Herein, we suggest a simple chemical precipitation method for the preparation of bare and different levels of Zn doped MnO2  nanoparticles as electrodes for supercapacitors.

Senthil Kumar A

Department of Automotive Engineering

School of Mechanical Engineering

Vellore Campus

Sathishkumar K

Department of Electrical Engineering

School of Electrical Engineering

Poonguzhali R

Shanmugam N

Gobi R

Shanmugam R

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

RSC Advances

Influence of Zn doping on the electrochemical capacitor behavior of MnO2 nanocrystals

Asymmetric supercapacitors based on aqueous and solid-state electrolytes are useful for a variety of applications. The birnessite δ-MnO 2 is one of the efficient materials from the MnO x family characterized by large interlayer distance (∼7.3 Å) and high theoretical specific capacitance (∼1370 F g −1 ). However the main concern which hinders its usage for practical applications is its low electronic conductivity (∼10 −6 S cm −1 ). There are different means to enhance the conductivity and in the present studies, two simultaneous methods viz; a method of synthesis of nano-flakes along with Zn-doping in δ-MnO 2 is implemented. A specific capacitance of ∼466 F g −1 at a current density of 0.5 A g −1 is obtained for an optimum Zn doping concentration of 1 mol% which is almost two times more than the corresponding pristine one. Both aqueous and solid-state asymmetric supercapacitor devices are fabricated using Zn doped δ-MnO 2 as electrode material which can be easily scalable to industrial level. A lab-scale demonstration prototype is constructed which essentially validated the charging of solid-state supercapacitor using battery and allowing the supercapacitor to discharge through a red-LED by means of a two-way switch. © 2018

Applied Surface Science

Zn doped δ-MnO 2 nano flakes: An efficient electrode material for aqueous and solid state asymmetric supercapacitors

Bulletin of Materials Science

Bipolar resistive switching behaviour in Mn 0.03 Zn 0.97 O/amorphous La 0.7 Zn 0.3 MnO 3 heterostructure films

Scientific Reports

Merging of Kirkendall Growth and Ostwald Ripening: CuO@MnO2 Core-shell Architectures for Asymmetric Supercapacitors

Materials Chemistry and Physics

Synthesis and characterization of nanostructured ternary zinc manganese oxide as novel supercapacitor material

Journal of Alloys and Compounds

Enhanced electrochemical properties of cobalt doped manganese dioxide nanowires

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Publisher	Data powered by TypesetRoyal Society of Chemistry (RSC)
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