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Issue 33, 2017
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Sulfur and nitrogen co-doped holey graphene aerogel for structurally resilient solid-state supercapacitors under high compressions

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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 next-generation electronic systems, structurally resilient solid-state supercapacitors (SRSSs) with sustainable conductivities and electrochemical performances under large compressions are a promising candidate. Here, we report a synthetic porous framework of a nitrogen and sulfur co-doped holey graphene aerogel (NS-HGA) for SRSSs under high compression loadings. Such a covalently interconnected holey graphene nano-architecture co-doped with nitrogen (3.11%) and sulfur (1.87%) has a greatly improved resilient structural integrity, with 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 a SRSS with good rate capability and almost unaltered capacitance even at 50% compression, with good durability for 200 cycles. Interestingly, when four NS-HGA:SRSSs were integrated into series, a bright green LED was illuminated even after charging for very few seconds. The proposed dual heteroatom-doped holey graphene aerogel, devoid of any pseudocapacitive materials, can be successfully used for high compression-permissive SRSSs in the modern era of wearable and soft elastic electronics.

Graphical abstract: Sulfur and nitrogen co-doped holey graphene aerogel for structurally resilient solid-state supercapacitors under high compressions

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Publication details

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


Article type: Communication
DOI: 10.1039/C7TA05237E
Citation: J. Mater. Chem. A, 2017,5, 17253-17266
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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, 5, 17253
    DOI: 10.1039/C7TA05237E

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