石油化工高等学校学报 ›› 2024, Vol. 37 ›› Issue (4): 76-82.DOI: 10.12422/j.issn.1006-396X.2024.04.010

• 替代燃料及新材料 • 上一篇    

焦磷酸锡负极材料的制备及性能研究

马文钊(), 王利娟()   

  1. 辽宁石油化工大学 石油化工学院,辽宁 抚顺 113001
  • 收稿日期:2024-03-22 修回日期:2024-05-10 出版日期:2024-08-25 发布日期:2024-08-07
  • 通讯作者: 王利娟
  • 作者简介:马文钊(2000⁃),男,硕士研究生,从事锂离子电池负极材料方面的研究;E⁃mail:mawz0724@163.com
  • 基金资助:
    辽宁省“兴辽英才计划”项目(XLYC1907025);辽宁省教育厅面上项目(LJKZ0408);辽宁石油化工大学第五次人才基金项目(2018XJJ?012)

Preparation and Properties of Tin Pyrophosphate Anodes

Wenzhao MA(), Lijuan WANG()   

  1. School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China
  • Received:2024-03-22 Revised:2024-05-10 Published:2024-08-25 Online:2024-08-07
  • Contact: Lijuan WANG

摘要:

焦磷酸锡作为一类新兴材料,因具有较高的比容量和适宜的嵌锂电位而备受关注。采用环境友好的合成方法,以植酸为磷源和碳源、聚环氧乙烷(PEO)为额外碳源,成功制备了锚定在碳框架上的碳包覆SnP2O7颗粒(SPO/C@C)负极材料。结果表明,额外的碳包覆层可有效抑制材料的体积膨胀,降低电荷转移电阻,从而提高电子电导率和电容贡献率;当PEO的添加量为1.36 g时,所制备样品颗粒分散均匀,具有良好的电化学性能;当电流密度为0.5 A/g时,循环充放电250次后,比容量保持在351.3 mA·h/g;在扫描速率为2.0 mV/s时,电容贡献率达到60.8%。

关键词: 焦磷酸锡, 碳包覆, 植酸, 锂离子电池, 负极材料

Abstract:

As a new class of materials, tin pyrophosphate stands out due to its high specific capacity and suitable lithium insertion potential. Carbon?coated SnP2O7 particles anchored on a carbon framework (SPO/C@C) have been synthesised by an environmentally friendly approach using phytic acid as a phosphorus and carbon source, with polyethylene oxide (PEO) as an additional carbon source. Experimental results show that the addition of extra carbon layer effectively mitigates the volume expansion of the material and reduces the charge transfer resistance, thereby improving the electronic conductivity and the capacitance contribution ratio. That the SPO/C@C sample with 1.36 g of PEO exhibits excellent dispersion and electrochemical performance. At a current density of 0.5 A/g, the discharge specific capacity is 351.3 mA·h/g after 250 cycles, and at a scan rate of 2.0 mV/s, the capacitance contribution ratio is 60.8%.

Key words: Tin pyrophosphate, Carbon coating, Phytic acid, Lithium?ion batteries, Anode material

中图分类号: 

引用本文

马文钊, 王利娟. 焦磷酸锡负极材料的制备及性能研究[J]. 石油化工高等学校学报, 2024, 37(4): 76-82.

Wenzhao MA, Lijuan WANG. Preparation and Properties of Tin Pyrophosphate Anodes[J]. Journal of Petrochemical Universities, 2024, 37(4): 76-82.

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