Room-Temperature Synthesis of NiCo-Layered Double Hydroxide/MXene Composites for High-Performance Supercapacitors

The facile preparation of layered double hydroxides (LDHs)/MXene composite at room temperature is still challenging. Herein, we designed and developed a fast and room-temperature synthesis method to fabricate NiCo-LDH/Ti3C2Tx composites with sandwichlike layered structures via direct NaBH4 reduction. DFT calculations show that such layered composites can reduce the hydrogen desorption energy and increase the electrical conductivity, which is advantageous to improving electrochemical performance of supercapacitors. These superior features result in the prominent electrochemical performance of the fabricated NiCo-LDH/5-Ti3C2Tx composite electrode, including high specific capacitance (721.5 C/g at 1 A/g), outstanding rate capacity (about 85.2% from 1 to 10 A/g), and excellent stability (80.4% of capacitance retention after 5000 cycles at 5 A/g). This study provides a MXene composites with exceptional electrochemical performance, which is expected to be facile way to construct layered LDHs/suitable for various applications.

Automated summary

This study presents a facile synthesis method for preparing LDHs/MXene composites at room temperature, which exhibit exceptional electrochemical performance including high specific capacitance, outstanding rate capacity, and excellent stability. The findings provide a facile way to construct layered LDHs for various applications.