Preparation of flower-like CuO by a simple chemical precipitation method and their application as electrode materials for capacitor |
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Authors: | Hongxia Zhang |
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Affiliation: | Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Nantong Street 145, Harbin, Heilongjiang 150001, China |
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Abstract: | A novel CuO electrode material with flower-like nanostructures was fabricated at a low temperature (80 °C) by a simple chemical precipitation method. Scanning electron microscopy (SEM) results showed that CuO with spherical and flower-like structure can be formed under a weak alkali (C6H12N4), and CuO with sheets structure can be obtained under a strong alkali (NaOH). A possible growth mechanism of CuO nanocrystals was discussed. The flower-like CuO electrode exhibited a higher specific capacitance (133.6 Fg−1) and an excellent cycle performance at a high current density of 10 mA/cm2. Specific capacitance of flower-like CuO was 405.3% higher than globular CuO (26.44 Fg−1) at 2 mA/cm2. |
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Keywords: | A Nanostructure B Chemical synthesis B Crystal growth D Electrochemical properties |
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