1 引言
2 结果与讨论
2.1 CPCN的熟化时间
图1 (a) CPCN样品的SEM图; (b) CPCN局部SEM图和SEM-EDS元素映射图; (c) CPCN冻干粉末; (d) TiO2纳米晶薄膜; (e)电池图片; (f)电池组装流程图Figure 1 (a) SEM image of the CPCN sample; (b) CPCN local SEM diagram and SEM-EDS element mapping; (c) Lyophilized CPCN powder; (d) TiO₂ nanocrystal films; (e) Pictures of the battery; (f) Schematic diagram of device fabrication process |
图2 (a) 工作状态下照片; (b) 不同熟化时间CPCN样品的CV曲线; EIS测试结果: (c) 熟化1个月(CN1); (d) 熟化3个月(CN3); (e) 熟化8个月(CN8); (f) 熟化10个月(CN10); (g) 拟合的Rct值; 不同熟化时间CPCN样品的光超级电容器光生电荷存储性能: (h) 光生电荷存储容量; (i) 库伦效率. 辐照条件为模拟AM 1.5太阳光(100 mW•cm-2)Figure 2 (a) Operational state photograph; (b) CV curves of CPCN samples with different maturation times; EIS test results: (c) 1 month of maturation (CN1); (d) 3 months of maturation (CN3); (e) 8 months of maturation (CN8); (f) 10 months of maturation (CN10); (g) Fitted Rct values; Photogenerated charge storage performance of photo-supercapacitors in CPCN samples with different maturation times: (h) Photogenerated charge storage capacity; (i) Coulombic efficiency. The irradiation conditions were simulated AM 1.5 sunlight (100 mW•cm-2) |
2.2 二氧化钛层的厚度
图4 不同TiO2厚度下所获得的储能性能: (a) CV曲线; (b)光照与暗态下的电荷存储容量; (c) Clight/Cdark值; (d)光照与暗态下的库伦效率. 辐照条件为模拟AM 1.5太阳光(100 mW•cm-2)Figure 4 Energy storage performance obtained under different TiO2 thicknesses: (a) CV curve; (b) Charge storage capacity under illumination and dark conditions; (c) Clight/Cdark values; (d) Coulombic efficiency under illumination and dark conditions. The irradiation conditions were simulated AM 1.5 sunlight (100 mW•cm-2) |
2.3 电极面积
图5 不同电极面积下所获得的储能性能: (a) CV曲线; (b) Nyquist图(插图为拟合值Rd和Rct值); (c)光生电荷存储容量对面积(Se)的影响; (d)每平方厘米光生电荷存储容量. 辐照条件为模拟AM 1.5太阳光(100 mW•cm-2)Figure 5 Energy storage performance obtained under different electrode areas: (a) CV curve; (b) Nyquist plot (inset showing fitted values Rd and Rct); (c) Effect of photogenerated charge storage capacity on area (Se); (d) Photogenerated charge storage capacity per square centimeter. The irradiation conditions were simulated AM 1.5 sunlight (100 mW•cm-2) |
2.4 电池的串并联模式
图8 不同面积单体电池并联组件: (a) CV曲线; (b)光生电荷存储容量; (c)质量比容量. 辐照条件为模拟AM 1.5太阳光(100 mW•cm-2)Figure 8 Parallel components of single cells with different areas: (a) CV curves; (b) photogenerated charge storage capacity; (c) Mass specific capacity. The irradiation conditions were simulated AM 1.5 sunlight (100 mW•cm-2) |