All-solid-state flexible supercapacitors fabricated with bacterial nanocellulose papers, carbon nanotubes, and triblock-copolymer ion gels.
We demonstrate all-solid-state flexible supercapacitors with high physical flexibility, desirable electrochemical properties, and excellent mechanical integrity, which were realized by rationally exploiting unique properties of bacterial nanocellulose, carbon nanotubes, and ionic liquid based polymer gel electrolytes. This deliberate choice and design of main components led to excellent supercapacitor performance such as high tolerance against bending cycles and high capacitance retention over charge/discharge cycles. More specifically, the performance of our supercapacitors was highly retained through 200 bending cycles to a radius of 3 mm. In addition, the supercapacitors showed excellent cyclability with C(sp) (~20 mF/cm(2)) reduction of only <0.5% over 5000 charge/discharge cycles at the current density of 10 A/g. Our demonstration could be an important basis for material design and development of flexible supercapacitors.
Department of Materials Science and Engineering, Korea University, Seoul 136-713, Republic of Korea.
Yu Jin
YJ
Kang
Sang-Jin
SJ
Chun
Sung-Suk
SS
Lee
Bo-Yeong
BY
Kim
Jung Hyeun
JH
Kim
Haegeun
H
Chung
Sun-Young
SY
Lee
Woong
W
Kim
D002482:Cellulose; D025802:Electric Capacitance; D005782:Gels; D041822:Gluconacetobacter xylinus / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D037742:Nanotubes, Carbon / Q000648:ultrastructure; D010209:Paper; D011108:Polymers
D005782:Gels; D037742:Nanotubes, Carbon; D011108:Polymers; D002482:Cellulose