期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 40, 页码 44777-44788出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c13059
关键词
MXene; N-doped carbon foam; 3D hollow neuron-like architecture; compressible electrodes; all solid-state supercapacitors
资金
- Natural Science Foundation of Guangdong Province of China [2015A030313591]
- Chinese Universities Scientific Fund
Currently, the MXene-based flexible supercapacitors have caused much attention due to their excellent mechanical performance and novel electrical property. However, the aggregation and rearrangement of MXene nanosheets in the process of electrode preparation limit their electrochemical performance. Herein, a kind of novel MXene/N-doped carbon foam (MXene/NCF) compressible composite with three-dimensional (3D) hollow interconnected neuron-like architecture is directly prepared by one-step pyrolysis and used for the freestanding, highly compressible supercapacitors. The synergistic effect exists in the MXene/NCF composite when applied to supercapacitors: NCF can provide the additional pseudocapacitance by N atom doping and simultaneously supports the MXene nanosheets to construct the 3D hollow interconnected neuron-like architecture for supplying highly stable, efficient channels for ion diffusion/electron transport and more contact sites, and that the MXene enhances conductivity and hydrophilicity. Therefore, the freestanding MXene/NCF electrode shows a remarkable gravimetric capacitance of 332 F g(-1) and volumetric capacitance of 3162 mF cm(-3), superior rate performance of 64% (from 0.5 to 100 A CI), and 99.2% capacity retention after 10,000 cycles. Significantly, the MXene/NCF-based all solid-state supercapacitors still show a high specific capacitance and a large rate performance. In addition, the device can be compressed arbitrarily under 60% strain with almost no change in morphology and electrochemical property. These excellent properties expect that the MXene/NCF composite has broad applications in the field of flexible supercapacitors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据