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Issue 14, 2015
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High-performance lithium/sulfur batteries by decorating CMK-3/S cathodes with DNA

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Abstract

Prohibiting lithium polysulfides from being dissolved to electrolyte is the most critical challenge for pursuing high-performance Li/S batteries. Taking full advantage of interactions between polysulfides and functional groups of third-party additives has been proven to be an efficient strategy. In the present work, we selected DNA to decorate CMK-3/S cathodes. The –P[double bond, length as m-dash]O and [double bond, length as m-dash]N– sites of the constituent deoxyribonucleotides of DNA are demonstrated to be capable of anchoring polysulfides through our DFT calculations. The experimental results show that adding a small amount of DNA into the CMK-3/S composite significantly improved the cyclic performance. In particular, with a moderate DNA loading rate, the DNA post-loading procedure resulted in a discharge capacity of 771 mA h g−1 at 0.1 C after 200 cycles (70.7% retention of the initial), which yielded slightly improved performance as compared to the DNA pre-loading procedure. The proposed DNA decorating scheme may provide an applicable technical solution for developing high-performance Li/S batteries.

Graphical abstract: High-performance lithium/sulfur batteries by decorating CMK-3/S cathodes with DNA

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Publication details

The article was received on 11 Nov 2014, accepted on 26 Jan 2015 and first published on 28 Jan 2015


Article type: Paper
DOI: 10.1039/C4TA06083K
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J. Mater. Chem. A, 2015,3, 7241-7247

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    High-performance lithium/sulfur batteries by decorating CMK-3/S cathodes with DNA

    Q. Li, C. Zhou, Z. Ji, B. Han, L. Feng and J. Wu, J. Mater. Chem. A, 2015, 3, 7241
    DOI: 10.1039/C4TA06083K

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