CAJ | 학술논문

通过掺杂过渡金属元素铜，成功得到了粉末振实密度超过2．8g／cm^3的高密度的锂离子电池正极材料LiCoO2。其初始放电比容量超过140mAh／g，以1C倍率充放电300周后，容量保持率大于90％，显示出良好的循环性能。SEM照片显示材料颗粒致密、表面光滑，粒径主要分布在5～10／μm。安全测试结果表明其达到安全标准。此类LiCoO2材料的应用将有利于提高目前锂离子电池的体积能量密度。
통과참잡과도금속원소동，성공득도료분말진실밀도초과2．8g／cm^3적고밀도적리리자전지정겁재료LiCoO2。기초시방전비용량초과140mAh／g，이1C배솔충방전300주후，용량보지솔대우90％，현시출량호적순배성능。SEM조편현시재료과립치밀、표면광활，립경주요분포재5～10／μm。안전측시결과표명기체도안전표준。차류LiCoO2재료적응용장유리우제고목전리리자전지적체적능량밀도。
The Cu-doped LiCoO2 which the powder-stack-density exceed 2. 8 g/cm^3 have been studied. This cathode material exhibits an initial discharge capacity of 140 mAh/g, and more than 90% of the capacity is retained even after 300 cycles at 1C rate, reveals good cyclability. The SEM micrographs show that the grains of the material were compact and smooth, with the diameter distributing mainly at the range of 5μm to 10μm. The over-charged experiments present that the over-charged safety function satisfied the demands of practice. The application of the Cu-doped LiCoO2 will be propitious to improving the volume-energy-density of Lithium-on batteries.