High Performance MnO2 Nanoflower Electrode and the Relationship Between Solvated ion Size and Specific Capacitance in Highly Conductive Electrolytes

Izan Izwan, Misnon and Radhiyah, Abd Aziz and Nurul Khairiyyah, Mohd Zain and Vidhyadharan , Baiju and Syam, G. Krishnan and Rajan, Jose (2014) High Performance MnO2 Nanoflower Electrode and the Relationship Between Solvated ion Size and Specific Capacitance in Highly Conductive Electrolytes. Materials Research Bulletin, 57. pp. 221-230. ISSN 0025-5408. (Published)

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Abstract

Flower shaped birnessite type manganese oxide (δ-MnO2) nanostructures are synthesized using a simple hydrothermal process with an aim to fabricate high performance supercapacitors for energy storage electrode. The studies reveal that layered δ-MnO2 had a basal plane spacing of ∼0.73 nm and are composed of thin nanosheets of thickness ∼23 nm. A detailed investigation is undertaken to draw a relationship between the solvated ion size of alkaline electrolytes (LiOH, NaOH and KOH) and pore size in the electrode material favoring high specific capacitance and faster electrode kinetics. The present work not only develops a high performance supercapacitive material but also identifies that by suitably tuning the sizes of solvated ion and the pores, supercapacitive behavior of a single material system can be tailored.

Item Type:	Article
Uncontrolled Keywords:	Oxide; Chemical synthesis; Electrochemical properties; Energy storage
Subjects:	Q Science > QD Chemistry
Faculty/Division:	Faculty of Industrial Sciences And Technology
Depositing User:	Mrs. Neng Sury Sulaiman
Date Deposited:	07 Jul 2014 03:35
Last Modified:	05 Feb 2018 07:42
URI:	http://umpir.ump.edu.my/id/eprint/6137
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