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Thin copper phosphide films as conversion anode for lithium-ion battery applications

DSpace at IIT Bombay

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Title Thin copper phosphide films as conversion anode for lithium-ion battery applications
 
Creator CHANDRASEKAR, MS
MITRA, S
 
Subject Copper phosphide
Conversion reaction
Electrochemical and solid state methods
Energy storage anode material
Lithium-ion Battery
NEGATIVE ELECTRODE MATERIAL
ELECTROCHEMICAL REACTIVITY
STORAGE DEVICES
CU3P
CHALLENGES
KINETICS
DESIGN
 
Description Air stable copper phosphide of thicknesses (0.2, 0.4 mu m) was synthesized over copper plates (of 10 mm diameter) by hybrid electrochemical deposition and low temperature solid-state reaction. Stoichiometric amount of red phosphorus (P) were sprayed over electrodeposited copper and followed by annealing at 250 degrees C under inert gas atmosphere for different durations (5 h, 7 h and 12 h). During this process, phosphorus particles diffuse by excavating into the copper deposits, producing holes, where the Cu3P crystallites nucleate and lead to conglomeration of several agglomerates and hence resulted in non-homogeneous morphology. A small extend of Cu3P oxidation occurs over the film's top surface. X-ray diffraction (XRD) patterns confirm that the layer to be pure Cu3P. Scanning electron microscopy (FEG-SEM) reveals a porous microstructure consisting of agglomerated particles with similar to 10 mu m size. The as-prepared carbon-free Cu3P electrodes exhibited significantly improved capacity retention and rate capability characteristics over 40 cycles when electrochemically tested against lithium at constant 20 mu A/cm(2) rendering it as possible negative electrode for high energy density lithium-ion battery (LiB) applications. (C) 2013 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-10-16T15:35:18Z
2014-10-16T15:35:18Z
2013
 
Type Article
 
Identifier ELECTROCHIMICA ACTA, 9247-54
http://dx.doi.org/10.1016/j.electacta.2012.12.136
http://dspace.library.iitb.ac.in/jspui/handle/100/15917
 
Language en