Synthesis, Characterization and Electrochemical Studies on Li4Fe(CN)6 as Cathode Material for Lithium Batteries
Bikash Mandal
Electrochemistry Laboratory, Department of Chemistry, Visva-Bharati University, Santiniketan-731235. India
I. Basumallick
Electrochemistry Laboratory, Department of Chemistry, Visva-Bharati University, Santiniketan-731235. India
Susanta Ghosh *
Electrochemistry Laboratory, Integrated Science Education and Research Centre, Visva-Bharati University, Santiniketan-731235, India
*Author to whom correspondence should be addressed.
Abstract
An easy and cost effective method of synthesis of Li4Fe(CN)6 has been reported. The material, as obtained, has been characterized by UV-VIS, FTIR, powder XRD and SEM-EDX. Cyclic-voltametry and charge-discharge studies were carried out for electrochemical characterization of the synthesized material. A laboratory model lithium cell was fabricated using Li4Fe(CN)6 as cathode, lithium metal as anode and 1M LiClO4 dissolved in ethylene carbonate and dimethyl carbonate (1:1) mixture as electrolyte. The cell shows an open circuit voltage (OCV) of 3.03 volts vs. Li and a discharge capacity of 90 mAhg-1 (theoretical capacity, 112 mAhg-1) in the first few cycles at 0.15 C rates. The charge-discharge behaviour remains practically unaltered up to 20 cycles. Thus Li4Fe(CN)6 may be considered as a promising cathode material for Lithium battery.
Keywords: Li4Fe(CN)6 cathode, cost effective method, low temperature calcinations, charge-discharge, lithium battery