A N-doped carbon with encapsulated Fe and Co particles derived from a metal organic framework for use as the anode in lithium-ion batteries

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials Pub Date : 2025-04-01 DOI:10.1016/S1872-5805(25)60959-0

Ren-tian CHEN , Yu-xin ZHU , Rui LUO , Xiao-nuo JIANG , Hong-xiang SI , Xiang-yun QIU , Qian WANG , Tao WEI

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引用次数: 0

Abstract

Metal-organic frameworks (MOFs) are important as possible energy storage materials. Nitrogen-doped iron-cobalt MOFs were synthesized by a one-pot solvothermal method using CoCl₃·6H₂O and FeCl₃·6H₂O dissolved in N, N-dimethylformamide, and were converted into Fe-Co embedded in N-doped porous carbon polyhedra by pyrolysis in a nitrogen atmosphere. During pyrolysis, the organic ligands transformed into N-doped porous carbon which improved their structural stability and also their electrical contact with other materials. The Fe and Co are tightly bound together because of their encapsulation by the carbon nitride and are well dispersed in the carbon matrix, and improve the material's conductivity and stability and provide additional capacity. When used as the anode for lithium-ion batteries, the material gives an initial capacity of up to 2230.7 mAh g⁻¹ and a reversible capacity of 1146.3 mAh g⁻¹ is retained after 500 cycles at a current density of 0.5 A g⁻¹, making it an excellent candidate for this purpose.

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一种从金属有机骨架中提取的含有铁和钴颗粒的氮掺杂碳，用作锂离子电池的阳极

金属有机骨架（MOFs）是一种重要的储能材料。以CoCl3·6H2O和FeCl3·6H2O溶解于N， N-二甲基甲酰胺中，采用一锅溶剂热法合成了氮掺杂铁钴MOFs，并在氮气气氛中热解转化为Fe-Co包埋在N掺杂多孔碳多面体中。在热解过程中，有机配体转变为掺n的多孔碳，提高了其结构稳定性和与其他材料的电接触性。由于被氮化碳包裹，铁和钴紧密结合在一起，并很好地分散在碳基体中，从而提高了材料的导电性和稳定性，并提供了额外的容量。当用作锂离子电池的阳极时，该材料的初始容量高达2230.7 mAh g - 1，在0.5 a g - 1的电流密度下，500次循环后仍保持1146.3 mAh g - 1的可逆容量，使其成为这一目的的优秀候选人。下载：下载高分辨率图片（121KB）下载：下载全尺寸图片

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来源期刊

New Carbon Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.10

自引率

8.80%

发文量

3245

审稿时长

5.5 months

期刊介绍： New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.