Jabuticaba‐Inspired Hybrid Carbon Filler/Polymer Electrode for Use in Highly Stretchable Aqueous Li‐Ion Batteries

Stretchable electronics are considered as next‐generation devices; however, to realize stretchable electronics, it is first necessary to develop a deformable energy device. Of the various components in energy devices, the fabrication of stretchable current collectors is crucial because they must be...

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Bibliographic Details
Published in:Advanced energy materials 2018-04, Vol.8 (10), p.n/a
Main Authors: Song, Woo‐Jin, Park, Jeonghwan, Kim, Dong Hyup, Bae, Sohyun, Kwak, Myung‐Jun, Shin, Myoungsoo, Kim, Sungho, Choi, Sungho, Jang, Ji‐Hyun, Shin, Tae Joo, Kim, So Youn, Seo, Kwanyong, Park, Soojin
Format: Article
Language:English
Subjects:
Accumulators
aqueous lithium‐ion batteries
Carbon
Carbon black
Carbon nanotubes
Deformation
Electrical resistivity
Electronics
Fillers
Formability
hybrid carbon fillers
in situ small angle X‐ray scattering analysis
Lithium
polymer nanocomposite
Polymers
Rechargeable batteries
Strain
stretchable energy storage devices
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Summary:Stretchable electronics are considered as next‐generation devices; however, to realize stretchable electronics, it is first necessary to develop a deformable energy device. Of the various components in energy devices, the fabrication of stretchable current collectors is crucial because they must be mechanically robust and have high electrical conductivity under deformation. In this study, the authors present a conductive polymer composite composed of Jabuticaba‐like hybrid carbon fillers containing carbon nanotubes and carbon black in a simple solution process. The hybrid carbon/polymer (HCP) composite is found to effectively retain its electrical conductivity, even when under high strain of ≈200%. To understand the behavior of conductive fillers in the polymer matrix when under mechanical strain, the authors investigate the microstructure of the composite using an in situ small‐angle X‐ray scattering analysis. The authors observe that the HCP produces efficient electrical pathways for filler interconnections upon stretching. The authors develop a stretchable aqueous rechargeable lithium‐ion battery (ARLB) that utilizes this HCP composite as a stretchable current collector. The ARLB exhibits excellent rate capability (≈90 mA h g−1 at a rate of 20 C) and outstanding capacity retention of 93% after 500 cycles. Moreover, the stretchable ARLB is able to efficiently deliver power even when under 100% strain. Jabuticaba‐like carbon filler/polymer composite is demonstrated as a stretchable electrode with excellent mechanical durability under strain. The percolation behavior of conductive fillers is determined using in situ small angle X‐ray scattering. We have developed stretchable aqueous Li‐ion batteries with high performance (~90 mA h g−1 at a rate of 20 C and capacity retention of 80% at a strain of 100%).
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.201702478