Two-dimensional layered chromium selenophosphate: advanced high-performance anode material for lithium-ion batteries

Abstract The demands of the energy storage market for better performing lithium-ion batteries (LIBs) are enormous and ever-increasing. Following this trend, new electrode materials with higher power densities should be developed to reach requirements next-generation batteries. With in mind, we present a novel composite (CrPSe 3 -G-MWCNT@NiB) that combines diverse characteristics excellent Li properties 2D layered chromium selenophosphate ), high conductivity specific surface area carbon-based [graphite (G) multi-walled carbon nanotubes (MWCNTs)], abundant coordinative unsaturated sites Ni–B nanoflakes. composites were synthesized via process involving three stages: (a) one-step high-temperature solid-phase CrPSe preparation, (b) high-energy ball milling integration materials, (c) fast interface chemical reduction coating It is demonstrated optimized -G-MWCNT@NiB exhibit remarkable electrochemical response lithium half-cells, delivering around 657 mAh g −1 after 200 cycles, as well significantly longer cycle life, rate capability lower charge/discharge polarization comparison bulk . Galvanostatic studies also revealed -G-MWCNTs@NiB displays property, which enable its application full cells, capacity 123 cathode 40 cycles Coulombic efficiency (over 99.1%). Thus, nanoflakes into presented makes it particularly promising candidate anode use performance LIBs.