电子元件与材料2024，Vol.43Issue(7)：757-763,7.DOI:10.14106/j.cnki.1001-2028.2024.0120
微纳米磷酸铁锂的旋风分离及其储能性能
Cyclone separation and energy storage performance of micro-nano lithium iron phosphate
摘要
Abstract
In order to address the environmental pollution and climate change and achieve carbon neutrality,low-carbon technologies become the mainstream for the development of new energy vehicles.Owing to its high chemical stability,longevity,considerable theoretical capacity(170 mAh·g-1),eco-friendliness,and cost-effectiveness,lithium iron phosphate(LiFePO4)is favored as the cathode material for Li-ion batteries.Nonetheless,pure LiFePO4 materials faces some challenges such as slow ion diffusion and poor electronic conductivity.Strategies like particle size reduction and carbon coating have been proven effective in mitigating these issues.In this work,micro-nano-sized spherical LiFePO4 particles with uniform size distribution and consistent carbon coating was synthesized(LFP@C-X3)through spray drying and cyclone separation techniques.LFP@C-X3 demonstrated superior electrochemical performance at 0.1C rate,with initial discharge capacity of 151.3 mAh·g-1.After 100 cycles at 0.5C rate,a capacity of 132.6 mAh·g-1 was maintained with capacity retention rate of 97.9％.The enhanced performance is ascribed to that the electron/ion transport pathways was shortened by the micro-nano spherical particles,the conductivity of the material was improved,and the overall electrochemical efficacy was boosted.Our findings confirm the effectiveness of the cyclone separation technique in fine-tuning particle size and distribution,thereby the electrochemical properties of LFP materials is enhanced,which has promising application prospects.关键词
磷酸铁锂/喷雾干燥/旋风分离/电化学/粒径Key words
lithium iron phosphate/spray drying/cyclone separation/electrochemical/particle size分类
化学化工引用本文复制引用
陈冲,罗春晖,赵强,金央,李军,闫康平..微纳米磷酸铁锂的旋风分离及其储能性能[J].电子元件与材料,2024,43(7):757-763,7.基金项目
国家自然科学基金青年基金(22108185) （22108185）
川大-遂宁校市合作科技项目(2021CDSN-06) （2021CDSN-06）
