School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, People's Republic of China 510006. School of Chemical and Biomedical Engineering, Nanyang Technological University, Block N1.2, 01-06, 62 Nanyang Drive, Singapore 637459.
Nanotechnology. 2017 Apr 7;28(14):145403. doi: 10.1088/1361-6528/aa5b62. Epub 2017 Jan 31.
Uniform carbon wrapped copper telluride nanowires were successfully prepared by using an in situ conversion reaction. The length of these nanowires is up to several micrometers and the width is around 30-40 nm. The unique one dimensional structure and the presence of conformal carbon coating of copper telluride greatly accommodate the large volumetric changes during cycling, significantly increase the electrical conductivity and reduce charge transfer resistance. The copper telluride nanowires show promising performance in a lithium ion battery with a discharge capacity of 130.2 mA h g at a high current density of 6.0 A g (26.74 C) and a stable cycling performance of 673.3 mA h g during the 60th cycle at 100 mA g. When evaluated as anode material for a sodium ion battery, the copper telluride nanowires deliver a reversible capacity of 68.1 mA h g at 1.0 A g (∼4.46 C) and have a high capacity retention of 177.5 mA h g during the 500th cycle at 100 mA g.
通过原位转化反应成功制备了均匀的碳包裹铜碲纳米线。这些纳米线的长度可达数微米，宽度约为 30-40nm。独特的一维结构和铜碲的碳包覆的存在，极大地适应了循环过程中的大体积变化，显著提高了电导率并降低了电荷转移电阻。铜碲纳米线在锂离子电池中表现出良好的性能，在 6.0 A g（26.74 C）的高电流密度下具有 130.2 mA h g 的放电容量，在 100 mA g 下第 60 次循环时具有稳定的循环性能 673.3 mA h g。当用作钠离子电池的阳极材料时，铜碲纳米线在 1.0 A g（∼4.46 C）下具有 68.1 mA h g 的可逆容量，在 100 mA g 下 500 次循环后具有 177.5 mA h g 的高容量保持率。
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