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固相反应法合成掺铝的α型氢氧化镍及其电化学性能 总被引:11,自引:0,他引:11
Ni(OH)2 including 20% Al was synthesized by solid-state reaction. The result of XRD indicated that the sample thus prepared was α-Ni(OH)2, and its size and crystalline form were much poorer than those of the sample prepared by solution-state reaction. TG and DTA curves showed that α-Ni(OH)2 began to decompose at higher temperature than β-Ni(OH)2. The electrochemical behaviors of the sample were studied by cyclic voltammetry and constant current charge-discharge experiment. It was found that the sample by solid-state reaction had more ex-cellent electrode reversibility, higher discharge potential and higher discharge capacity. 相似文献
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Sc3+掺杂的尖晶石型LiMn2O4正极材料制备及性质 总被引:8,自引:0,他引:8
采用固相分段反应的方法,以LiOH·H2O、MnO2 和Sc2O3 为原料,合成了一系列Sc3+掺杂的尖晶石型锂离子电池正极材料Li1+xScyMn2-yO4 (y=0. 01、0. 02、0. 06、0. 10).利用X射线衍射测试研究了材料的结构,掺杂后的Li1+xScyMn2-yO4 保持了尖晶石相Fd3m结构.测试了材料的电化学性能,初次放电容量最高可达到135mAh/g, 40次循环后容量衰减率小于2%, X射线衍射测试显示尖晶石相得到了很好的保持. Sc3+掺杂显著提高了尖晶石型LiMn2O4 材料的性能. 相似文献
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