Fabrication and electrochemical characterization of a vertical array of MnO2 nanowires grown on silicon substrates as a cathode material for lithium rechargeable batteries |
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Authors: | Jae-Hun Kim Tarak AyalasomayajulaVenkata Gona Daniel Choi |
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Affiliation: | Nano & Micro Engineering Laboratory, Department of Materials Science and Engineering, University of Idaho, Moscow, ID 83844-3024, USA |
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Abstract: | A complementary metal-oxide-semiconductor (CMOS) compatible process for fabricating on-chip microbatteries based on nanostructures has been developed by growing manganese dioxide nanowires on silicon dioxide (SiO2)/silicon (Si) substrate as a cathode material for lithium rechargeable batteries. High aspect-ratio anodized aluminum oxide (AAO) template integrated on SiO2/Si substrates can be exploited for fabrication of a vertical array of nanowires having high surface area. The electrolytic manganese dioxide (EMD) nanowires are galvanostatically synthesized by direct current (dc) electrodeposition. The microstructure of these nanowire arrays is investigated by scanning electron microscopy and X-ray diffraction. Their electrochemical tests show that the discharge capacity of about 150 mAh g−1 is maintained during a few cycles at the high discharge/charge rate of 300 mA g−1. |
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Keywords: | Lithium battery Cathode material Nanowires Anodized aluminum oxide Electrolytic manganese dioxide |
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