Preparation Of M_xO_y (M = Ni, Fe, Cu) Fibers And Study On Their Lithium Storage Properties

The increasing demand for high performance lithium ion batteries(LIBs) has aroused great interest in developing high specific capacity, cycle performance and rate capability anode materials. Transition metal oxides(TMOs) have attracted much attention as promising anode materials for rechargeable LIBs owing to their high theoretical capacity. Biomass materials as sources of renewable resource can be used as a biological template preparation of all kinds of inorganic materials, also can be used as carbon source and the preparation of porous carbon materials with hierarchical structure. Renewable biomass extraction of sodium alginate is a natural polymer materials,where the metal cations can be confined in an “egg-box” via coordination with negatively charged α-L-guluronate blocks. This paper tries to sodium alginate as the carbon source material preparation of a variety of unique micro-nano structure of metal oxide/carbon fiber composite materials.This paper mainly use the seaweed micron fiber for the template, the preparation of a variety of transition metal oxides with different structure of micro-nano composite materials. A general strategy has been developed to fabricate high-performance fibrous TMO anodes such as elemental Ni doped NiO(NiO/Ni/C-F), yolk-shell structured carbon@Fe2O3(C@Fe2O3-F), and hollow CuO fibers(CuO-HF) with controllable nanostructures by using alginate microfibers as templates.