【摘 要】
：
The precursors with NiCO_3·2Ni(OH)_2·2H2_O,Co_2(OH)_2CO_3,or both NiCO_3·2Ni(OH)_2·2H_2O and Co_2(OH)-2CO_3 coated graphite microspheres were prepared respectively by the aqueous heterogeneous precipitation using nickel sulfate,cobalt nitrate,sodium carbo
【机 构】
：
School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
The precursors with NiCO_3·2Ni(OH)_2·2H2_O,Co_2(OH)_2CO_3,or both NiCO_3·2Ni(OH)_2·2H_2O and Co_2(OH)-2CO_3 coated graphite microspheres were prepared respectively by the aqueous heterogeneous precipitation using nickel sulfate,cobalt nitrate,sodium carbonate, ammonium bicarbonate and graphite microspheres as the main starting materials.Subsequently,Ni-, Co-and NiCo-coated graphite microspheres were successfully obtained by thermal reduction of the as-prepared precursors at 500℃for 2 h,respectively.These metal-coated graphite microspheres were characterized with a smooth,cohesive surface consisting of fine metallic particles.Optimized precipitation processing parameters of the concentration of graphite microspheres(10 g/L),the rate of adding reactants(3 mL/min)and pH value(8.0)were determined by a trial and error method.The thermal analysis of the precursors was investigated by TG.Powders of the precursors and the resultant metal-(Ni,Co and NiCo alloy)coated graphite microspheres were characterized by scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS)and X-ray diffraction(XRD).
其他文献
The essence of oxidation wear machanism of cenmented carbide tool was studied based on thermodynamics.Standard Gibbs free energy of possible reactions in cutting process at dif-ferent temperature was calculated using substance Gibbs free energy function m
In order to improve the performance of non-asbestos composite auto brake pads that are composed of matrix resin, reinforced material and fillers, a novel method with new technology of self-heal microcapsules was proposed. Nano reinforced fillers\' effec
The influences of concentration and modulus of sodium silicate solution and curing mode on the phase composition,microstructure and strength development in the geopolymers prepared using Class F fly ash were investigated.X-ray diffraction(XRD),Fourier tra
Mn-Zn ferrites(Mn_(1-x)Zn_xFe_2O_4)with different compositions were prepared by the coprecipitation method,and the influences of such synthesis conditions as pH value,composition and volume ratio(R)of the mixed solution and NH_4HCO_3 solution on their mic
A method of conventional chemical reaction to prepare delithiated cathode materials of Li-ion battery was introduced.The cathode material of Li-ion battery was mixed with oxidizing agent Na_2S_2O_8 in water solution,and the solution was stirred continuous