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| Influence of CaCl2-NaCl Molten Salt on Preparation of Silicon Nanowire via Electrolysis of SiO2 |
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Received:June 18, 2019
Revised:June 28, 2019
Accepted:July 01, 2019
Published Online:October 23, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.11.015 |
| KeyWord:silicon nanowire, SiO2, molten salt electrolyte |
| Author | Institution |
| ZHOU Zhong-ren |
昆明理工大学 冶金与能源工程学院;锂离子电池及材料国家地方联合工程实验室 |
| ZHANG Ying-jie |
昆明理工大学 冶金与能源工程学院 |
| HUA Yi-xin |
昆明理工大学 冶金与能源工程学院 |
| DONG Peng |
昆明理工大学 冶金与能源工程学院 |
| RU Juan-jian |
昆明理工大学 冶金与能源工程学院 |
| DUAN Jian-guo |
昆明理工大学 冶金与能源工程学院 |
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| Abstract: |
| Nanosized silicon with several micrometers in length and 200 nm in width was synthesized by molten salt electrolysis method at 700 ℃ under cell voltage of 1.8 V for 5 h applying SiO2 powder as cathode raw material, equimolar CaCl2-NaCl mixed molten salt as electrolyte and graphite rod as anode. Effect of molten salt on cathode raw SiO2 was investigated. After rinsed in molten salt for 2 h at 700 ℃, raw material SiO2 is characterized by XRD and SEM. The results suggest that phase of raw material is unchanged but morphology has been converted from initial spheroidal particles to inter-linked network and porous structure. During electrolysis of SiO2, intermediate CaSiO3 is produced, which is further electrolyzed for final formation of metallic silicon. |
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