CAJ | 학술논문

研究了一次粒径和二次粒径对磷酸亚铁锂性能的影响。分别采用扫描电子显微镜(SEM)、激光粒度仪等分析了材料的一次粒径和二次粒径。将材料装配成扣式电池进行一系列的电化学特性测试，分析磷酸亚铁锂材料的充放电循环性能、氧化还原电位、阻抗等性能。研究发现一次粒径主要影响磷酸亚铁锂材料的放电容量、放电电位和阻抗，对材料的振实密度影响视其团聚程度而定；二次粒径对磷酸亚铁锂材料的振实密度影响很大。
연구료일차립경화이차립경대린산아철리성능적영향。분별채용소묘전자현미경(SEM)、격광립도의등분석료재료적일차립경화이차립경。장재료장배성구식전지진행일계렬적전화학특성측시，분석린산아철리재료적충방전순배성능、양화환원전위、조항등성능。연구발현일차립경주요영향린산아철리재료적방전용량、방전전위화조항，대재료적진실밀도영향시기단취정도이정；이차립경대린산아철리재료적진실밀도영향흔대。
The influences of primary particle size and secondary size on the performance of lithium iron phosphate were studied. Scanning electron microscope (SEM) and laser particle size analyzer were employed to characterize the primary particle size and secondary size of lithium iron phosphate samples. The lithium iron phosphate samples were assembled to form the button batteries for the test of the electrochemical features of the samples, such as charge-discharge cycle performance, oxidation-reduction potentials and impedance. At last, it was concluded as following:primary particle size is significant for discharge capacity, discharge potential and impedance except for tap density;the tap density dependents on secondary particle size essentially. And for a high volumetric energy density lithium iron phosphate, what requirements must be met was proposed.