共沉淀法优化高镍LiNi0.834Co0.11Mn0.056O2正极材料的结构和性能
Structure and properties of high nickel LiNi0.834Co0.11Mn0.056O2 cathode material optimized by the coprecipitation method
摘要
Abstract
[Purposes]In order to find the optimum synthesis conditions,the technological parameters of the high nickel precursor Ni0.834Co0.11Mn0.056(OH)2 in the coprecipitation processes were analyzed.Moreover,the effects on the properties of the corresponding cathodes were also been investigated.[Methods]The precursor and the corresponding cathode materials were synthesized at different ammonia concentrations and pH in the reaction solutions.In addition,the influence of the process parameters on the structural,micro-morphological and electrochemical properties was analyzed.[Findings]Under the conditions of the ammonia concentration of 1 1 g/L and the pH of 11.0,the prepared LiNi0.834Co0.11Mn0.056O2 cathode material possesses dense primary particles,high sphericity,and moderate particle size,delivering best electrochemical properties.The first specific discharge capacity at 0.1 C is 205.6 mAh/g and the Coulombic efficiency of the first cycle is 88.74％.Moreover,the specific discharge capacity is 150.7 mAh/g at the high current density of 10.0 C.Meanwhile,the capacity retention is still up to 80.18％after 300 cycles at 1.0 C.[Conclusions]The ammonia concentration and the pH of the reaction solution both alter the morphology,the particle size,and the composition of the precursor by affecting the solution oversaturation and thus influencing the nucleation and the growth of the crystal.The cathode material inherits the morphological characteristics of the corresponding precursors and its electrochemical properties are affected by the precursor synthesis process.关键词
共沉淀法/前驱体/工艺条件/高镍三元正极材料/电化学性能Key words
coprecipitation method/precursor/process condition/high nickel ternary cathode material/electrochemical property分类
信息技术与安全科学引用本文复制引用
曲亚东,蒋明珠,赵子祥,苗子墨,郑旭日,苏欢,邹康宇,李灵均..共沉淀法优化高镍LiNi0.834Co0.11Mn0.056O2正极材料的结构和性能[J].长沙理工大学学报（自然科学版）,2024,21(4):81-90,114,11.基金项目
国家自然科学基金资助项目(51774051、52204306) （51774051、52204306）
湖南省杰出青年基金资助项目(2023JJ10044) （2023JJ10044）
湖南省湖湘青年英才资助项目(2019RS2034) （2019RS2034）
湖南省高新技术产业科技创新先导计划资助项目(2020GK2072) （2020GK2072）
湖南省自然科学基金资助项目(2023JJ40014) （2023JJ40014）
湖南省普通高等学校教学改革研究项目(HNJG-2020-0265) Projects(51774051,52204306)supported by the National Natural Science Foundation of China （HNJG-2020-0265）
Project(2023JJ10044)supported by Outstanding Youth Foundation of Hunan Province （2023JJ10044）
Project(2019RS2034)supported by Science and Technology Planning Project of Hunan Province （2019RS2034）
Project(2020GK2072)supported by Hunan High-Tech Industry Science and Technology Innovation Leading Plan （2020GK2072）
Project(2023JJ40014)supported by Natural Science Foundation of Hunan Province （2023JJ40014）
Project(HNJG-2020-0265)supported by Teaching Reform Research Project of Colleges and Universities of Hunan Province （HNJG-2020-0265）
