Cyclone separation and energy storage performance of micro-nano lithium iron phosphate
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.
lithium iron phosphatespray dryingcyclone separationelectrochemicalparticle size
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