Agnieszka Swiderska-Mocek , Agnieszka Gabryelczyk , Kazimierz Fabin , Mirosława Pawlyta , Grzegorz Lota
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引用次数: 0
Abstract
The presented study strives to further the knowledge of materials for battery technologies based on the first alkali metal ions: lithium, sodium, and potassium. The primary aim of the discussed research was to assess the possibility of creating a universal anode material for those three battery chemistries and investigate the insertion process of different ions in that material. The proposed active material is shungite, a naturally occurring carbon-rich mineral whose turbostratic structure was demonstrated by TEM microscopy. The lithium and potassium-based batteries achieved a similar initial capacity of ∼160 mAh g−1 and were able to retain 147 and 133 mAh g−1 after 50 cycles, respectively. The discharge capacity of sodium battery was only 55 mAh g−1 but the capacity retention and cycle stability were satisfactory, which indicates that the low value is related to the mixed mechanism of sodium ion insertion/adsorption in the macroporous material instead of the degradation of the sodiated material over time. It was revealed that the purification process assisted with an ultrasound treatment develops the specific surface area of shungite and removes sulfur-based impurities. Such treatment significantly lowers the total cell impedance and enhances the battery cycling stability.
本研究旨在进一步了解基于第一种碱金属离子(锂、钠和钾)的电池技术材料。所讨论研究的主要目的是评估为这三种电池化学成分创建通用负极材料的可能性,并研究不同离子在该材料中的插入过程。所提议的活性材料是一种天然富碳矿物--霰石,其涡流结构已通过 TEM 显微镜得到证实。锂基电池和钾基电池的初始容量相近,均为∼160 mAh g-1,循环 50 次后分别能保持 147 mAh g-1 和 133 mAh g-1。钠电池的放电容量仅为 55 mAh g-1,但容量保持率和循环稳定性都令人满意,这表明其低值与钠离子在大孔材料中的插入/吸附混合机制有关,而不是钠化材料随着时间的推移而降解。结果表明,在超声波处理的辅助下进行的纯化过程可开发霰石的比表面积,并去除硫基杂质。这种处理方法大大降低了电池的总阻抗,提高了电池循环的稳定性。
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems