Ti3C2 MXenes-derived NaTi2(PO4)3/MXene nanohybrid for fast and efficient hybrid capacitive deionization performance

By Zeqiu Chen, Xingtao Xu, Zibiao Ding, Kai Wang, Xun Sun, Ting Lu, Muxina Konarova, M. Eguchi, J. Shapter, Lijia Pan and 1 more. 2020

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Abstract The exploration and design of high-performance sodium-ion insertion host materials is of great significance to the development of hybrid capacitive deionization (HCDI). NaTi2(PO4)3, abbreviated as NTP, is famous for its high theoretical sodium-ion storage performance, but due to the poor electrical conductivity, its desalination capacity has been largely limited. Herein we report the design and synthesis of NTP/MXene (NTP/M) nanohybrid by the transformation of Ti3C2 MXene under solvothermal conditions. Due to its improved electrical conductivity and enhanced sodium-insertion ability with the introduction of MXene, the NTP/M nanohybrid shows an extraordinary desalination performance including a maximum deionization rate of 29.6 mg g−1 min−1, an ultrahigh desalination capacity of 128.6 mg g−1 and a stable cycling desalination ability, suggesting the promising application for practical HCDI.

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