A low-cost and one-step synthesis of N-doped monolithic quasi-graphene films with porous carbon frameworks for Li-ion batteries
A low-cost and one-step synthesis of N-doped monolithic quasi-graphene films with porous carbon frameworks for Li-ion batteries
复制标题
DOI：
10.1016/j.nanoen.2015.07.029
复制
发表时间：
2015-10-01
期刊：
影响因子：
17.6
通讯作者：
Shen, Ze Xiang
中科院分区：
文献类型：
--
作者：
Liu, Xiaoxu;Chao, Dongliang;Shen, Ze Xiang
我们报告了通过商业过滤膜的一步热解制备具有多孔碳框架（GPF）的整体准石墨烯膜，两者都是氮掺杂的，并证明其在锂离子存储中的性能比商业石墨有所改善。这种新电极的几个有利特征（多孔框架及其与准石墨烯的完整性，N掺杂）通过其高速率和长循环可充电锂离子存储来体现。在0.1 ℃的倍率下，获得了493 mA h g（-1）的高可逆容量。在30摄氏度的快速充电/放电速率下，GPF电极提供220 mA h g（-1）的容量，可持续长达5000次循环，几乎没有容量衰减。我们还证明了GPF作为一种新型的活性材料集流体，具有改善的质量负载和倍率性能。该制造具有成本效益、高效和可扩展性，因此可以为用于高性能能量存储的新型碳质材料铺平道路。(C)2015爱思唯尔有限公司版权所有。
We report the fabrication of monolithic quasi-graphene film with porous carbon frameworks (GPF), both nitrogen-doped, by a one-step pyrolysis of commercial filter membrane, and demonstrate its improved performance in Li-ion storage compared to commercial graphite. Several advantageous features (porous framework and its integrity with the quasi-graphene, N doping) of this new electrode are manifested by its high-rate and long-cycling rechargeable Li-ion storage. A high reversible capacity of 493 mA h g(-1) is achieved at a rate of 0.1 degrees C. And at a fast charge/discharge rate of 30 degrees C, the GPF electrode delivers a capacity of 220 mA h g(-1), which can last for up to 5000 cycles with nearly no capacity fading. We also demonstrate the GPF as a new type of current collector for active materials with improved mass loading and rate performance. The fabrication is cost effective, highly efficient, and scalable, and thus may pave way to new carbonaceous materials for high-performance energy storage. (C) 2015 Elsevier Ltd. All rights reserved.