Journal
ADVANCED MATERIALS INTERFACES
Volume 7, Issue 19, Pages -Publisher
WILEY
DOI: 10.1002/admi.202000831
Keywords
assembly; energy storage; MXene; NiAl-LDHs; pseudocapacitors
Funding
- Natural Science Foundation of Shaanxi Province of China [2018JM5141]
- National Nature Science Foundation of China [21975196]
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Multifarious layered electrode materials are attracting increased attention in the field of energy storage because of their high specific surface and interlayer modifiability. However, the natural tendency to be re-superimposed and the inherent disadvantages of a single layered electrode significantly affect electronic transport and ion migration. Considering the poor electrochemical performance and low structural stability, a novel MXene@PDDA/NiAl-LDHs hybrids as supercapacitor electrode via an electrostatic-assembled approach is elaborately designed. The alternate MXene and PDDA/NiAl-LDHs layers with 3D interconnected networks architectures could ensure intimate contact to efficiently take advantage of high electron conductivity of MXene and high pseudocapacitance activity of PDDA/NiAl-LDHs, thus effectively accelerating the ionic/electronic transport rates and improving the electrochemical storage of hybrid electrodes. As a consequence, as an electrode for supercapacitor, the MXene@PDDA/NiAl-LDHs exhibits a high specific capacitance of 1825.8 F g(-1)at a current density of 1.0 A g(-1), a remarkable synergetic effect, leading to a high rate capability after 100 cycles at different current densities and long cycling stability with only 0.9% degradation after 5000 cycles at 5.0 A g(-1). This work provides a strategy for 2D layered materials to design electrodes with excellent electrochemical performance in the field of energy storage.
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