CAJ | 학술논문

以LiOH·H2O、Ni(CH3COO)2·4H2O和Mn(CH3COO)2·4H2O为原料,H2C2O4·H2O为沉淀剂,NH3·H2O为络合剂,通过草酸共沉淀法合成了正极材料LiNi0.5Mn1.5O4.分析了煅烧温度、煅烧时间及锂过量对产物性能的影响.在850℃下煅烧16 h,锂过量10%合成的产物,具有立方尖晶石结构、规则的八面体晶形,0.1 C首次放电比容量为133.0 mAh/g,第30次循环时仍有129.0 mAh/g,放电平台为4.7 V,4 V放电平台几乎消失.
이LiOH·H2O、Ni(CH3COO)2·4H2O화Mn(CH3COO)2·4H2O위원료,H2C2O4·H2O위침정제,NH3·H2O위락합제,통과초산공침정법합성료정겁재료LiNi0.5Mn1.5O4.분석료단소온도、단소시간급리과량대산물성능적영향.재850℃하단소16 h,리과량10%합성적산물,구유립방첨정석결구、규칙적팔면체정형,0.1 C수차방전비용량위133.0 mAh/g,제30차순배시잉유129.0 mAh/g,방전평태위4.7 V,4 V방전평태궤호소실.
Cathode material LiNi0.5Mn1.5O4 was synthesized via oxalate co-precipitation process using LiOH·H2O,Ni(CH3COO)2 ·4H2O and Mn(CH3COO)2·4H2O as raw materials，H2C2O4·H2O as precipitant，NH3·H2O as complexing agent．The effects of calcining temperature.calcining time and lithium excess amount on the performance of the products were analyzed.When calcining at 850℃ for 16 h and using excess 10% lithium,the synthesized product had cubic spinel structure,clearly defined octahedral shape.Its 0.1 C initial specific discharge capacity was 133.0 mAh/g and retained 129.0 mAh/g at the 30th cycle,its discharge plateau was 4.7 V,the 4 V discharge plateau almost disappeared.