2D-dimensional nickel oxide (NiO) nanoplates were prepared using a low pressure chemical vapor deposition (LPCVD) producing metallic Ni directly on stainless steel current collectors followed by annealing under ambient oxygen atmosphere. The structural identities of the as-deposited nanomaterials were examined by X-ray diffraction, which revealed the formation of NiO (111 preferred orientation) after annealing. The morphology was examined by field emission scanning microscopy, which displayed the uniform arrangement of NiO nanoplates. The electrochemical properties of the as-deposited NiO nanoplates were investigated galvanostatic discharge-charge experiments in the range of 4.0 to 0.1 V versus Li/Li+ at a constant current of 100 mA for the first 10 cycles. A capacity of 1377 mAh g-1 was observed during the first discharge process. The rate was increased to 200 mA which displayed a capacity 1291 mAh g-1. After 70 cycles at 100 mA a capacity of 1542 mAh g-1 was calculated. A capacity of 1723 mAh g-1 was shown at a constant current reading of 500 mA after 110 cycles. The as-deposited NiO nanoplates stabilize around 1650 mAh g-1 after 140 cycles at 500 mA. The NiO nanoplates exhibited better reversibility and higher capacity than previously synthesized NiO anodes. It is interesting that the NiO nanoplates held the extra capacity even after 150 cycles. The origin of the extra capacity in the NiO nanoplates will be discussed.

Chemical vapor deposition of cubic NiO nanoplates on stainless steel substrates as anode for lithium-ion battery

249th National Meeting (2015)

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