Lithium-ion storage in honeycomb-structured biomass-derived porous carbon

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Diamond and Related Materials Pub Date : 2024-11-19 DOI:10.1016/j.diamond.2024.111797

NurulHuda Shah , JinKiong Ling , Devu Bindhu , Ghufira , Izan Izwan Misnon , Chandrasekharan Nair Omanaamma Sreekala , Chun-Chen Yang , Rajan Jose

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Abstract

Honeycomb-shaped porous carbon (HSPC) offers unique surface properties for rapid ion transport through the bulk and hence could deliver desirable electrochemical charge storage performance; however, their fabrication is through time and cost intensive sacrificial template methods. Herein, HSPC was synthesized from a carefully selected plant component (coconut rachis) containing a dense network of phloem and xylem. The synthesized activated carbon has relatively high carbon content (>80 %), desirable textural characteristics (specific surface area ~ 1290 m²⸱g⁻¹ and pore diameter ~ 2.0 nm), and high edge-plane fraction (ratio between relative density of edge and basal plane ~0.26). The HSPC electrodes delivered specific capacitance up to ~126 F⸱g⁻¹ at 100 mA⸱g⁻¹ at a potential window of 2–4 V in the HSPC//LiPF₆//Li lithium metal capacitor configuration and retained ~98 % of its initial capacity after 1000 cycles with coulombic efficiency ~100 %. The performance of the device has been validated by electrochemical impedance spectroscopy before and after cycling. A postmortem analysis confirmed structural and chemical stability of the device upon cycling.

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蜂窝结构生物质多孔碳中的锂离子储存器

蜂窝状多孔碳（HSPC）具有独特的表面特性，可实现离子在体中的快速传输，因此可提供理想的电化学电荷存储性能；然而，其制造需要采用牺牲模板法，耗时长且成本高。在本文中，HSPC 是用精心挑选的植物成分（椰子轴）合成的，其中含有密集的韧皮部和木质部网络。合成的活性炭具有相对较高的含碳量（80%）、理想的质地特性（比表面积约为 1290 m2⸱g-1，孔径约为 2.0 nm）和较高的边缘平面分数（边缘平面和基底平面相对密度之比约为 0.26）。在 HSPC//LiPF6//Li 锂金属电容器配置中，当电位窗口为 2-4 V 时，HSPC 电极在 100 mA⸱g-1条件下的比电容高达约 126 F⸱g-1，并且在 1000 次循环后仍能保持约 98% 的初始容量，库仑效率约为 100%。循环前后的电化学阻抗光谱验证了该器件的性能。死后分析证实了该装置在循环后的结构和化学稳定性。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.