Buckling Structured Stretchable Pseudocapacitor Yarn.

ABSTRACT: Cable-type stretchable electrochemical pseudocapacitors based on multi-walled carbon nanotube (MWCNT) sheets and two different metal oxide nanopowders (NP), i.e., MnO₂ and RuO₂ are developed using a newly-devised dry painting method to mechanically fix the NP to the elastic rubber-based MWCNT electrode substrate, resulting in a porous buckling structured pseudocapacitor yarn. Highly stretchable stylene-ethylene/butylene-stylene (SEBS) is used as the supporting elastomeric core for wrapping with the MWCNT sheets and the electroactive NP. The dry painting can successfully deposit NP on the soft SEBS surface, which is normally an unfavorable substrate for coating alien materials. The resulting yarn-type pseudocapacitor, composed of eight-layered MWCNT sheets, three-layered RuO₂, and two-layered MnO₂, showing a diameter of approximately 400 ?m with a porous buckling structure, records a specific capacitance of 25?F?g^-1. After being stretched by 200% in strain with no sacrifice of the porous buckling structure, the cable-type stretchable electrochemical pseudocapacitor yarn retains its electrical capacity, and is potentially applicable to energy storage devices for wearable electronics.

SUBMITTER: Lee DW 

PROVIDER: S-EPMC5607238 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature