Radially aligned CNTs derived carbon hollow cylinder architecture for efficient energy storage. (10th September 2020)

• Record Type: Journal Article
• Authors: Tripathi, Prashant; Bhatnagar, Ashish; Ramesh, A.; Vishwakarma, Alok K.; Singh, Sweta; Bailmare, Deepa B.; Deshmukh, Abhay D.; Gupta, Bipin Kumar; Srivastava, O.N.
• Is Part Of: Electrochimica acta. Volume 354(2020)
• Publication Date: 2020-09-10
• Subjects: Carbon hollow cylinder -- Carbon nanotubes (CNTs) -- Energy storage -- Areal capacity; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2020.136650
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: To explore the practical feasibility of exotic carbon, various types of geometries of CNT configurations have been investigated such as CNT film, vertically aligned nanotubes, 3D pillared graphene-CNT network etc. High-performance and applicability of CNT derived electrodes in electrochemical energy storage depend on the structural design and high aspect ratio geometry. Here, we have strategically designed electrode derived from a special type of 3D geometry known as carbon hollow cylinders (CHCs) made up of CNTs arranged in the radial direction. The exceptional geometry provides a high areal capacity of 513.92 C/cm 2 at an applied current density of 16 mA/cm 2 . Also, high specific energy of 41.13 mWh/cm 2 at the specific power of 5694.92 mW/cm 2 originated from supercapacitors and battery response of the electrode material was attained, which idealized the fundamental of theory of composite type electrode material. Hence, proposed geometry sets a stepping stone for a paradigm shift in light-weight electrode which is not only binder-free but also designed with a special geometry that provides an exceptional higher areal capacity with stable network.