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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (11): 1166-1170. 上一篇    下一篇

研究论文

石墨型C3N4的固态合成及嵌锂性能研究

杨晓晖a王红军a 陆希峰b 崔得良b 张树永*,a

  

  1. a山东大学化学与化工学院 教育部胶体与界面化学重点实验室 济南 250100)
    b山东大学晶体材料国家重点实验室 济南 250100

  • 投稿日期:2008-10-09 修回日期:2008-12-20 发布日期:2009-06-14
  • 通讯作者: 张树永

Solid-state Synthesis of Graphite-like C3N4 and Its Reversible Li＋ Intercalation

Yang, Xiaohui a Wang, Hongjun a Lu, Xifeng b Cui, Deliang b Zhang, Shuyong *,a   

  1. a Education Ministry Key Laboratory of Colloid and Interface Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100)
    b State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100
  • Received:2008-10-09 Revised:2008-12-20 Published:2009-06-14
  • Contact: Zhang, Shuyong

PDF

2858

被引次数

6

采用固态反应方法制备了石墨型C3N4. 采用XRD, FTIR, XPS对产物的组成和结构进行了表征. 研究了石墨型C3N4的电化学行为, 并将其用作负极材料组装成锂离子电池进行测试, 发现该材料具有一定的嵌锂能力, 但比容量低, 循环寿命短. 采用少量嵌入Mg2＋, Al3＋的方法对石墨型C3N4进行改性, 结果发现石墨型C3N4的充放电性能得到一定改善.

关键词: 石墨型C3N4, 固态合成, 电化学性质, 锂离子电池, 可逆嵌锂

Graphite-like carbon nitride (g-C3N4) was synthesized using a solid state method and characterized by XRD, FTIR and XPS. The electrochemical properties of the g-C3N4 were studied using both cyclic voltammetry and charge-discharge cycling. It was found that the g-C3N4 sample showed certain reversible intercalation capacity of Li＋, but the capacity dropped sharply during the first few cycles. The poor reversibility could be ascribed mainly to the decomposition of C3N4 upon electroreduction. Modification of the g-C3N4 was performed by intercalating a little amount of Mg2＋ and Al3＋ into its interlayer spacing, which made slight improvement on the crystallization and the reversible Li＋ intercalation of the residual g-C3N4.

Key words: graphite-like C3N4, solid-state synthesis, electrochemical property, lithium-ion battery, reversible lithium intercalation