CAJ | 학술논문

采用镍锰氢氧化物和碳酸锂为原料,在高温下合成LiNi0.5Mn1.5O4正极材料。系统地研究了不同的退火工艺对LiNi0.5Mn1.5O4结构与电化学性能的影响。研究发现,合成的样品都具有标准的尖晶石结构和规则的八面体外形。电化学测试结果表明,在700℃下退火12h得到的样品电化学性能最佳。首次放电容量达到141mAh/g,40次循环后容量保持率为99.2%,5C放电时容量仍然达到122mAh/g。
채용얼맹경양화물화탄산리위원료,재고온하합성LiNi0.5Mn1.5O4정겁재료。계통지연구료불동적퇴화공예대LiNi0.5Mn1.5O4결구여전화학성능적영향。연구발현,합성적양품도구유표준적첨정석결구화규칙적팔면체외형。전화학측시결과표명,재700℃하퇴화12h득도적양품전화학성능최가。수차방전용량체도141mAh/g,40차순배후용량보지솔위99.2%,5C방전시용량잉연체도122mAh/g。
LiNi0.5Mn1.5O4 was synthesized by Ni0.25Mn0.75（OH）2 and Li2CO3 at high temperature.The effect of anneal system on the structure and electro-chemical performance was studied in detail.The results show that the synthesized samples have standard spinel structure and inerratic octahedron figure.Electrochemical tests show that the sample annealed at 700℃ for 12h have the best performance.The first discharge capacity is 141mAh/g,and the capacity retaining ratio is 99.2% after 40 cycles.The discharge capacity is 122mAh/g at 5C rate.