Preparation of CuO@PPy hybrid nanomaterials as high cyclic stability anode of lithium‐ion battery

Abstract

Over the recent 20 years, numerous researches have focused on the lithium‐ion batteries anodes of MOx 3d‐metal oxides which have a high specific capacity. For example, the specific capacity of CuO material as an anode is ∼670 mAh g−1. Unfortunately, serious capacity degradation limits their promising applicability. To improve cyclic stability, PPy is covered on CuO surface to prepare CuO@PPy core–shell hybrid materials by chemical polymerisation. Pyrrole amount plays an important role on control the PPy shell thickness. After PPy coating, the lithium‐ion battery cycling stability and coulombic efficiency have been improved greatly, and CP‐5 sample has the best cyclic stability and coulombic efficiency. The capacity retention of bare CuO is only 27.9% after 200 cycles. By contrast, the capacity retention of CP‐5 sample is ∼100%. The flexible conducting polymers shell (PPy) lead to improved cyclic stability. These results give a strategy to solve MOx 3d‐metal oxide capacity degradation as Lithium‐ion batteries anode.