Aesculus indica-derived heteroatom-doped carbon as an electrode material for super-capacitor

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2023-07-05 DOI:10.1007/s42823-023-00565-5

Fakhar Zaman, Muhammad Waqas Ishaq, Aisha Munawar, Umer Younas, Zahid Ali

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Abstract

Energy storage for sustainable development and progress of power production industries is vitally important. The energy storage devices are under extensive research from last three decades to ensure the hand-on-hand coordination with power supply phenomenon and to reduce the energy loses in lines. The cost-effective materials are still highly demanding as an electrode material for energy storage devices. Biomass-derived carbon materials are best candidates due to their low cost, relatively high abundance, pollution-free nature. Here, we are reporting a facile two-step green approach to convert Himalayan horse chestnuts (HHCNs) into activated carbon materials. In first step, grinding and pyrolysis of the HHCNs were carried out, and then activation was performed using KOH to enhance the pore density and surface area. HHCNs-derived carbon was utilized as an electrode in electrical double-layer capacitors (EDLCs) with 1 M H₂SO₄ as an electrolyte. The macro-porous structure along with hierarchical porous network acts as an efficient source of transportation of charges across the electrode and separator. Cyclic voltammetry test was taken from 10 to 100 mV/s current and within a range of 0–1 V applied potential; approximately rectangular CV shown mirror response towards current and shown typical EDLCs properties. The proximate analysis confirms the presence of heteroatoms like sulfur, oxygen, and nitrogen which act as carbon dopants. The wettability of HHCNs-derived carbon enhanced due to the various types of oxygen functionalities inherited from the lignin skeletal part. The nitrogen content is primarily responsible for the pseudo-capacitive behavior of HHCNs-codoped carbon. HHCNs-derived activated carbon materials has emerged as a promising electrode material for energy storage applications.

Graphical abstract

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七叶树衍生的杂原子掺杂碳作为超级电容器电极材料

储能对于电力生产工业的可持续发展和进步至关重要。为了保证与供电现象的手拉手协调，减少线路中的能量损失，储能装置在近三十年来得到了广泛的研究。这种具有成本效益的材料作为储能装置的电极材料仍然要求很高。由于其低成本、相对高丰度和无污染的特性，生物质衍生碳材料是最佳的候选者。在这里，我们报告了一种简单的两步绿色方法，将喜马拉雅七叶树(HHCNs)转化为活性炭材料。首先对HHCNs进行研磨和热解，然后用KOH进行活化，以提高孔隙密度和比表面积。研究了以1 M H2SO4为电解液，以hhcn碳为电极的双层电电容器(edlc)。大孔结构和分层多孔网络作为电荷在电极和分离器之间传输的有效来源。循环伏安法测试电流为10 ~ 100 mV/s，外加电位为0 ~ 1 V;近似矩形CV显示出对电流的镜像响应，并显示出典型的edlc特性。近似分析证实了硫、氧和氮等杂原子的存在，这些杂原子可以作为碳掺杂剂。由于木质素骨架部分继承了各种类型的氧官能团，hhcn衍生碳的润湿性增强。氮含量是影响hhcn -共掺杂碳赝电容行为的主要因素。hhcn衍生的活性炭材料已成为一种很有前途的储能电极材料。图形抽象

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.