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Cristin-resultat-ID:
922690
Sist endret:
8. mai 2012, 15:28
NVI-rapporteringsår:
2012
Resultat
Vitenskapelig artikkel
2012
Electrorefining of Metallurgical Grade Silicon in Molten CaCl2 Based Salts
J. Cai
Xue-tao Luo
Geir Martin Haarberg
Ole Edvard Kongstein
og
Shulan Wang
Tidsskrift
Tidsskrift
Journal of the Electrochemical Society
ISSN 0013-4651
e-ISSN 1945-7111
NVI-nivå 2
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Om resultatet
Om resultatet
Vitenskapelig artikkel
Publiseringsår: 2012
Volum: 159
Hefte: 3
Sider: D155 - D158
Lenker
Lenker
original online (doi)
https://doi.org/10.1149/2.041203jes
Importkilder
Importkilder
Isi-ID: 000299292100049
Beskrivelse
Beskrivelse
Engelsk
Tittel
Electrorefining of Metallurgical Grade Silicon in Molten CaCl2 Based Salts
Sammendrag
Electrorefining of metallurgical grade silicon was studied in molten CaCl2-NaCl-CaO-SiO2 (80:10:5:5 mol%) at temperatures from 1123 to 1223 K. A liquid anode prepared by alloying the metallurgical grade silicon with copper (31 mol% Si and 69 mol% Cu) was used to prevent the anode passivation problems and improve the purity of the produced silicon. Electrochemical studies of silicon deposition were performed, and the diffusion coefficient of Si (IV) was calculated. Analysis results indicated that the contents of boron and phosphorus in the refined silicon obtained by potentiostatic electrolysis were reduced from 36 ppmw and 25 ppmw to 0.27 ppmw and 0.89 ppmw respectively. The corresponding current efficiency and energy consumption were estimated to be 72% and about 2 kWh (kg of Si)−1. These promising results show that the present electrorefining process is an alternative way to produce high purity silicon for solar cell applications.
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Bidragsytere
Bidragsytere
J. Cai
Forfatter
ved Xiamen University
Xue-tao Luo
Forfatter
ved Xiamen University
Geir Martin Haarberg
Forfatter
ved Institutt for materialteknologi ved Norges teknisk-naturvitenskapelige universitet
Ole Edvard Kongstein
Forfatter
ved Bærekraftig energiteknologi ved SINTEF AS
Shulan Wang
Forfatter
ved Northeastern University Shenyang
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