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Title: A bamboo-inspired nanostructure design for flexible foldable and twistable energy storage devices

Journal Article · · Nano Letters
 [1];  [2];  [3];  [4];  [3];  [3];  [3];  [3];  [5];  [3];  [5];  [3];  [4];  [3];  [6]
  1. Huazhong Univ. of Science and Technology, Wuhan (China); Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. Huazhong Univ. of Science and Technology, Wuhan (China)
  4. Stanford Univ., Stanford, CA (United States)
  5. Univ. of Jinan, Jinan (China)
  6. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Flexible 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. 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. Furthermore, 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. As a result, such a unique supercapacitor holds great promise for high-performance flexible electronics.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1185032
Report Number(s):
SAND-2014-20710J; 553941
Journal Information:
Nano Letters, Vol. 15, Issue 6; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 260 works
Citation information provided by
Web of Science

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Electrospun N-Doped Porous Carbon Nanofibers Incorporated with NiO Nanoparticles as Free-Standing Film Electrodes for High-Performance Supercapacitors and CO 2 Capture journal March 2018
Green Synthesis of Hierarchically Porous Carbon Nanotubes as Advanced Materials for High-Efficient Energy Storage journal February 2018
Porous ultrathin carbon nanobubbles formed carbon nanofiber webs for high-performance flexible supercapacitors journal January 2017
Conjugated Polymers for Flexible Energy Harvesting and Storage journal February 2018
Ultrathin NiCo 2 S 4 @graphene with a core–shell structure as a high performance positive electrode for hybrid supercapacitors journal January 2018
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Recent Advances in Designing and Fabricating Self-Supported Nanoelectrodes for Supercapacitors journal July 2017
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Activated Carbon from Biomass Transfer for High-Energy Density Lithium-Ion Supercapacitors journal July 2016
Flexible Sodium-Ion Pseudocapacitors Based on 3D Na 2 Ti 3 O 7 Nanosheet Arrays/Carbon Textiles Anodes journal April 2016
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