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蒸发干燥法制备LiNi0.5Mn1.5O4正极材料

LiNi0.5Mn1.5O4 cathode materials prepared by evaporation-drying method

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以LiNO3、Ni(NO3)2·6H2O和Mn(CH3COO)2·4H2O为原料,采用蒸发干燥法制备锂电池用LiNi0.5Mn1.5O4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的氦水,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LiNi0.5Mn1.5O4材料.将合成的LiNi0.5Mn1.5O4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LiNi0.5Mn1.5O4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 LiNi0.5Mn1.5O4 by the solution evaporation method,LiNO3,Ni(NO3)2·6H2O and Mn(CH3COO)2·4H2O were used as the raw material.After grinding in agate mortar,put them in water-bath 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.

LiNO3Ni(NO3)2.6H2OMn(CH3COO)2.4H2OLiNi0.5Mn1.5O4lithium-ion batterycathode materialsintercalation capacitysolution evaporation method

董怡辰、王振波

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呼伦贝尔职业技术学院化学工程系,内蒙古呼伦贝尔 021000

哈尔滨工业大学化工与化学学院,黑龙江哈尔滨 150001

LiNO3 Ni(NO3)2·6H2O Mn(CH3COO)2·4H2O LiNi0.5Mn1.5O4 锂电池 正极材料 插层容量 蒸发干燥法

内蒙古自治区2023年度教育科学规划课题

NZJGH2023001

2024

蓄电池
沈阳蓄电池研究所

蓄电池

影响因子：0.385
ISSN：1006-0847
年,卷(期)：2024.61(4)
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