The effect of 2-butyne-1, 4-diol （BD） on the deposition behavior of the Co-Ni alloy was investigated by linear sweep voltammetry. The results showed that BD could prevent the deposition of the Co-Ni alloy. The effec...The effect of 2-butyne-1, 4-diol （BD） on the deposition behavior of the Co-Ni alloy was investigated by linear sweep voltammetry. The results showed that BD could prevent the deposition of the Co-Ni alloy. The effect of BD concentration in the sulfate plating bath, on the structure of the Co-Ni deposit was studied by energy dispersive x-ray spectroscopy, scanning electron microscope, and X-ray diffraction, respectively. As a result, BD could smoothen the deposit surface and decrease the diameter of the grain, but too much of BD was not good for the size of the grain. In general, a hexagonal close-packed （hcp） phase of the Co-Ni alloy, with a preferentially oriented （110） plane, was prepared by electrodeposition in the presence of BD. The Co-Ni alloy as a catalyst for the electro-oxidation of ethanol in alkaline medium was investigated by cyclic voltammetry. The deposit plated from the bath containing BD possessed better electro-oxidation of ethanol performance compared with that of the deposit plated from only the sulfate plating bath, but too much of BD was not beneficial for catalytic activity. The Co-Ni film was suitable as a magnetic recording material.展开更多
采用固相燃烧法制备了具有多面体形貌的Ni-Co共掺杂尖晶石型LiNi0.01Co0.03Mn1.96O4(LNCMO)正极材料.研究结果表明,LNCMO具有优异的倍率性能和长循环稳定性,在25℃,1C或5C倍率条件下,初始放电比容量分别为110.6和102.3 m A·h/g,循...采用固相燃烧法制备了具有多面体形貌的Ni-Co共掺杂尖晶石型LiNi0.01Co0.03Mn1.96O4(LNCMO)正极材料.研究结果表明,LNCMO具有优异的倍率性能和长循环稳定性,在25℃,1C或5C倍率条件下,初始放电比容量分别为110.6和102.3 m A·h/g,循环1000次后容量保持率为75.7%和78.3%;在10C和20C高倍率下,循环1000次后,容量保持率分别为78.8%和54.2%;即使在高温(55℃)和1C倍率下,循环1000次后容量保持率仍为76.6%.LNCMO具有较大的Li+扩散系数(4.77×10^-11cm^2/s)和较低的表观活化能(23.37 k J/mol).展开更多
基金Projects (52074069,52174314) supported by the National Natural Science Foundation of ChinaProjects (E2020501022,E2021501029,E2022501030) supported by the Natural Science Foundation of Hebei Province+2 种基金Projects (N2223027,N2223009) supported by the Fundamental Research Funds for the Central Universities,ChinaProject (ZD2021331) supported by the Science and Technology Project of Hebei Education Department,ChinaProject (22567627H) supported by Performance Subsidy Fund for Key Laboratory of Dielectric and Electrolyte Functional Material of Hebei Province,China。
基金supported by the Natural Science Foundation of Fujian Province,China(Grant No.2006J0440).
文摘The effect of 2-butyne-1, 4-diol （BD） on the deposition behavior of the Co-Ni alloy was investigated by linear sweep voltammetry. The results showed that BD could prevent the deposition of the Co-Ni alloy. The effect of BD concentration in the sulfate plating bath, on the structure of the Co-Ni deposit was studied by energy dispersive x-ray spectroscopy, scanning electron microscope, and X-ray diffraction, respectively. As a result, BD could smoothen the deposit surface and decrease the diameter of the grain, but too much of BD was not good for the size of the grain. In general, a hexagonal close-packed （hcp） phase of the Co-Ni alloy, with a preferentially oriented （110） plane, was prepared by electrodeposition in the presence of BD. The Co-Ni alloy as a catalyst for the electro-oxidation of ethanol in alkaline medium was investigated by cyclic voltammetry. The deposit plated from the bath containing BD possessed better electro-oxidation of ethanol performance compared with that of the deposit plated from only the sulfate plating bath, but too much of BD was not beneficial for catalytic activity. The Co-Ni film was suitable as a magnetic recording material.
文摘采用固相燃烧法制备了具有多面体形貌的Ni-Co共掺杂尖晶石型LiNi0.01Co0.03Mn1.96O4(LNCMO)正极材料.研究结果表明,LNCMO具有优异的倍率性能和长循环稳定性,在25℃,1C或5C倍率条件下,初始放电比容量分别为110.6和102.3 m A·h/g,循环1000次后容量保持率为75.7%和78.3%;在10C和20C高倍率下,循环1000次后,容量保持率分别为78.8%和54.2%;即使在高温(55℃)和1C倍率下,循环1000次后容量保持率仍为76.6%.LNCMO具有较大的Li+扩散系数(4.77×10^-11cm^2/s)和较低的表观活化能(23.37 k J/mol).
