Composites Part A: Applied Science and Manufacturing
Composites Part A: Applied Science and Manufacturing
5 years ago

Bio-inspired sandwich-structured carbon/silicon/titanium-oxide nanofibers composite as an anode material for lithium-ion batteries

Bio-inspired sandwich-structured carbon/silicon/titanium-oxide nanofibers composite as an anode material for lithium-ion batteries
A bio-inspired sandwich-structured carbon/silicon/titanium-oxide nanofibers composite is fabricated based on the self-assembly technique by using cellulose substance as both the carbon source and the structural scaffold. It holds the hierarchical structure of the initial cellulose substance. And it is composed of thin silicon layer sandwiched between the carbon nanofiber and the outer titanium oxide coating layer consisting of anatase titania nanoparticles with oxygen defects. Owing to the synergetic effect of the porous carbon nanofiber and titanium oxide coating layer, as well as its unique three-dimensional network structure, this nanocomposite shows enhanced lithium storage properties. For the composite with 24.1wt% of titanium oxide, it delivers a stable reversible capacity of ca. 792.6mAhg−1 at a current density of 100mAg−1 after 160 discharge/charge cycles, which superiors to the nanofibrous silicon and carbon/silicon matters as well as the carbon/silicon/titanium-oxide composites with low titanium oxide content therein.

Publisher URL: www.sciencedirect.com/science

DOI: S1359835X17302531

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