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Electrochemical studies on Na0.44MnO2 as cathode material for Na-ion battery synthesized through sol-gel auto combustion process

[+] Author and Article Information
Mathiyazhagan Senthilkumar

NSTL, VISAKHAPATNAM VISAKHAPATNAM, ANDHRA PRADESH 530027 India senthizhan@gmail.com

Kosuri Jagadish

Batteries & Explosives Division NSTL Visakhapatnam, Andhra Pradesh 530027 India jagadish.kosuri936@gmail.com

T.V.S.L. SATYAVANI

NSTL Visakhapatnam, ANDHRA PRADESH 530027 India tvslsatyavani@gmail.com

Adapaka Srinivas Kumar

Vigyan Nagar Visakhapatnam, 530027 India adapakaeskay@yahoo.com

1Corresponding author.

Manuscript received March 29, 2019; final manuscript received June 18, 2019; published online xx xx, xxxx. Assoc. Editor: Leela Mohana Reddy Arava.

ASME doi:10.1115/1.4044155 History: Received March 29, 2019; Accepted June 23, 2019

Abstract

For the development of sodium ion secondary batteries, performance improvement in positive electrode is main area of reach in recent times. In which enhancement in electrochemical performance of Na0.44MnO2(NMO) material as positive electrode material for sodium ion secondary batteries plays a vital role. In this work, through sol-gel auto combustion process, NMO orthorhombic compound was prepared and characterized. It is electrochemical properties are investigated and discussed The material displays a discharge capacity of about 102.5 mAh/g at low current rate (C/20), which decreases to 36.75 mAh/g at high rate (2C). The capacity retention at C/10 after 50 cycles is 85.7%. The evaluation of Na-ion diffusion coefficients (DNa+) in NMO is accomplished by Potentiostatic intermittent titration technique (PITT) test, Galvanostatic intermittent titration technique (GITT) test. The obtained values for the Na-ion diffusivity were ranging between 10−14–10−15cm2s−1.

Copyright © 2019 by ASME
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