A High Performance Stretchable Asymmetric Fiber-Shaped Supercapacitor with a Core-Sheath Helical Structure

作者：Yu, Jiali; Lu, Weibang; Smith, Joseph P.; Booksh, Karl S.; Meng, Linghui; Huang, Yudong^*; Li, Qingwen; Byun, Joon-Hyung; Oh, Youngseok; Yan, Yushan; Chou, Tsu-Wei^*

来源：Advanced Energy Materials, 2017, 7(3): 1600976.

DOI：10.1002/aenm.201600976

• asymmetric configuration
• carbon nanotubes
• manganese oxides
• polypyrrole
• supercapacitors

The emerging fiber-shaped supercapacitors (FSSs) have motivated tremendous research interest in energy storage devices. However, challenges still exist in the pursuit of combination of excellent electrochemical performance and mechanical stretchability. Here, a core-sheath asymmetric FSS is first made by wrapping gel electrolyte coated carbon nanotube (CNT)@MnO2 core fiber with CNT@PPy composite film. Then a stretchable helical structure is formed by over-twisting the FSS. The resulted stretchable asymmetric FSS exhibits a specific capacitance of 60.435 mF cm(-2) at the scan rate of 10 mV s(-1) and the capacitance performance is well maintained during repeated stretching to 20% strain. Furthermore, a high energy density of 18.88Wh cm(-2) is achieved for the stretchable FSS due to its high specific capacitance and extended potential window of 1.5 V.

• 出版日期2017-2-8
• 单位哈尔滨工业大学; 中国科学院苏州纳米技术与纳米仿生研究所