Vertical porous Ti3CNTx/rGO hybrid aerogels with enhanced capacitive performance

Xu，Shuaikai1; Yan，Surong1; Chen，Xue1; Huang，Haifu1; Liang，Xianqing1; Wang，Yuanhao3; Hu，Qing3; Wei，Guodong4; Yang，Ya1,2

2023-03-01

10.1016/j.cej.2023.141528

CHEMICAL ENGINEERING JOURNAL   Impact Factor & Quartile

1385-8947

Two-dimensional MXenes have shown great application potential in high-performance supercapacitors due to their high conductivity and excellent intercalation pseudocapacitance. Thereinto, compared with previously reported TiCT, TiCNT MXene with unique C and N atom-layer structure was predicted to achieve higher capacitive performance. However, the nanosheet restacking and complex ion-diffusion paths often limit the capacitance and rate performance of MXene-based electrodes. At this point, we proposed to construct vertical porous TiCNT/rGO hybrid aerogel electrodes through a unidirectional bottom-up freezing process. The vertical porous structure would greatly shorten the ion diffusion paths. Furthermore, the introduced rGO nanosheets would impede the restacking of TiCNT nanosheets, improving the accessibility of electrolyte ions. As a result, the TiCNT/rGO hybrid aerogels delivered significantly improved gravimetric capacitance of 390 F g, high-rate performance (205 F g at 1000 mV s) and great cycling stability (98 % capacitance retention after 10,000 cycles). This work not only proved the great superiority of vertical porous TiCNT/rGO hybrid aerogels but also opened a new door for TiCNT and other MXenes to be used for high-performance supercapacitors.

Hybrid aerogels MXenes Pseudocapacitance Supercapacitors Vertical Ti3CNTx

English

Others

ENGINEERING

2-s2.0-85146922420

Scopus

1.Guangxi Key Laboratory of Electrochemical Energy Materials,Guangxi Novel Battery Materials Research Center of Engineering Technology,Center on Nanoenergy Research,College of Physics Science and Technology,Guangxi University,Nanning,530004,China
2.CAS Center for Excellence in Nanoscience,Beijing Key Laboratory of Micro-nano Energy and Sensor,Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing,101400,China
3.SUSTech Engineering Innovation Center,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
4.Materials Institute of Atomic and Molecular Science,School of Physics and Energy,Shaanxi University of Science and Technology,Xi'an,Shaanxi,710021,China

Xu，Shuaikai,Yan，Surong,Chen，Xue,et al. Vertical porous Ti3CNTx/rGO hybrid aerogels with enhanced capacitive performance[J]. CHEMICAL ENGINEERING JOURNAL,2023,459.

Xu，Shuaikai.,Yan，Surong.,Chen，Xue.,Huang，Haifu.,Liang，Xianqing.,...&Yang，Ya.(2023).Vertical porous Ti3CNTx/rGO hybrid aerogels with enhanced capacitive performance.CHEMICAL ENGINEERING JOURNAL,459.

Xu，Shuaikai,et al."Vertical porous Ti3CNTx/rGO hybrid aerogels with enhanced capacitive performance".CHEMICAL ENGINEERING JOURNAL 459(2023).