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电化学(中英文) ›› 2025, Vol. 31 ›› Issue (5): 2501081.  doi: 10.61558/2993-074X.3534

• 论文 • 上一篇    下一篇

三维三聚氰胺碳海绵/碘化钠复合材料作为钠离子电池正极材料的研究

黄倩莹a,#, 刘悦a,#, 林子鑫a, 郑淑怡a, 梅婷婷a, 唐宇婷a, 张颖鹤b,c,*(), 刘军a,*()   

  1. a广东工业大学材料与能源学院,广东 广州 510006,中华人民共和国
    b哈尔滨工业大学(深圳)理学院,广东 深圳 518055,中华人民共和国
    c深圳市先进功能碳基材料研究与综合应用重点实验室
  • 收稿日期:2025-01-08 修回日期:2025-01-23 接受日期:2025-03-05 发布日期:2025-03-23 出版日期:2025-05-28

Three-Dimensional Melamine Carbon Sponge/NaI as Cathode Materials for Sodium-ion Batteries

Qian-Ying Huanga,#, Yue Liua,#, Zi-Xin Lina, Shu-Yi Zhenga, Ting-Ting Meia, Yu-Ting Tanga, Ying-He Zhangb,c,*(), Jun Liua,*()   

  1. aSchool of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, Guangdong, PR China
    bSchool of Science, Harbin Institute of Technology (Shenzhen), University Town, Shenzhen 518055, Guangdong, PR China
    cShenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application, Shenzhen 518055, Guangdong, PR China
  • Received:2025-01-08 Revised:2025-01-23 Accepted:2025-03-05 Online:2025-03-23 Published:2025-05-28
  • Contact: *Ying-He Zhang, E-mail: yinghe.zhang@googlemail.com (Y. zhang); Jun Liu, E-mail: junliu23@gdut.edu.cn (J. Liu)
  • About author:#Qian-Ying Huang and Yue Liu contributed equally.

摘要:

钠碘(Na-I)电池作为一种潜在的可替代锂离子电池的储能装置,展现出良好的发展前景。然而,其实际应用受到导电性差、热稳定性不足以及多碘化物溶解与穿梭效应的限制。在本研究中,我们报道了一种通过碳化商用三聚氰胺海绵制备碳海绵(MC)的新方法。所制备的MC具有独特的自生长碳纳米管结构,能够为多碘化物提供物理和化学吸附,从而有效改善Na-I2电池的电化学性能。实验结果表明,NaI/MC电极大幅降低了电化学阻抗,并减少了多碘化物的溶解效应。NaI/MC正极在200次循环测试中平均放电容量为92.75 mAh·g-1,同时库仑效率稳定维持在94%。本研究成果展示了在储能钠离子电池领域潜在的应用前景。

关键词: 钠碘电池, 碘化钠, 三聚氰胺碳海绵

Abstract:

The sodium-iodine (Na-I) battery exhibits significant potential as an alternative energy storage device to the lithium-ion battery. However, its development is hindered by inadequate electrical and thermal stability, as well as the dissolution and shuttling of polyiodide. In this study, we report a preparation method for melamine carbon sponge (MC) via carbonizing a commercially available kitchen sponge. It was revealed that the as-prepared MC, composed of unique self-growing carbon nanotubes, could provide both physical and chemical adsorption capabilities for intermediate polyiodides to improve the electrochemical performance of NaI. Consequently, the NaI/MC electrode effectively minimized polyiodide dissolution and reduced the electrochemical impedance. The NaI/MC cathode demonstrated a high average discharge capacity of 92.75 mAh·g-1 over 200 cycles while maintaining a coulombic efficiency of 94%. The research findings from our study have promising applications in Na-I batteries.

Key words: sodium-iodine battery, sodium iodide, melamine carbon sponge