将Cu2S超细纳米粒子均匀植入碳纳米线以实现高效 钾离子电池负极

Owing to their high capacities and abundant resources, transition metal sulfides (TMSs) have been proven attractive anode materials for potassium-ion (K-ion) batteries. Nevertheless, TMSs are usually limited by poor electrical conductivity large volume expansion, leading structural instability inferior battery cyclability. Herein, we significantly alleviated the nanoparticle aggregation pernicious degradation embedding ultrasmall Cu2S nanoparticles in carbon nanowires (Cu2S@C NWs). The change every NW was effectively accommodated compared with conventional particles, dramatically improving morphological integrity a noticeable enhancement cycle life. As expected, Cu2S@C can deliver reversible capacity of 391.1 mA h g−1, an excellent rate capability 118.1 g−1 at 5 A high-capacity retention 77.2% after 500 cycles 2 g−1. In addition, when assembled KVPO4F/carbon nanotubes (CNTs) cathode form K-ion full cell, it showed good discharge 110.8 100 50 This agglomeration-retardant strategy broadens horizons nanoengineering release stress induced potassium (de)intercalation facilitate further development efficient anodes