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Hierarchical carbon coated vertically aligned α-MoO<sub>3</sub> nanoblades anode materials for supercapacitor application

Hierarchical carbon coated vertically aligned α-MoO3 nanoblades anode materials for supercapacitor application

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NOBY, Sohaila Z., Ankita MOHANTY, Peyman ZIRAK, Ananthakumar RAMADOSS, Lukas SCHMIDT-MENDE, 2022. Hierarchical carbon coated vertically aligned α-MoO3 nanoblades anode materials for supercapacitor application. In: Journal of Alloys and Compounds. Elsevier. 918, 165530. ISSN 0925-8388. eISSN 1873-4669. Available under: doi: 10.1016/j.jallcom.2022.165530

@article{Noby2022Hiera-57723, title={Hierarchical carbon coated vertically aligned α-MoO3 nanoblades anode materials for supercapacitor application}, year={2022}, doi={10.1016/j.jallcom.2022.165530}, volume={918}, issn={0925-8388}, journal={Journal of Alloys and Compounds}, author={Noby, Sohaila Z. and Mohanty, Ankita and Zirak, Peyman and Ramadoss, Ananthakumar and Schmidt-Mende, Lukas}, note={Article Number: 165530} }

eng Zirak, Peyman Noby, Sohaila Z. 2022 Mohanty, Ankita terms-of-use Zirak, Peyman 2022-06-01T13:33:35Z Ramadoss, Ananthakumar Molybdenum oxide (MoO<sub>3</sub>) is an appropriate electrode material for vast applications such as gas sensing, catalyst, and energy storage devices. Its high oxidation states provide the possibility for ion intercalation and de-intercalation to the electrode material, which is truly advantageous for supercapacitor application. Herein, we report about reduced vertically aligned α-MoO<sub>3</sub> nanoblades on conducting substrates via a post-treatment in reduced gas environments (H<sub>2</sub>, N<sub>2 </sub>and vacuum) to tune their conductivity by introducing oxygen vacancies. These α-MoO<sub>3</sub> nanoblades were further carbonized through decomposition of glucose as a carbohydrate material to obtain binder-free carbon coated vertically aligned α-MoO<sub>3 </sub>electrode. As a binder-free supercapacitor negative electrode, the vacuum treated α-MoO<sub>3</sub> electrode showed the highest specific capacitance (39.8 mF cm<sup>−2</sup>), as compared to that achieved by N<sub>2</sub> and H<sub>2</sub> treated samples (29.2 mF cm<sup>−2</sup> and 24.5 mF cm<sup>−2</sup>, respectively). Besides, the vacuum annealed electrode also maintained around 76.4% of its initial specific capacitance value after 10,000 cycles indicating a more stable electrochemical performance of such electrode. An asymmetric device 3D-MnO<sub>2</sub>//α-MoO<sub>3</sub> was assembled and it attained maximum specific capacitance value of 37.5 mF/cm<sup>2</sup> at current density value 1.5 mA cm<sup>− 2</sup> and maximum energy density value of 16.875 µWh cm<sup>-2</sup> at power density value of 675 µW cm<sup>-2</sup>. The results demonstrate that the proposed hybrid synthesis approach is very promising for preparation of binder-free materials for high-performance supercapacitors. 2022-06-01T13:33:35Z Schmidt-Mende, Lukas Mohanty, Ankita Schmidt-Mende, Lukas Hierarchical carbon coated vertically aligned α-MoO<sub>3</sub> nanoblades anode materials for supercapacitor application Noby, Sohaila Z. Ramadoss, Ananthakumar

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