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Rational Design of a Flexible CNTs@PDMS Film Patterned by Bio‐Inspired Templates as a Strain Sensor and Supercapacitor
Author(s) -
Zhang Chenjun,
Li Hui,
Huang Aoming,
Zhang Qiao,
Rui Kun,
Lin Huijuan,
Sun Gengzhi,
Zhu Jixin,
Peng Huisheng,
Huang Wei
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201805493
Subject(s) - materials science , supercapacitor , capacitance , polydimethylsiloxane , carbon nanotube , electrode , composite material , bioelectronics , nanotechnology , bending , flexible electronics , microstructure , polyaniline , layer (electronics) , substrate (aquarium) , polymer , biosensor , chemistry , oceanography , geology , polymerization
Flexible devices integrated with sensing and energy storage functions are highly desirable due to their potential application in wearable electronics and human motion detection. Here, a flexible film is designed in a facile and low‐cost leaf templating process, comprising wrinkled carbon nanotubes (CNTs) as the conductive layer and patterned polydimethylsiloxane (PDMS) with bio‐inspired microstructure as a soft substrate. Assembled from wrinkled CNTs on patterned PDMS film, a strain sensor is realized to possess sensitive resistance response against various deformations, producing a resistance response of 0.34%, 0.14%, and 9.1% under bending, pressing, and 20% strain, respectively. Besides, the strain sensor can reach a resistance response of 3.01 when stretched to 44%. Furthermore, through the electro‐deposition of polyaniline, the CNTs film is developed into a supercapacitor, which exhibits a specific capacitance of 176 F g −1 at 1 A g −1 and a capacitance retention of 88% after 10 000 cycles. In addition, the fabricated supercapacitor shows super flexibility, delivering a capacitance retention of 98% after 180° bending for 100 cycles, 95% after 45° twisting for 100 cycles, and 98% after 100% stretching for 400 cycles. The superior capacitance stability demonstrates that the design of wrinkled CNTs‐based electrodes fixed by microstructures is beneficial to the excellent electrochemical performance.