The George and Josephine Butler Polymer Research Laboratory, Department of Chemistry and Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611-7200, United States.
ACS Appl Mater Interfaces. 2010 Dec;2(12):3586-93. doi: 10.1021/am1007744. Epub 2010 Nov 22.
We report on the electrochemical and capacitive behaviors of poly(2,2-dimethyl-3,4-propylene-dioxythipohene) (PProDOT-Me2) films as polymeric electrodes in Type I electrochemical supercapacitors. The supercapacitor device displays robust capacitive charging/discharging behaviors with specific capacitance of 55 F/g, based on 60 μg of PProDOT-Me2 per electrode, that retains over 85% of its storage capacity after 32 000 redox cycles at 78% depth of discharge. Moreover, an appreciable average energy density of 6 Wh/kg has been calculated for the device, along with well-behaved and rapid capacitive responses to 1.0 V between 5 to 500 mV s(-1). Tandem electrochemical supercapacitors were assembled in series, in parallel, and in combinations of the two to widen the operating voltage window and to increase the capacitive currents. Four supercapacitors coupled in series exhibited a 4.0 V charging/discharging window, whereas assembly in parallel displayed a 4-fold increase in capacitance. Combinations of both serial and parallel assembly with six supercapacitors resulted in the extension of voltage to 3 V and a 2-fold increase in capacitive currents. Utilization of bipolar electrodes facilitated the encapsulation of tandem supercapacitors as individual, flexible, and lightweight supercapacitor modules.
我们报告了聚（2,2-二甲基-3,4-亚丙基二氧噻吩）（PProDOT-Me2）薄膜作为 I 型电化学超级电容器中聚合物电极的电化学和电容行为。超级电容器器件显示出稳健的电容充/放电行为，基于每个电极 60 μg 的 PProDOT-Me2，具有 55 F/g 的比电容，在 78%深度放电下经过 32000 次氧化还原循环后，其存储容量保留超过 85%。此外，该器件的平均能量密度达到 6 Wh/kg，并且在 5 至 500 mV s(-1)之间具有良好的和快速的电容响应，达到 1.0 V。串联、并联和两者组合的电化学超级电容器被组装在一起，以拓宽工作电压窗口并增加电容电流。四个超级电容器串联可实现 4.0 V 的充/放电窗口，而并联组装则可使电容增加 4 倍。串联和并联组合与六个超级电容器相结合，可将电压扩展至 3 V，并使电容电流增加 2 倍。双极电极的利用促进了串联超级电容器作为单个、灵活和轻便的超级电容器模块的封装。
