An in situ carbon-grafted alkaline iron electrode for iron-based accumulators

An in situ carbon-grafted alkaline iron electrode prepared from the active material obtained by decomposing the α-FeC 2 O 4 ·2H 2 O-polyvinyl alcohol (PVA) composite at 600 °C in a vacuum is reported. The active material comprises a mixture of α-Fe and Fe 3 O 4 with the former as the prominent compo...

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Published in:Energy & environmental science 2014, Vol.7 (3), p.111-1116
Main Authors: Rajan, Aravamuthan Sundar, Sampath, Srinivasan, Shukla, Ashok Kumar
Format: Article
Language:English
Subjects:
Accumulators
Current density
Decomposition
Discharge
Electrodes
Grafting
Iron
Polyvinyl alcohols
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description An in situ carbon-grafted alkaline iron electrode prepared from the active material obtained by decomposing the α-FeC 2 O 4 ·2H 2 O-polyvinyl alcohol (PVA) composite at 600 °C in a vacuum is reported. The active material comprises a mixture of α-Fe and Fe 3 O 4 with the former as the prominent component. A specific discharge capacity in excess of 400 mA h g −1 at a current density of 100 mA g −1 is obtained with a faradaic efficiency of 80% for the iron electrode made from carbon-grafted active material (CGAM). The enhanced performance of the alkaline iron electrode is attributed to the increased amount of metallic iron in the active material and its concomitant in situ carbon grafting. A carbon-grafted iron electrode prepared from the active material obtained by decomposing the α-FeC 2 O 4 ·2H 2 O--PVA composite exhibits improved performance and high-rate capability.
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The active material comprises a mixture of α-Fe and Fe 3 O 4 with the former as the prominent component. A specific discharge capacity in excess of 400 mA h g −1 at a current density of 100 mA g −1 is obtained with a faradaic efficiency of 80% for the iron electrode made from carbon-grafted active material (CGAM). The enhanced performance of the alkaline iron electrode is attributed to the increased amount of metallic iron in the active material and its concomitant in situ carbon grafting. 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subjects Accumulators
Current density
Decomposition
Discharge
Electrodes
Grafting
Iron
Polyvinyl alcohols
title An in situ carbon-grafted alkaline iron electrode for iron-based accumulators
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