Nitrogen-doped carbon paper with 3D porous structure as a flexible free-standing anode for lithium-ion batteries.
Nitrogen-doped carbon paper with 3D porous structure as a flexible free-standing anode for lithium-ion batteries.
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DOI：
10.1038/s41598-017-07345-y
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发表时间：
2017-08-10
影响因子：
4.6
通讯作者：
Yao H
中科院分区：
文献类型：
--
作者：
Zhang H;Yang J;Hou H;Chen S;Yao H
在本文中，一种新的氮掺杂碳纸（NCP）具有高度致密的三维蜂窝结构和良好的弯曲柔性在压缩下热解三聚氰胺泡沫（NCP）。当用作锂离子电池的独立阳极时，NCP电极在0.5 A g−1（1.34 C）下循环200次后可提供高达329.8 mA h g−1的可逆容量，在8.0 A g−1（21.5 C）下循环500次后可提供高达126.5 mA h g −1的可逆容量。这种电化学性能远高于通过热解而不压缩制备的对应物的电化学性能，并且可以主要归因于（a）具有许多结的三维高度致密互连碳网络，其可以促进有效的电子转移并为锂离子提供短的传输路径;和（B）优异的机械柔性和自立能力，其免除了粘合剂、导电添加剂和集电器的使用。NCP电极在高性能锂离子电池柔性和可穿戴电子产品中具有很好的应用前景。
In this paper, a novel nitrogen-doped carbon paper (NCP) with both highly dense three-dimensional cellular structure and excellent bending flexibility is fabricated by pyrolyzing a melamine foam under compression. When serving as a free-standing anode for lithium-ion batteries, the NCP electrode delivers a reversible capacity up to 329.8 mA h g−1 after 200 cycles at 0.5 A g−1 (1.34 C) and 126.5 mA h g−1 after 500 cycles at 8.0 A g−1 (21.5 C). Such electrochemical performance is much higher than those of the counterparts prepared by pyrolysis without compression and can be mainly attributed to (a) the 3D highly dense interconnected carbon network with numerous junctions which can facilitate the efficient electron transfer and provide short transportation paths for lithium ions; and (b) the excellent mechanical flexibility and self-standing capability which exempt the use of binder, conductive additive and current collector. The NCP electrode implies a great promise of application in the high-performance Li-ion batteries for the flexible and wearable electronics.
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