高性能磷酸钴纳米片的制备

Synthesis of High-performance Cobalt Phosphate Nanoflakes

基于关键原子可控集聚技术和纳米结构排列导向技术两大核心技术,通过调整物料配比、优化配料顺序、确定反应温度、调整压力时间、物相分离分析等研制出高能量、超稳定、强韧性纳米磷酸钴新材料。在三电极体系中表征了Co_(3)(PO_(4))_(2)的电化学性能,在1.0 Ag^(-1)的电流密度下,Co_(3)(PO_(4))_(2)的比电容为410 Fg^(-1)。采用PVA-KOH凝胶电解质制备了柔性对称超级电容器,在电流密度为0.5 Ag^(-1)时的比电容为165 Fg^(-1),在功率密度为756W kg^(-1)时的高能量密度为52.8 Wh kg^(-1)。结果表明,Co_(3)(PO_(4))_(2)纳米片在高性能柔性储能器件中具有广阔的应用前景。

Based on key atomic controllable agglomeration technology and nano structure arrangement orientation technology,after the process of optimizing the ingredients order,determining the reaction temperature,adjusting the pressure time and phase separation analysis,Co_(3)(PO_(4))_(2) nanoflakeswith high-energy,high-stability and strong-toughness properties were were successfully synthesized.The electrochemical performance of as-synthesized Co_(3)(PO_(4))_(2) was firstly characterized in a three-electrode system,which shows the specific capacitance of 410 Fg^(-1) at the current density of 1.0 Ag^(-1).Furthermore,flexible symmetric supercapacitor was fabricated with PVA-KOH gel electrolyte,exhibiting the specific capacitance of 165 Fg^(-1) at a current density of 0.5 Ag^(-1) with a high energy density of 52.8 Wh kg^(-1) at a power density of 756W kg^(-1).These excellent results suggested that Co_(3)(PO_(4))_(2) nanoflakes are promising materials for potential application in high-performance flexible energy storage devices.