红磷/石墨复合材料的制备及电化学性能

doi:10.11944/j.issn.1000-0518.2020.09.200066

摘要/Abstract

摘要： 研究了一种先通过机械球磨和水热法制得的亚微米红磷,再通过球磨亚微米红磷与石墨得到的块状亚微米红磷/石墨复合材料(smRP/G),并利用扫描电子显微镜(SEM)、X射线衍射(XRD)、X射线光电子能谱分析(XPS)、循环伏安法(CV)等手段其进行了表征。相对比普通红磷,亚微米红磷更容易通过球磨与石墨复合,能有效提升石墨材料的储锂容量。为红磷在锂离子电池负极材料上的应用提供了一种思路。在少量添加红磷的条件下,当红磷质量分数为3%时smRP/G表现最佳(3%smRP/G)。在100 mA/g电流密度下展示出了1417 mA·h/g的首次放电容量,首次库伦效率67.4%。并在循环200圈后依然保持着700 mA·h/g的可逆循环容量。

关键词: 红磷, 石墨, 球磨, 锂离子电池

Abstract: In this paper, a kind of bulk submicron red phosphorus/graphite composite (smRP/G) was studied, which was prepared by mechanical ball milling submicron red phosphorus and graphite. Its characteristics were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), cyclic voltammogram (CV) and etc. Compared with common red new energystorage materials, new catalytic materials, submicron red phosphorus is easier to form composites with graphite by ball milling, which can effectively improve the lithium storage capacity of graphite materials. It provides an idea for the application of red phosphorus in the negative electrode materials of lithium-ion batteries. In this work, under the condition of adding a mass percent of 3% red phosphorus, smRP/G shows the best performance. At the current density of 100 mA/g, the first discharge capacity of 1417 mA穐/g is displayed, and the first coulomb efficiency is 67.4%. The reversible capacity of 700 mA穐/g is maintained after 200 cycles.

Key words: red phosphorus, graphite, ball milling, lithium-ion batteries

陶承业, 杨占旭, 李玥. 红磷/石墨复合材料的制备及电化学性能[J]. 应用化学, 2020, 37(9): 1056-1061.

TAO Chengye, YANG Zhanxu, LI Yue. Preparation and Electrochemical Properties of Red Phosphorus/Graphite Composite[J]. Chinese Journal of Applied Chemistry, 2020, 37(9): 1056-1061.

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