Journal
ACS NANO
Volume 13, Issue 8, Pages 8936-8945Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b02690
Keywords
shape-adaptive; self-healing; triboelectric nanogenerators; soft electronics; putty
Categories
Funding
- National Key Research and Development Program of China [2016YFA0202703]
- National Natural Science Foundation of China [51432005, 61574018, 51603013]
- Youth Innovation Promotion Association of CAS
- Hundred Talents Program of CAS
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The viable application of soft electronics/robotics relies on the development of power devices which are desired to be flexible, deformable, or even self-healable. We report here a shape-adaptive, self-healable triboelectric nanogenerator (SS-TENG) for harvesting biomechanical energies. The use of a viscoelastic polymer, normally known as Silly Putty, as the electrification material and as the matrix of a carbon-nanotube-filled composite (CNT-putty) electrode endows the SS-TENG the capability of adapting to arbitrary irregular surfaces and instantaneous healing from mechanical damage (almost completely recovered in 3 min without extra stimuli). Furthermore, the output performances of the SS-TENG have also been significantly improved because (i) the ideal soft contact is achieved at the solid-solid interfaces for more effective contact electrification and (ii) the introduced cation dopants make the putty even more tribo-negative than polytetrafluoroethylene. The SS-TENG can be adhered to any curvy surface, tailored, and reshaped into arbitrary configurations and utilized as a power supply for small electronics, suggesting promising applications in soft electronics/robotics in the future.
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