Cu2P7-black P-MWCNTs (CuP5/MWCNTs): An advanced hybrid anode for Li/Na-ion batteries

Cu2P7-black P-MWCNT (CuP5/MWCNT) is prepared by a facile mechanical milling method. When used as anodes for Li/Na-ion batteries, the composite delivers high comprehensive performances: initial Coulombic efficiency up to 90/84%, 1455/1170 mA h g (1) after 200 cycles, and 960/580 mA h g (1) at 5 A g (1) for Li/Na-ion batteries, respectively. The performances can be attributed to the hybridized strategy of two-dimension layered structure of Cu2P7, black P, and one-dimension multiwall carbon nanotubes. The former offers a fast transport channel for Li/Na-ions and the latter provides for fast transport of electrons and accommodates the volume variation during cycling. In addition, the synergistic effect among different phases also leads to enhanced performance. The integrated strategy of one-dimensional and two-dimensional advantages can excite more research interest in the energy-storage field. (C) 2019 Elsevier B.V. All rights reserved.