期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 50, 期 41, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/aa8717
关键词
silicon nanowires; TiO2 nanoparticles; ionic liquid; supercapacitor electrode
Three TiO2 deposition processes are used to coat the surface of Si nanowire array electrodes for electrochemical double layer capacitors in room temperature ionic liquid [Bmim][NTF2]. The fabrication processes are based on wet chemistry only and temperature treatments are kept below 450 degrees C. Successful TiO2 coatings are found to be those that are carried out at low pressure and with low TiO2 coverage to avoid nanowires breakage. The best TiO2 coated Si nanowire array electrode in [Bmim][NTF2] showed energy densities of 0.9 Wh center dot kg(-1) and power densities of 2.2 kW center dot kg(-1) with a nanowire length of similar to 10 mu m.
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