CAJ | 학술논문

以LiOH·H2O、Ni(OAc)2·4H2O、Co(OAc)2·4H2O和MnO2为原料,在水热反应釜中预处理,然后进行高温固相反应,合成了一系列锂镍钴锰氧化物LiNi0.75-xCoxMn0.25O2(x=0.05,0.10,0.15,0.20,0.25).通过X射线衍射(XRD)、扫描电子显微镜(SEM)和电化学性能测试对所得样品的结构、形貌、粒径及电化学性能进行了表征.结果表明,当x=0.20时,所合成的正极材料具有很好的α-NaFeO2型层状晶体结构,晶胞参数α=0.2861 nm,c=1.4164 nm,V=0.1004 nm3,以50 mA·g-1的电流密度在3～4.3 V(vs Li/Li+)充放电时,首次放电比容量达172.5 mAh·g-1,首次放电效率高达90.9%,30个循环后其放电比容量依然保持在161.1 mAh·g-1.
이LiOH·H2O、Ni(OAc)2·4H2O、Co(OAc)2·4H2O화MnO2위원료,재수열반응부중예처리,연후진행고온고상반응,합성료일계렬리얼고맹양화물LiNi0.75-xCoxMn0.25O2(x=0.05,0.10,0.15,0.20,0.25).통과X사선연사(XRD)、소묘전자현미경(SEM)화전화학성능측시대소득양품적결구、형모、립경급전화학성능진행료표정.결과표명,당x=0.20시,소합성적정겁재료구유흔호적α-NaFeO2형층상정체결구,정포삼수α=0.2861 nm,c=1.4164 nm,V=0.1004 nm3,이50 mA·g-1적전류밀도재3～4.3 V(vs Li/Li+)충방전시,수차방전비용량체172.5 mAh·g-1,수차방전효솔고체90.9%,30개순배후기방전비용량의연보지재161.1 mAh·g-1.