摘要
用共沉淀法合成纳米磷酸铁（FePO4）颗粒，并分别在380℃、460℃、550℃及650qC下煅烧3h。对样品的结构和形貌用XRD和场发射扫描电子显微进行分析，对组装的钠离子电池的电化学性能进行循环伏安、电化学阻抗谱和恒流充放电测试。在550℃下煅烧的FeP04样品具有一定的结晶度，电化学性能最好，以0．1G在1．5—4．2V充放电，首次和第20次循环的放电比容量分别为148．5mAh／g、134．8mAh／g。
Nano-sized iron phosphate （FePO4 ）particle was synthesized by co-precipitation method, then sintered at 380 ℃ ,460 ℃, 550 ＇E and 650 ℃ for 3 h,respectively. The structure and morphology of sample were analyzed by means of XRD and field emission- scanning dectron microscopy （ FE-SEM）, the electrochemical performance of assembled sodium-ion battery was tested by cyclic vohammetry （CV）, electrochemical impedance spectroscopy （EIS）and galvanostatic charge-discharge tests. The electrochemical performance of sample sintered at 550 ℃ with a certain degree of crystaUization was the best. When charged-discharged in 1.5 - 4. 2 V with 0. 1 C, the specific discharge capacity in initial and 20th cycle was 148.5 mAh/g, 134. 8mAh/g,respectively.
出处
《电池》
CAS
CSCD
北大核心
2013年第6期314-317,共4页
Battery Bimonthly
基金
上海市科委基础重点项目(13NM1401400)
