全文下载: 202401012.pdf
文章编号: 1672-6987(2024)01-0085-09; DOI: 10.16351/j.1672-6987.2024.01.012
马政伟, 陈甜甜, 朱开兴*(青岛科技大学 机电工程学院,山东 青岛 266061)
摘要: 利用尿素和ZIF-67为原料,通过分步碳化得到了氮氧掺杂多孔碳(N-O-ZIF),相比于未掺杂制备的多孔碳(ZIF)相比,N-O-ZIF含有更多的氮元素,可以为锚定多硫化物提供更多的活性位点,更好地抑制穿梭效应,提高硫的利用率。以N-O-ZIF为硫宿主材料的锂硫电池表现出了优异的电化学性能: S@N-O-ZIF复合正极在2 A·s-1电流密度下的初始放电比容量高达7800 mAh·g-1,循环500圈后,容量保持率为7865%,圈均容量衰减率为0043%。
关键词: ZIF-67; 尿素; 掺杂; 锂硫电池
中图分类号: TQ 207+.2文献标志码: A
引用格式: 马政伟, 陈甜甜, 朱开兴. 异质原子掺杂金属有机框架衍生多孔碳宿主材料在锂硫电池中的应用[J]. 青岛科技大学学报(自然科学版), 2024, 45(1): 85-93.
MA Zhengwei, CHEN Tiantian, ZHU Kaixing. Application of porous carbon host materials derived from heterogeneous atom doped metal-organic framework in lithium-sulfur batteries[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2024, 45(1): 85-93.
Application of Porous Carbon Host Materials Derived from Heterogeneous
Atom Doped Metal-Organic Framework in Lithium-Sulfur Batteries
MA Zhengwei, CHEN Tiantian, ZHU Kaixing
(College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China)
Abstract: In this paper, N, O atoms were co-doped in ZIF-67 to form a porous carbon material N-O-ZIF using urea and ZIF-67 as the dopant and raw materials, respectively. Compared with ZIF that was derived from sole ZIF-67, N-O-ZIF contains more nitrogen elements to form abundant active sites for polysulfide adsorption, which can effectively inhibit the shuttle effect and improve the utilization rate of sulfur. Lithium-sulfur batteries containing N-O-ZIF as the sulfur host material show excellent electrochemical performance which delivered the high initial discharge capacity of 7800 mAh·g-1 at 2 A·s-1 and an ultralow capacity decay rate of 0043% in 500 cycles.
Key words: ZIF-67; urea; doping; lithium sulfur batteries
收稿日期: 2023-01-20
基金项目: 国家自然科学基金项目(51972186).
作者简介: 马政伟(1997-),男,硕士研究生.*通信联系人.