Ultrahigh-rate and high-density lithium-ion capacitors through hybriding nitrogen-enriched hierarchical porous carbon cathode with prelithiated nnicrocrystalline graphite anode
Ultrahigh-rate and high-density lithium-ion capacitors through hybriding nitrogen-enriched hierarchical porous carbon cathode with prelithiated nnicrocrystalline graphite anode
复制标题
富氮分级多孔碳正极与预锂化微晶石墨负极混合的超高倍率、高密度锂离子电容器
DOI：
10.1016/j.nanoen.2015.03.001
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发表时间：
2015-07-01
期刊：
影响因子：
17.6
通讯作者：
Kang, Feiyu
中科院分区：
文献类型：
--
作者：
Yu, Xiaoliang;Zhan, Changzhen;Kang, Feiyu
锂离子电容器（LIC）是集成电池和电容器功能的新型先进电化学储能（HES）系统。目前，用于开发高功率LIC的大多数努力都致力于电池型阳极的纳米结构设计，这通常导致低填充密度并且不能从根本上改善缓慢的法拉第反应。目前，多孔炭阴极的性能以及阴阳极的合理匹配对锂离子电池功率性能的影响研究较少。在此，一种新型的富氮介孔碳纳米球/石墨烯（N-GMCS）纳米复合材料，它同时显示出分级多孔结构，三维导电网络，以及非常高的质量密度。当这种N-GMCS阴极与预锂化微晶石墨（PLMG）阳极耦合时，集成器件显示出在EES系统中非常期望的相当高的堆积密度。特别是，N-GMCS//PLMG系统中的PLMG阳极打破了缓慢法拉第反应和锂离子体扩散的限制，提供了超快的电容器样电化学响应。N-GMCS/ /PLMG的最大能量密度（80 W·h·kg ~（-1），68.6W·h·L ~（-1））和最大功率密度（352 kW·kg ~（-1），292 kW·L ~（-1））分别是超级电容器的5倍和2.8倍。(C)2015爱思唯尔有限公司版权所有。
Lithium-ion capacitors (LICs) are novel advanced electrochemical energy storage (EES) systems integrating both battery and capacitor functions. Most efforts for developing high-power LICs are currently dedicated to nanostructure design of battery-type anodes, which in general results in low packing densities and cannot fundamentally improve the slow Faradaic reaction. Up to now, little attention has been focused on the effects of porous carbon cathodes and the reasonable matching of cathode/anode on the power performance of LICs. Herein, a novel nitrogen-enriched mesoporous carbon nanospheres/graphene (N-GMCS) nanocomposite is demonstrated, which shows simultaneously hierarchical porous structure, 3D conductive network, as well as very high mass density. When such N-GMCS cathode is coupled with prelithiated microcrystalline graphite (PLMG) anode, the integrated device shows quite high packing density which is highly desirable in EES systems. In particular, the PLMG anode in N-GMCS//PLMG system breaks the limitation of slow Faradaic reaction and lithium-ion bulk diffusion, providing an ultrafast capacitor-like electrochemical response. Quite attractive maximum energy density (80W h kg(-1), 68.6W h L-1) and state-of-the-art maximum power density (352 kW kg 1, 292 kW L-1) can be achieved in N-GMCS/ /PLMG, which are 5 and 2.8 times as large as those of the supercapacitor counterpart, respectively. (C) 2015 Elsevier Ltd. All rights reserved.