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A Highly Stretchable Microsupercapacitor Using Laser‐Induced Graphene/NiO/Co 3 O 4 Electrodes on a Biodegradable Waterborne Polyurethane Substrate
Author(s) -
Wang Wentao,
Lu Longsheng,
Xie Yingxi,
Yuan Wei,
Wan Zhenping,
Tang Yong,
Teh Kwok Siong
Publication year - 2020
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.201900903
Subject(s) - materials science , electrode , graphene , capacitance , substrate (aquarium) , non blocking i/o , polyurethane , stretchable electronics , nanotechnology , adhesion , triboelectric effect , composite material , optoelectronics , electronics , electrical engineering , biochemistry , chemistry , oceanography , engineering , geology , catalysis
Abstract Constructing microsupercapacitors (MSCs) with an outstanding stretchability is urgent for wearable electronics, and an intrinsic biodegradability is also meaningful. Herein, laser‐induced graphene/NiO/Co 3 O 4 (NiO/Co 3 O 4 /LIG) is in situ synthesized on a polyimide (PI) film during laser processing, then the electrodes are transferred to a biodegradable waterborne polyurethane (WPU) substrate to fabricate stretchable MSCs. Experimentally, the as‐prepared stretchable MSCs exhibit an excellent areal capacitance of 2.4 mF cm −2 , high capacitance retention of 77.1% at 50% strain, and capacitance degradation of less than 19.8% after 1000 stretching cycles. These desirable properties are mainly attributed to the gradient structure of NiO/Co 3 O 4 /LIG, the synergistic effect of hybrid NiO/Co 3 O 4 nanoparticles, and the intensive interface adhesion between the electrodes and WPU. Interestingly, the robust function of stretchable MSCs is further presented by using them to power a microsensor and assembling them with triboelectric nanogenerators to generate power from mechanical contact with skin, which makes the stretchable MSCs promising as a sustainable driving source for wearable electronics.