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Sulfur and Nitrogen Co-Doped Holey Graphene Aerogel for Structurally Resilient Solid-State Supercapacitors under High-Compressions

Abstract

Structural energy storage devices having load-bearing or stress-tolerant functionalities are crucial for designing wearable and soft electronics. In order to supply power to the next-generation electronic systems, structurally resilient solid-state supercapacitors (SRSS) with sustainable conductivities and electrochemical performances under large compressions can be a promising candidate. Here, we report a synthetic porous framework of nitrogen and sulfur co-doped holey graphene aerogels (NS-HGA) for SRSS under high-compression loadings. Such a covalently interconnected holey graphene nano-architecture co-doped with nitrogen (3.11%) and sulfur (1.87%) greatly improve resilient structural integrity having repeatable elasticity along with high compressive strength. Therefore, the NS-HGA featuring high electrolyte ion storage, unhindered ion channels, excellent conductivity (21.66 S m-1) and promising electrochemical performances, exhibits significantly high volumetric capacitance (203 mF cm-3) in the SRSS with good rate capability and almost unaltered capacitance even at 50% compression with good durability for 200 cycles. Interestingly, when four NS-HGA:SRSS were integrated into series, a bright green LED was illuminated even after charging very few seconds. The proposed dual heteroatom-doped holey graphene aerogels, devoid of any pseudocapacitive materials, can be successfully used for the high compression-permissive SRSS in the modern era of wearable and soft elastic electronics.

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Publication details

The article was accepted on 11 Jul 2017 and first published on 15 Jul 2017


Article type: Communication
DOI: 10.1039/C7TA05237E
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Sulfur and Nitrogen Co-Doped Holey Graphene Aerogel for Structurally Resilient Solid-State Supercapacitors under High-Compressions

    M. Kotal, H. Kim, S. Roy and I. Oh, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05237E

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