Facile one-step synthesis of Cu2O@Cu sub-microspheres composites as anode materials for lithium ion batteries

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2018,（7）
• 页码范围: 1085-1090
• 页数: 6页
• 语种: 英文

摘要

Cu2O@Cu sub-microspheres composites with a narrow particle size distribution from 300 to S00 nm was successfully fabricated by one-step synthesis through the direct thermal decomposition of copper nitrate (Cu(NO3)2) in octadecylamine (ODA) solvent.As anode materials for lithium ion batteries,the Cu2O@Cu composites obviously possess high specific capacity,excellent cyclic stability and rate capability.The coulombic efficiency is about 84％ in the 1 st cycle and increases significantly up to 97.8％ during successive cycles at various current densities.Even under a high current density of 500 mA g-1,the discharge capacity of Cu2O@Cu composites remains up to 200 mAh g-1.The excellent electrochemical properties are ascribed to the synergistic effect between high electronic conductivity and volume-buffering capacity of metallic copper composited with Cu2O.