Combustion Product Characterization of the Iron-Heated Powders in Thermal Batteries

Authors

Jin CHONG, Tianjin Institute of Power Sources,Tianjin 300381,China;Institute of New Energy Material Chemistry,Nankai University,Tianjin 300071,China;
Xue-ping GAO, Institute of New Energy Material Chemistry,Nankai University,Tianjin 300071,China;
Ji-qiang WANG, Tianjin Institute of Power Sources,Tianjin 300381,China;

Corresponding Author

Jin CHONG(ChongJ@ATLBattery.com)

Abstract

The combustion products of thermal battery used iron-heated powders have been studied.It is identified by X-ray diffraction(XRD) analysis that the main compositions of the combustion products are Fe、FeO and KCl.The transmission electron microscopy(TEM) shows a typical core-shell structure with un-reacted Fe particle core coated by FeO shell with a shell thickness of around 200 nm.The combusted iron-heated powders exhibit no metal property,which is contrast to previous assumption.Further measurement indicates that at the ambient temperature the combustion products show semiconductor property of the p-type with conductivity in the order of 103 S·cm-1,which is five order lower than that of the iron at 800 K.Since the FeO layer formed during the iron-heated powders combustion is thin,its contribution to the internal resistance of the thermal batteries is negligible.

Keywords

thermal battery, iron heat powder, semiconductor, electrical conductivity

DOI Link

https://doi.org/10.61558/2993-074X.1924

Publication Date

2008-11-28

Online Available Date

2008-11-28

Revised Date

2008-11-28

Received Date

2008-11-28

Recommended Citation

Jin CHONG, Xue-ping GAO, Ji-qiang WANG. Combustion Product Characterization of the Iron-Heated Powders in Thermal Batteries[J]. Journal of Electrochemistry, 2008 , 14(4): 373-377.
DOI: 10.61558/2993-074X.1924
Available at: https://jelectrochem.xmu.edu.cn/journal/vol14/iss4/5