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首页> 外文期刊>Global change biology bioenergy >Study of the electrical conductivity of biobased carbonaceous powder materials under moderate pressure for the application as electrode materials in energy storage technologies
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Study of the electrical conductivity of biobased carbonaceous powder materials under moderate pressure for the application as electrode materials in energy storage technologies

机译：基于压力下施加的生物碳粉末材料的电导率作为储能技术中的电极材料研究

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This study focusses on the assessment of the electrical conductivity (EC) of biobased electrode materials for the application in energy storage devices and presents a simple and reproducible method to measure the EC of carbonaceous powders under moderate pressure (10–50?N). Based on the pyrolysis of corncob at three different temperatures (600, 800, and 900°C) and further treatments of the biochar obtained at 600°C, 11 different carbonaceous powder materials were produced including biochars, activated carbons, and composites. Composite materials were obtained by adding either metal oxide (RuOsub2/sub or Fesub3/subOsub4/sub) in different proportions or additives which are commonly used in electrode production (5?wt% binder and 15?wt% conductive additive). Furthermore, one physically activated commercial AC based on peat with a known EC of 33?S/m was treated with additives and used as a reference. For all materials, an increase of applied pressure resulted in higher EC values due to closer particle contact. The comparison of two methods (with and without preload) showed that a prepelletization of the samples is not necessary to obtain reliable results. By analyzing the obtained EC values while taking mechanical and physicochemical properties into account, it could be shown that a high carbonization temperature and high specific surface area favor the increase of EC. Furthermore, certain proportions of metal oxides lead to an improvement of EC (40?wt% RuOsub2/sub, 10?wt% Fesub3/subOsub4/sub), while the treatment with additives leads to a decrease of EC. The EC values among all samples varied between 0.8?S/m (biochar) and 408?S/m (AC/RuOsub2/sub composite) at the highest pressure level (637?kPa). Thus, promising biobased electrode materials for environmentally friendly energy storage technologies are presented with the aim of contributing to the establishment of a biobased resource and product platform for bioeconomy.
机译：本研究侧重于评估生物化电极材料的电导率（EC）在储能装置中的应用，并提出了一种在中等压力下测量碳质粉末EC的简单和可重复的方法（10-50ΩN）。基于三种不同温度（600,800和900℃）的玉米浦热解，并在600℃下获得的生物凝块的进一步处理，并制备11种不同的碳质粉末材料，包括Biochars，活性碳和复合材料。通过在常用电极中使用的不同比例或添加剂中加入金属氧化物（Ruo 2 或Fe 3 / sub> o 4-sub>）来获得复合材料。生产（5·wt％粘合剂和15μl％的导电添加剂）。此外，基于泥炭的一种物理活化的商业AC，其已知的33℃/ m为33℃，用添加剂处理并用作参考。对于所有材料，由于较近粒子接触，施加压力的增加导致额外的EC值。两种方法的比较（具有和不加强）表明样品的预热是不需要获得可靠的结果。通过在考虑机械和物理化学特性的同时分析所获得的EC值，可以示出高碳化温度和高比表面积赞成EC的增加。此外，某些比例的金属氧化物导致EC的改善（40〜wt％ruo 2 ，10·wt％Fe 3 O 4 ），而添加剂的治疗导致EC的降低。所有样品中的EC值在最高压力水平（637 kPa）处的0.8·s / m（Biochar）和408·s / m（AC / Ruo 2 复合材料）之间变化。因此，提出了用于环保能量存储技术的生物化电极材料，目的是有助于建立生物经济学的生物化资源和产品平台。

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