Regensburg 2022 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 18: Poster Session 2

MM 18.19: Poster

Tuesday, September 6, 2022, 17:30–20:00, P2

Co(OH)2@FeCo2O4 as high-performance electrode material for supercapacitors — •Zidong Wang^{1, 2}, Yude Wang², Huaping Zhao¹, and Yong Lei¹ — ¹Fachgebiet Angewandte Nanophysik, Institut für Physik & IMN MacroNano, Technische Universität Ilmenau, 98693 Ilmenau, Germany — ²School of Materials and Energy, Yunnan University, 6500504 Kunming, Peoples Republic of China

Spinel-type MCo2O4 (M = Zn, Ni, Fe, *) are regarded as a partial replacement of Co3O4 without crystal structure changes, and they provide advantages of lower cost and improved performance compared with Co3O4. Particularly, the variable valence of Fe in FeCo2O4 benefits the energy storage capability. However, previous works indicate that the attainable performance of FeCo2O4 is still limited. Herein, a 2D planar morphology design is proposed to optimize the performance of FeCo2O4 as active materials of supercapacitors. In this work, nanosized Co(OH)2 were composited on FeCo2O4 nanosheets skeleton by a simple one-step hydrothermal process. Due to the synergistic effect, the sample achieves outstanding performances with the specific capacitance of 1173.43 F g*1 at a current density of 1 A g*1 and 95.4% capacitance retention after 5000 cycles. It indicates that nanostructured Co(OH)2@FeCo2O4 would have hopeful prospects in energy storage applications.