MOF-derived porous graphitic carbon with optimized plateau capacity and rate capability for high performance lithium-ion capacitors

IF 5.6 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Minerals, Metallurgy, and Materials Pub Date : 2024-01-25 DOI:10.1007/s12613-023-2726-2

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Abstract

The development of anode materials with high rate capability and long charge–discharge plateau is the key to improve performance of lithium-ion capacitors (LICs). Herein, the porous graphitic carbon (PGC-1300) derived from a new triply interpenetrated cobalt metal-organic framework (Co-MOF) was prepared through the facile and robust carbonization at 1300°C and washing by HCl solution. The as-prepared PGC-1300 featured an optimized graphitization degree and porous framework, which not only contributes to high plateau capacity (105.0 mAh·g⁻¹ below 0.2 V at 0.05 A·g⁻¹), but also supplies more convenient pathways for ions and increases the rate capability (128.5 mAh·g⁻¹ at 3.2 A·g⁻¹). According to the kinetics analyses, it can be found that diffusion regulated surface induced capacitive process and Li-ions intercalation process are coexisted for lithium-ion storage. Additionally, LIC PGC-1300//AC constructed with pre-lithiated PGC-1300 anode and activated carbon (AC) cathode exhibited an increased energy density of 102.8 Wh·kg⁻¹, a power density of 6017.1 W·kg⁻¹, together with the excellent cyclic stability (91.6% retention after 10000 cycles at 1.0 A·g⁻¹).

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具有优化的高原容量和速率能力的 MOF 衍生多孔石墨碳，适用于高性能锂离子电容器

摘要开发具有高倍率能力和长充放电平台的负极材料是提高锂离子电容器（LIC）性能的关键。本文通过在 1300°C 下进行简便而稳定的碳化，并用盐酸溶液进行洗涤，制备了由新型三重互穿钴金属有机框架（Co-MOF）衍生的多孔石墨碳（PGC-1300）。所制备的 PGC-1300 具有优化的石墨化程度和多孔框架，这不仅有助于获得较高的高原容量（在 0.2 V 以下，0.05 A-g-1 时为 105.0 mAh-g-1），而且还为离子提供了更便捷的通路，提高了速率能力（在 3.2 A-g-1 时为 128.5 mAh-g-1）。根据动力学分析，可以发现扩散调节的表面诱导电容过程和锂离子插层过程共存于锂离子存储过程中。此外，用预锂化 PGC-1300 阳极和活性炭（AC）阴极构建的 PGC-1300//AC 锂离子电池的能量密度提高到 102.8 Wh-kg-1，功率密度达到 6017.1 W-kg-1，并且具有出色的循环稳定性（在 1.0 A-g-1 下循环 10000 次后，能量保持率为 91.6%）。

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来源期刊

International Journal of Minerals, Metallurgy, and Materials 工程技术-材料科学：综合

CiteScore

9.30

自引率

16.70%

发文量

205

审稿时长

2 months

期刊介绍： International Journal of Minerals, Metallurgy and Materials (Formerly known as Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material) provides an international medium for the publication of theoretical and experimental studies related to the fields of Minerals, Metallurgy and Materials. Papers dealing with minerals processing, mining, mine safety, environmental pollution and protection of mines, process metallurgy, metallurgical physical chemistry, structure and physical properties of materials, corrosion and resistance of materials, are viewed as suitable for publication.