蒸发干燥法制备LiNi_(0.5)Mn_(1.5)O_(4)正极材料  

LiNi_(0.5)Mn_(1.5)O_(4)cathode materials prepared by evaporation-drying method

作　　者：董怡辰 王振波 DONG Yichen;WANG Zhenbo(Department of Chemical Engineering,Hulunbeier Vocational Technical College,Hulunbeier Neimenggu 021000;School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin Heilongjiang 150001,China)

机构地区：[1]呼伦贝尔职业技术学院化学工程系,内蒙古呼伦贝尔021000 [2]哈尔滨工业大学化工与化学学院,黑龙江哈尔滨150001

出　　处：《蓄电池》2024年第4期151-155,共5页Chinese LABAT Man

基　　金：内蒙古自治区2023年度教育科学规划课题(NZJGH2023001)。

摘　　要：以LiNO_(3)、Ni(NO_(3))_(2)·6H_(2)O和Mn(CH_(3)COO)_(2)·4H_(2)O为原料,采用蒸发干燥法制备锂电池用LiNi_(0.5)Mn_(1.5)O_(4)正极材料。将原料在玛瑙研钵中研磨后置于100℃水浴盆中。待固体物料溶解后,在混合物中加入的无水乙醇和浓度为15.0 mol·L^(-1)的氨水,伴随机械搅拌。将混合物置于120℃的真空干燥室中,干燥2 h(始终在真空氛围中)以获得前驱体。把前驱体放在400℃空气中煅烧4 h,分解硝酸盐和醋酸盐,接着在不同温度的氧气中煅烧6 h,合成LiNi_(0.5)Mn_(1.5)O_(4)材料。将合成的LiNi_(0.5)Mn_(1.5)O_(4)材料放在600℃氧气氛围中退火氧化2 h,再冷却至室温。通过电化学测试得到,在烧结温度800℃,烧结时间6 h的条件下合成的LiNi_(0.5)Mn_(1.5)O_(4)正极材料具有较高的锂插层容量和良好的循环稳定性。To prepare LiNi_(0.5)Mn_(1.5)O_(4)by the solution evaporation method,LiNO_(3),Ni(NO_(3))_(2)·6H_(2)O and Mn(CH_(3)COO)_(2)·4H_(2)O were used as the raw material.After grinding in agate mortar,put them in waterbath pot at 100℃,joined some ethanol and ammonia water of 15.0 mol/L with mechanical agitation.Dried them at 120℃for 2h in vacuum drying oven,then the mixture was calcined at 400℃for 4 h in oxygen atmosphere to decompose nitrate and acetate,the precursor was sintered at different temperatures for 6 h in oxygen atmosphere and then calcined at 600℃for 2 h in oxygen atmosphere to turn into product.Electrochemical test results show that the cathode material prepared at 800℃for 6 h has the best cycle reversibility,the highest discharge capacity,and the optimal capacity retention.

关 键 词：LiNO_(3) Ni(NO_(3))_(2)·6H_(2)O Mn(CH_(3)COO)_(2)·4H_(2)O LiNi_(0.5)Mn_(1.5)O_(4) 锂电池 正极材料 插层容量 蒸发干燥法 

分 类 号：TM912.2[电气工程—电力电子与电力传动]