Temperature-Dependent Electrical Transport Properties of Individual NiCo2O4 Nanowire

• DOI: 10.1186/s11671-018-2844-3
• Publication Date: 2019-01-08T17:23:35Z
• Authors: Caihong Jia; Feng Yang; Lei Zhao; Gang Cheng; Guanghong Yang
• Keywords: Ohmic contact; Variable-range hopping

Understanding the electrical transport properties of individual nanostructures is great importance to construction high-performance nanodevices. NiCo2O4 nanowires have been investigated widely as electrodes in electrocatalysis, supercapacitors, and lithium batteries. However, exact mechanism an nanowire still ambiguous, which obstacle for improving performance improvement energy storage devices. In this work, were prepared successfully by thermal transformation from CoNi-hydroxide precursors. The its temperature-dependent conduction mechanisms studied detail. current-voltage characteristics showed that ohmic a low field (< 1024 V/cm), Schottky emission middle electric (1024 V/cm < E 3025 Poole-Frenkel at high (> V/cm). A semiconductive characteristic found conductivity nanowire; temperature (T 100 K) can be explained Mott's variable range hopping (VRH) model. When greater than K, determined VRH nearest neighbor (NNH) Model. These understandings will helpful design energy-storage devices based on nanowires.