Facile one-step synthesis of Cu_2O@Cu sub-microspheres composites as anode materials for lithium ion batteries  

作　　者：Huijie Zhou Hongbin Zhao Xuan Zhang Hongwei Cheng Xionggang Lu Qian Xu 

机构地区：[1]State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering, Shanghai University [2]College of Sciences, Shanghai University

出　　处：《Journal of Materials Science & Technology》2018年第7期1085-1090,共6页材料科学技术（英文版）

基　　金：financially supported by the National Program on Key Basic Research Project (2014CB643403);National Key Research and Development Program of China (2017YFB0102900);the Shanghai Pujiang Program (17PJD016)

摘　　要：Cu2O@Cu sub-microspheres composites with a narrow particle size distribution from 300 to 500 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^-l, 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.2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science ＆ Technology.Cu2O@Cu sub-microspheres composites with a narrow particle size distribution from 300 to 500 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^-l, 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.2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science ＆ Technology.

关 键 词：Cu2O@Cu composites Anode materials OCTADECYLAMINE One-step synthesis 

分 类 号：TM912[电气工程—电力电子与电力传动] TM911.4