CAJ | 학술논문

采用柠檬酸溶胶-凝胶法合成了层状锂离子嵌入化合物LiV3 O8，用XRD、 SEM对其晶体结构和表面形貌进行表征，用循环伏安法对其嵌锂性能和扩散系数进行测定，用恒电流充放电法研究了电解液pH对电极可逆性及对模拟电池容量和循环性能的影响。结果显示，电解液pH ＝7时，电池的性能最优，首次放电比容量为81.0 mAh · g-1，40次后比容量保持率达89.1％。
채용저몽산용효-응효법합성료층상리리자감입화합물LiV3 O8，용XRD、 SEM대기정체결구화표면형모진행표정，용순배복안법대기감리성능화확산계수진행측정，용항전류충방전법연구료전해액pH대전겁가역성급대모의전지용량화순배성능적영향。결과현시，전해액pH ＝7시，전지적성능최우，수차방전비용량위81.0 mAh · g-1，40차후비용량보지솔체89.1％。
Layered lithium ion intercalation compound LiV 3 O8 was synthesized by citric acid sol -gel method.The crystal structure and surface morphology were characterized by XRD and SEM.The lithium intercalation properties and the diffusion coefficients of as prepared materials were tested by cyclic voltammetry.The effect of pH on the reversibility of electrode , battery capacity and cycle performance were studied by galvanostatic charge -discharge.The battery showed the best electrochemical performance with electrolyte pH =7.The first specific discharge capacity was 81 mAh· g-1 with a retention of 89.1%after 40 cycles.