Zhang, Jianan Wang, Kaixi Guo, Shaojun Wang, Shoupei Liang, Zhiqiang Chen, Zhimin Fu, Jianwei Xu, Qun One-Step Carbonization Synthesis of Hollow Carbon Nanococoons with Multimodal Pores and Their Enhanced Electrochemical Performance for Supercapacitors Hollow carbon capsules with multimodal pores are highly promising for developing novel electrode materials for high-performance electrochemical devices due to their more active sites for ion and electron transfer. However, at present, most of the previous efforts are focused on the multistep process for the synthesis of hollow carbon nanostructures with individual pores. Herein, hollow carbon nanococoons (HCNCs) with non-spherical cavity and multimodal hierarchical pores have been facilely synthesized via a one-step carbonization of a Fe<sub>2</sub>O<sub>3</sub>/carbon precursor core/shell nanospindle at 850 °C. We interestingly found that during the carbonization, Fe<sub>2</sub>O<sub>3</sub> was automatically “escaped” from the inside nanospindle, leading to the formation of new HCNCs. Most importantly, the spindle-shaped cavity of the obtained HCNCs with high conductivity can offer a multimodal ion diffusion pathway, which can facilitate the reaction kinetics in a supercapacitor. As a result, the HCNCs-based supacapacitor exhibits the capacitance of 220.0 F g<sup>–1</sup> at a given scan rate of 5 mV s<sup>–1</sup>, 3.5 times higher than that of hollow carbon spheres, high stability with 98% of the initial capacity maintained even after 1000 cycles, and high rate capability. This work provides a new and facile avenue for enhancing performance of a HCNCs-based supercapacitor by using the non-spherical hollow structures with multimodal pores. multimodal ion diffusion pathway;HCNC;2O;multimodal pores;nanospindle;cavity;carbonization;supercapacitor;Enhanced Electrochemical Performance;Fe;SupercapacitorsHollow carbon capsules;Hollow Carbon Nanococoons;novel electrode materials 2014-02-12
    https://acs.figshare.com/articles/journal_contribution/One_Step_Carbonization_Synthesis_of_Hollow_Carbon_Nanococoons_with_Multimodal_Pores_and_Their_Enhanced_Electrochemical_Performance_for_Supercapacitors/2323261
10.1021/am405375s.s001