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复合掺杂与包覆对尖晶石锰酸锂结构和性能的影响

China's Manganese Industry(2019)

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Abstract
采用固相烧结法与湿法包覆工艺,研究复合掺杂与包覆改性对尖晶石锰酸锂材料性能的影响.采用XRD、SEM、比表面积、振实密度以及电化学分析,发现在复合掺杂适量的Nb元素和Mg元素的基础上,以异丙醇铝为原材料,采用液相湿法对其颗粒表面包覆0.15%的Al2O3,样品可获得最优的电化学性能,0.5C放电比容量为115.73 mA·h/g,100周循环后比容量衰减至113.67 mA·h/g,容量保持率仍高达98.22%.
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