...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of nanoparticle research: An interdisciplinary forum for nanoscale science and technology >Synthesis of carbon-coated Co_3O_4 composite with dendrite-like morphology and its electrochemical performance for lithium-ion batteries
【24h】

Synthesis of carbon-coated Co_3O_4 composite with dendrite-like morphology and its electrochemical performance for lithium-ion batteries

机译：类锂枝状碳包覆Co_3O_4复合材料的合成及其对锂离子电池的电化学性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Carbon-coated Co_3O_4 microparticles (Co _3O_4@C) with dendrite-like morphology are prepared by a low-temperature hydrothermal method and subsequent C2H2 chemical vapor deposition (CVD) for the first time. The synthesized precursor Co_3O_4 has a size of 8-10 μm, which is assembled by lots of aligned Co_3O_4 wire with 4-5 μm in length. After carbon coating, Co_3O_4 microparticles were proved to be coated in amorphous carbon of ~10 nm. A plausible formation process of the dendrite-like Co_3O_4 and Co_3O_4@C is proposed based on the morphology and structure characterizations of the materials. As an anode material for lithium-ion batteries, the Co _3O_4@C composite electrode exhibits higher reversible capacity and better cycling performance than the unmodified Co_3O _4 electrode. The reversible capacity of the Co_3O _4@C composite after 40 cycles is 500 mAh g-1, much higher than that of Co_3O_4 (148 mAh g-1). Electrochemical impedance spectra and cyclic voltammogram indicate that the carbon layer coated on Co_3O_4 by CVD can improve the electrochemical activity and enhance the reversibility of Co_3O _4 during charge/discharge cycles.
机译：通过低温水热法制备碳涂层的Co_3O_4微粒（Co _3O_4 @ C），并随后进行首次C2H2化学气相沉积（CVD）。合成的前驱体Co_3O_4的尺寸为8-10μm，其由许多长度为4-5μm的对准的Co_3O_4线组装而成。碳涂层后，证明Co_3O_4微粒被〜10 nm的无定形碳涂层。基于材料的形貌和结构表征，提出了类树枝状Co_3O_4和Co_3O_4 @ C的合理形成过程。作为锂离子电池的负极材料，Co _3O_4 @ C复合电极比未修饰的Co_3O _4电极具有更高的可逆容量和更好的循环性能。 Co_3O _4 @ C复合材料在40个循环后的可逆容量为500 mAh g-1，远高于Co_3O_4的可逆容量（148 mAh g-1）。电化学阻抗谱和循环伏安图表明，通过CVD在Co_3O_4上涂覆的碳层可以改善电化学活性并增强Co_3O _4在充电/放电循环中的可逆性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号