Sun, Y.Sills, R.B.Hu, X.Seh, Z.W.Xiao, X.Xu, H.Luo, W.Jin, H.Xin, Y.Li, T.Zhang, Z.Zhou, J.Cai, W.Huang, Y.Cui, Y.2019-07-022019-07-022015Nano Letters: a journal dedicated to nanoscience and nanotechnology, 2015; 15(6):3899-39061530-69841530-6992http://hdl.handle.net/2440/119848Flexible energy storage devices are critical components for emerging flexible electronics. Electrode design is key in the development of all-solid-state supercapacitors with superior electrochemical performances and mechanical durability. Herein, we propose a bamboo-like graphitic carbon nanofiber with a well-balanced macro-, meso-, and microporosity, enabling excellent mechanical flexibility, foldability, and electrochemical performances. Our design is inspired by the structure of bamboos, where a periodic distribution of interior holes along the length and graded pore structure at the cross section not only enhance their stability under different mechanical deformation conditions but also provide a high surface area accessible to the electrolyte and low ion-transport resistance. The prepared nanofiber network electrode recovers its initial state easily after 3-folded manipulation. The mechanically robust membrane is explored as a free-standing electrode for a flexible all-solid-state supercapacitor. Without the need for extra support, the volumetric energy and power densities based on the whole device are greatly improved compared to the state-of-the-art devices. Even under continuous dynamic operations of forceful bending (90°) and twisting (180°), the as-designed device still exhibits stable electrochemical performances with 100% capacitance retention. Such a unique supercapacitor holds great promise for high-performance flexible electronics.en© 2015 American Chemical SocietyPoaceaePliabilityPorosityNanostructuresJournal article003007216310.1021/acs.nanolett.5b007380003563169000372-s2.0-84935875887358790Jin, H. [0000-0002-1950-2364]