Highly flexible, foldable, and rollable microsupercapacitors on an ultrathin polyimide substrate with high power density
Highly flexible, foldable, and rollable microsupercapacitors on an ultrathin polyimide substrate with high power density
复制标题
超薄聚酰亚胺基板上具有高功率密度的高度柔性、可折叠和可卷曲的微型超级电容器
DOI：
10.1038/s41378-018-0016-3
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发表时间：
2018-07-30
影响因子：
7.9
通讯作者：
Komvopoulos, Kyriakos
中科院分区：
文献类型：
--
作者：
Pu, Juan;Wang, Xiaohong;Komvopoulos, Kyriakos
通过实验和有限元模拟证明了具有平面叉指电极的极其灵活的、可折叠的和可卷曲的微型超级电容器（MSC）的设计和功能，所述平面叉指电极由在聚酰亚胺衬底上的单壁碳纳米管（SWCNT）网络组成。全固态MSC可以可逆地弯曲、折叠和纯弹性地卷起，而不会降低其电性能。模拟结果证实，在弯曲，折叠，和滚动MSC的变形是纯弹性的。本发明的MSC的高功率密度（1125 W cm-3）和小时间常数（1 ms）与铝电解电容器的功率密度和时间常数相当。MSC在高达1000 V s-1的扫描速率下工作，其特征在于18 F cm-3的体积电容和1.6 mWh cm-3的能量密度，并且即使在100，000次充电/放电循环后也表现出具有96%容量保持率的上级电化学稳定性。开发的MSC表现出很高的潜力，在灵活的和可穿戴的电子系统集成。
The design and functionality of extremely flexible, foldable, and rollable microsupercapacitors (MSCs) with in-plane interdigital electrodes that consist of single-walled carbon nanotube (SWCNT) networks on an ultrathin polyimide substrate are demonstrated through experiments and finite element simulations. The all-solid-state MSCs can be reversibly bent, folded, and rolled purely elastically without degradation of their electrical performance. The simulation results confirm that the deformation in bent, folded, and rolled MSCs is purely elastic. The high power density (1125 W cm–3) and small time constant (1 ms) of the present MSCs are comparable to those of aluminum electrolytic capacitors. The MSCs operate at scan rates of up to 1000 V s–1, are characterized by a volumetric capacitance of 18 F cm–3and an energy density of 1.6 mWh cm–3, and exhibit superior electrochemical stability with 96% capacity retention even after 100,000 charge/discharge cycles. The developed MSCs demonstrate high potential for integration in flexible and wearable electronic systems.