30T13:35:41Z
• Authors: Biao Gao; Xiang Xiao; Jianjun Su; Xuming Zhang; Xiang Peng; Jijiang Fu; Paul K. Chu
• Keywords: Niobium oxide; Niobium nitride

Abstract Mesoporous niobium nitride nanobelt arrays (Nb 4 N 5 NBAs) are fabricated directly on Nb foils by a hydrothermal reaction in KOH, protonation treatment in HNO 3 , and calcination in an NH 3 ambient. The morphology, composition and pore structure of the Nb 4 N 5 NBAs are characterized in details. In addition, the mesoporous Nb 4 N 5 NBAs electrode has good specific capacitance (37.4 mF cm −2 , or 124 F g −1 ) and delivers excellent rate performance due to the high porosity and good electron conductivity boding well for application to next-generation energy storage systems.