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Polyvinylpyrrolidone assisted sol-gel route LiCo1/3Mn1/3Ni1/3PO4 composite cathode for aqueous rechargeable battery

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Title Polyvinylpyrrolidone assisted sol-gel route LiCo1/3Mn1/3Ni1/3PO4 composite cathode for aqueous rechargeable battery
 
Creator KANDHASAMY, S
PANDEY, A
MINAKSHI, M
 
Subject Olivine
PVP
Sol-gel
Electrolyte
Aqueous battery
LITHIUM SECONDARY BATTERIES
CATION SUBSTITUTION
ION BATTERIES
PVP
NANOPARTICLES
LIMNPO4
 
Description Olivine-phosphate LiCo1/3Mn1/3Ni1/3PO4, synthesized via conventional solid state (SS) and polymer assisted sol-gel (SG) methods, is reported as a cathode material for aqueous rechargeable batteries. X-ray diffraction (XRD) analysis confirms phase pure compounds in an orthorhombic structure for both these methods. However, microstructural images show polyvinylpyrrolidone (PVP) assisted SG method aids colloidal growth giving evenly distributed microparticles while SS method tend to an agglomeration during high-temperature processing. The electrochemical properties for SG are seen to be dramatically superior to those of SS. The galvanostatic analysis of the SG shows improved specific capacity over the initial cycles (45 mAhig and 60 mAh/g for the 1st and 20th cycles) and stabilized upon cycling. This unique capability is due to the trapped organic products from the thermal decomposition of PVP that facilitates Li+ transfer. The trapped organic coating on the cathode surface without affecting the bulk olivine is evidenced by XRD. FTIR and XPS spectroscopic techniques. (C) 2011 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-10-16T07:03:12Z
2014-10-16T07:03:12Z
2012
 
Type Article
 
Identifier ELECTROCHIMICA ACTA, 60170-176
http://dx.doi.org/10.1016/j.electacta.2011.11.028
http://dspace.library.iitb.ac.in/jspui/handle/100/15503
 
Language en