Facile one-step synthesis of Cu2O@Cu sub-microspheres composites as anode materials for lithium ion batteries
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第7期
论文作者：Huijie Zhou Hongbin Zhao Xuan Zhang Hongwei Cheng Xionggang Lu Qian Xu
文章页码：1085 - 1090
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 Cu2 O@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 m A g-1, the discharge capacity of Cu2 O@Cu composites remains up to 200 m Ah 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 Cu2 O.
Huijie Zhou1，Hongbin Zhao2，Xuan Zhang2，Hongwei Cheng1，Xionggang Lu1，Qian Xu1
1. State Key Laboratory of Advanced Special Steel & School of Materials Science and Engineering, Shanghai University2. College of Sciences, Shanghai University
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 Cu2 O@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 m A g-1, the discharge capacity of Cu2 O@Cu composites remains up to 200 m Ah 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 Cu2 O.
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