Electrochemical deposition of V2O5 and Polyaniline Composite FIlms on a stainless steel with Controlled Composition
- Electrochemical deposition of V2O5 and Polyaniline Composite FIlms on a stainless steel with Controlled Composition
- 박경일; 조원일; 여인형; 모선일
- Issue Date
- 대한화학회 제103회 총회 및 학술발표회
- Conducting polymer and vanadium oxide composite materials are of great interest to improve the lithium
ion intercalation properties, the mechanical properties, and the conductivity of the electrodes for
rechargeable lithium batteries. In this work, vanadium oxide and polyaniline composite (V2O5/PANi)
films with controlled compositions were electrochemically prepared by controlling the solution
temperature. The V2O5 and PANi composite films on a stainless steel substrate were prepared by two
consecutive steps in a conventional three-electrode cell system. As a first step, the PANi film was grown
by a potentiodynamic polymerization method from a solution containing aniline monomer. Vanadium
oxide was then deposited on this polymer film as a second step by a potentiostatic anodization method
applying at +1.5 V from a VOSO4 solution. Temperature of the VOSO4 solution was controlled from
25oC to 60oC in order to control the V2O5 contents in the composite film. The composition of the
electrochemically prepared V2O5/PANi composite films was analyzed either by a FT-IR
spectrophotometer or by a thermal analytical method. High V2O5 contents in the V2O5/PANi composite
films were resulted by increasing the VOSO4 solution-temperature for the V2O5 deposition step.
Electrochemical performance of the V2O5/PANi composite film electrodes as cathode materials for Li
battery are tested by assembling the coin-type (CR2032) Li cells with a battery test system.
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