气候变化领域集成服务门户(CCPortal): Alternative electrochemical energy storage: Potassium-based dual-graphite batteries

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DOI	10.1039/c7ee01535f
	Alternative electrochemical energy storage: Potassium-based dual-graphite batteries
	Beltrop K.; Beuker S.; Heckmann A.; Winter M.; Placke T.
发表日期	2017
ISSN	17545692
起始页码	2090
结束页码	2094
卷号	10 期号:10
英文摘要	In this contribution, we report for the first time a novel potassium ion-based dual-graphite battery concept (K-DGB), applying graphite as the electrode material for both the anode and cathode. The presented dual-graphite cell utilizes a potassium ion containing, ionic liquid (IL)-based electrolyte, synergetically combining the extraordinary properties of potassium, graphite and ILs in terms of cost effectiveness, sustainability and safety. The IL electrolyte shows a very stable cycling performance in combination with the graphite anode at a so far not reported reversible capacity of ≈230 mA h g-1. A highly reversible capacity of >42 mA h g-1 (with respect to the graphite cathode) even at a current of 250 mA g-1, and a Coulombic efficiency (CE) exceeding 99% in a potential range from 3.4 V to 5.0 V vs. K/K+ represent the corner pillars of this innovative battery technology. The very promising electrochemical performance is further emphasized by a capacity retention of 95% after 1500 cycles. Furthermore, the electrochemical formation of a stage-1 potassium graphite intercalation compound (K-GIC) from an IL electrolyte, resulting in a stoichiometry of KC8 is presented in this work for the first time. The presented results shed new light on an alternative energy storage technology, especially in view of stationary ("grid") energy storage by employing environmentally friendly, abundant and recyclable materials. © The Royal Society of Chemistry.
英文关键词	Anodes; Cathodes; Cost effectiveness; Electric batteries; Electrodes; Electrolytes; Energy storage; Graphite; Intercalation; Intercalation compounds; Ionic liquids; Secondary batteries; Storage (materials); Alternative energy; Coulombic efficiency; Electrochemical energy storage; Electrochemical formation; Electrochemical performance; Electrode material; Recyclable material; Reversible capacity; Potassium compounds; alternative energy; electrochemical method; electrode; electrolyte; graphite; ionic liquid; potassium; recycling
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190397
作者单位	University of Münster, MEET Battery Research Center, Corrensstr. 46, Münster, 48149, Germany; Helmholtz Institute Münster, IEK-12, Forschungszentrum Jülich, Corrensstr. 46, Münster, 48149, Germany
推荐引用方式 GB/T 7714	Beltrop K.,Beuker S.,Heckmann A.,et al. Alternative electrochemical energy storage: Potassium-based dual-graphite batteries[J],2017,10(10).
APA	Beltrop K.,Beuker S.,Heckmann A.,Winter M.,&Placke T..(2017).Alternative electrochemical energy storage: Potassium-based dual-graphite batteries.Energy & Environmental Science,10(10).
MLA	Beltrop K.,et al."Alternative electrochemical energy storage: Potassium-based dual-graphite batteries".Energy & Environmental Science 10.10(2017).