2D Frameworks of C2N and C3N as New Anode Materials for Lithium-Ion Batteries



Publication Details

Xu, J., Mahmood, J., Dou, Y., Dou, S., Li, F., Dai, L. & Baek, J. (2017). 2D Frameworks of C2N and C3N as New Anode Materials for Lithium-Ion Batteries. Advanced Materials, 29 (34), 1702007 -1-1702007 -8.


Novel layered 2D frameworks (C 3 N and C 2 N-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, C 3 N and C 2 N-450 exhibit unusual electrochemical characteristics. For example, C 2 N-450 (and C 3 N) 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, C 3 N 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 C 3 N) 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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