排序方式: 共有8条查询结果,搜索用时 156 毫秒
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锂离子电池正极材料LiCoO2的制备新方法 总被引:2,自引:0,他引:2
利用电解金属钴制得Co(OH)2-2xRx(其中R为有机酸和无机酸根离子)中间产物,然后根据钴含量与LiOH·H2O)固相反应制得了LiCoO2.通过X光衍射,扫描电镜以及激光粒度测试表明,所得的锂离子正极材料LiCoO2结构纯正,粒度分布集中,比表面积较大:对其进行充放电实验表明,放电容量比较高,首次放电容量达到146mAh/g,循环10次后容量仍保持在142mAh/g.该法可大大降低制备LiCoO2的生产成本,具有十分广阔的应用前景. 相似文献
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微波法制备掺碳LiFePO4正极材料 总被引:7,自引:0,他引:7
Cathode material LiFePO4 of lithium-ion battery was synthesized by microwave heating. The “carbon-included” LiFePO4 with improved conductivity was synthesized by the addition of graphite. And the influence of microwave-heating time on structure, morphology and charge/discharge performance of the products was discussed. The results of XRD, SEM, XPS, CV and charge/discharge testing measurements showed that the LiFePO4 product after 9 min in microwave oven had more advantages than other products. 相似文献
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外掺Y2O3对镍氢电池正极高温性能的影响 总被引:8,自引:2,他引:8
研究了外掺Y2O3对镍氢电池镍正极高温性能的影响. 通常镍正极在高温下放电比容量会骤然降低, 为了提高其高温性能, 进行了球型Ni(OH)2外掺不同比例Y2O3的实验, 对压制的镍电极在不同温度下的充放电情况进行了细致的研究. 研究发现外掺Y2O3的球型Ni(OH)2电极比普通球型Ni(OH)2电极的放电比容量在高温下要高出很多, 在0.2 C充放电情况下外掺1%是最佳比例, 它比普通球型Ni(OH)2电极的放电比容量要高出35%以上, 在1 C充放电情况下外掺0.2%是最佳比例, 它比普通球型Ni(OH)2电极的放电比容量要高出15%以上. 同时对外掺Y2O3提高镍正极放电比容量的原因也进行了初步探讨. 相似文献
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Cathode material LiVPO4Cl for lithium-ion rechargeable batteries was synthesized by one-step hydro-thermal method. The result of XRD measurement shows that LiVPO4Cl material has a triclinic crystal structure, P1 space group; the results of SEM and TEM indicate that the sample is mostly single-crystalline, stick-like material; and the results of charge/discharge testing and cyclic voltammetry measurement demonstrate that the charging plateau of LiVPO4Cl material maintains at 4.02 V and the discharging plateau at 3.86 V. After sufficient activation, the discharge capacity at 0.1C rate of the fortieth cycle of LiVPO4Cl material with relatively higher content of carbon reaches 101 mAh·g-1. 相似文献
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储氢合金阴极电还原葡萄糖制备山犁醇 总被引:1,自引:0,他引:1
混合稀土储氢合金具有的吸氢性能,可以以氢化物的形式可逆吸放氢,并在适当的条件下以高活性原子氢的形式释放所储存的氢;经活化的混合稀土储氢合金表面偏析形成的富镍层具有良好的催化氢化能力。利用稀土系储氢合金RENi3.9Co0.59Mn0.28Al0.22为阴极,恒电流电解法还原葡萄糖制备山梨醇,采用正交设计法优选得出电解条件:阴极液为0.4mol/L葡萄糖溶液,40℃,pH=12,电流密度为0.5A/dm^2。在该条件下取得了675的电流效率和80%的还原产率;探讨了储氢合金阴极对葡萄糖电化学还原反应机理。 相似文献
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