2D frameworks of C2N and C3N as new anode materials for lithium-ion batteries

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Author(s)
Xu, Jiantie
Mahmood, Javeed
Dou, Yuhai
Dou, Shixue
Li, Feng
Dai, Liming
Baek, Jong-Beom
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2017
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Abstract

Novel layered 2D frameworks (C3N and C2N-450) with well-defined crystal structures are explored for use as anode materials in lithium-ion batteries (LIBs) for the first time. As anode materials for LIBs, C3N and C2N-450 exhibit unusual electrochemical characteristics. For example, C2N-450 (and C3N) display high reversible capacities of 933.2 (383.3) and 40.1 (179.5) mAh g−1 at 0.1 and 10 C, respectively. Furthermore, C3N shows a low hypothetical voltage (≈0.15 V), efficient operating voltage window with ≈85% of full discharge capacity secured at >0.45 V, and excellent cycling stability for more than 500 cycles. The excellent electrochemical performance (especially of C3N) can be attributed to their inherent 2D polyaniline frameworks, which provide large net positive charge densities, excellent structural stability, and enhanced electronic/ionic conductivity. Stable solid state interface films also form on the surfaces of the 2D materials during the charge/discharge process. These 2D materials with promising electrochemical performance should provide insights to guide the design and development of their analogues for future energy applications.

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Advanced Materials

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29

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34

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© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: 2D frameworks of C2N and C3N as new anode materials for lithium-ion batteries, Advanced Materials, 2017, 29 (34), pp. 1702007, which has been published in final form at https://doi.org/10.1002/adma.201702007. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

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Physical sciences

Chemical sciences

Engineering

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Chemistry, Multidisciplinary

Chemistry, Physical

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Xu, J; Mahmood, J; Dou, Y; Dou, S; Li, F; Dai, L; Baek, J-B, 2D frameworks of C2N and C3N as new anode materials for lithium-ion batteries, Advanced Materials, 2017, 29 (34), pp. 1702007

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