Advertisement
Published in:
14-05-2019
Hierarchical porous architecture on Ni foam created via an oxidization-reduction process and its application for supercapacitor
Published in: Journal of Materials Science: Materials in Electronics | Issue 12/2019
Log inActivate our intelligent search to find suitable subject content or patents.
Select sections of text to find matching patents with Artificial Intelligence. powered by
Select sections of text to find additional relevant content using AI-assisted search. powered by
Abstract
Three-dimensional (3D) porous metals, particularly those with a hierarchical porous architecture, are the desirable current collector for a wide variety of electrochemical devices. It is highly desirable to develop a facile process for fabrication of such metallic architectures. Here we propose a novel strategy, oxidization and reduction process, to in situ create micron-scale pores on the ligaments of the commercial Ni foam. Through this simple process, a hierarchical microporous Ni foam (HMNF) composed of large pore channels and micron-scale pores in skeleton is created. This process is simple and green, avoiding the use of sacrificial materials. Furthermore, nanocrystalline MnO2 is coated on a HMNF to construct a supercapacitor electrode. The results indicate that the created micron porous architectures of the HMNF-MnO2 electrode enhance not only the electrochemical performance but also the mechanical robustness, leading to a high capacitance and excellent cycling stability.