Electrochemical Performance of Fe2O3-AB Based Composite Electrode
To find a suitable material for Fe-air battery anode, Fe2O3 nanoparticles (nm) and microparticles (µm) were used as active materials and Acetylene Black carbon (AB) as additive to prepare Fe2O3/AB composites. The effect of grain size of iron oxide particles and additives on the electrochemical be...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
H. : ĐHQGHN
2019
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| Subjects: | |
| Online Access: | http://repository.vnu.edu.vn/handle/VNU_123/67235 https//doi.org/ 10.25073/2588-1124/vnumap.4348 |
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| Institution: | Vietnam National University, Hanoi |
| Language: | English |
| Summary: | To find a suitable material for Fe-air battery anode, Fe2O3 nanoparticles (nm) and
microparticles (µm) were used as active materials and Acetylene Black carbon (AB) as additive to
prepare Fe2O3/AB composites. The effect of grain size of iron oxide particles and additives on the
electrochemical behavior of Fe2O3/AB composite electrodes in alkaline solution have been
investigated using cyclic voltammetry (CV), galvanostatic cycling and electrochemical impedance
spectroscopy (EIS) measurements. Iron oxide nanoparticles provided better cyclability than iron
oxide microparticles. Impedance of electrode increased during cycling but the nm-Fe2O3/AB
electrode gave smaller resistance than µm-Fe2O3/AB one. The additives showed strongly effects on
the electrochemical behaviors of iron oxide electrodes. The AB additive enhanced the electric
conductivity of Fe2O3/AB electrode and thus increased the redox reaction rate of iron oxide while
K2S interacted and broke down the passive layer leading to improved cyclability and giving higher
capacity for Fe2O3/AB electrodes. |
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