【摘要】 采用溶胶凝胶法制备合成富锂锰基正极材料Li_1.2Ni_0.2Mn_0.6O₂,在前期配制金属离子溶液时,通过添加不同量的葡萄糖（葡萄糖添加量分别为试剂总质量的0,6%,12%,36%,48%）来分析其对Li_1.2Ni_0.2Mn_0.6O₂的结构、形貌、电化学性能以及倍率性能的影响.恒流充放电测试结果显示,少量葡萄糖（6%,12%）加入,可以明显提高材料首次放电比容量.0.05C首次放电比容量由未加入葡萄糖材料的174 mAh/g提升至添加12%葡萄糖材料的265.9 mAh/g.倍率性能测试结果显示,葡萄糖的加入可以明显提高材料倍率性能.其中葡萄糖添加量为48%的材料倍率性能最好,首次放电比容量达到141 mAh/g,经过0.05C,0.1C,0.2C,0.5C,1C循环测试后再进行0.1C循环测试30次,放电比容量为110 mAh/g,容量保持率为78%.更多还原

【Abstract】 The lithium-rich manganese cathode material Li_1.2Ni_0.2Mn_0.6O₂ was prepared by sol-gel method.In the early stage of metalion solution preparation,the structure,morphology and electrochemistry of Li_1.2Ni_0.2Mn_0.6O₂ were analyzed with addition of x=0,6%,12%,36%,48% glucose（x=glucose quality/metal reagent quality）.Addition can significantly increase the material’s initial discharge specific capacity.The initial discharge specific capacity of 0.05 C increased from 174 mAh/g without added glucose material to 265.9 mAh/g with added glucose x=12%.The rate performance test results show that the addition of glucose can significantly improve the material rate performance.The material with added glucose x=48% has the best rate performance.The initial discharge specific capacity reached 141 mAh/g.After the cycle test of 0.05 C,0.1 C,0.2 C,0.5 C,and 1 C,the recycling test was performed 30 times for 0.1 C,the specific discharge capacity was 110 mAh/g,and the capacity retention rate was 78%.更多还原