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DOI	10.1039/c6ee03185d
	High K-storage performance based on the synergy of dipotassium terephthalate and ether-based electrolytes
	Lei K.; Li F.; Mu C.; Wang J.; Zhao Q.; Chen C.; Chen J.
发表日期	2017
ISSN	17545692
起始页码	552
结束页码	557
卷号	10 期号:2
英文摘要	Potassium-ion batteries (KIBs) are strongly dependent on the development of anodes with high safety and good electrochemical performance. Here, we achieved excellent anode performance of KIBs based on the synergy of dipotassium terephthalate (K2TP) and a 1,2-dimethoxyethane (DME)-based electrolyte for the first time. The K2TP is featured as a typical layered structure with K+ transport channels. It delivers a large capacity of 249 mA h g-1 at 200 mA g-1 and a high capacity retention of 94.6% after 500 cycles of discharge and charge at 1000 mA g-1 with a Coulombic efficiency of 100%. This is attributed to the active carboxylate groups and the flexible molecular structure of K2TP, and the stable solid electrolyte interphase (SEI) formed in the DME-based electrolyte. Furthermore, the redox voltage around 0.6 V of K2TP favors K+ insertion rather than deposition during discharge. These make K2TP a promising anode material for KIBs, and encourage more investigations into the new system of KIBs. © The Royal Society of Chemistry 2017.
英文关键词	Anodes; Carboxylation; Anode performance; Carboxylate groups; Coulombic efficiency; Electrochemical performance; Layered Structures; Solid electrolyte interphase; Storage performance; Transport channel; Solid electrolytes; Coulomb criterion; electric field; electrode; electrolyte; ether; performance assessment; phthalate; potassium; synergism
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/190536
作者单位	Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China; Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin, 300071, China
推荐引用方式 GB/T 7714	Lei K.,Li F.,Mu C.,et al. High K-storage performance based on the synergy of dipotassium terephthalate and ether-based electrolytes[J],2017,10(2).
APA	Lei K..,Li F..,Mu C..,Wang J..,Zhao Q..,...&Chen J..(2017).High K-storage performance based on the synergy of dipotassium terephthalate and ether-based electrolytes.Energy & Environmental Science,10(2).
MLA	Lei K.,et al."High K-storage performance based on the synergy of dipotassium terephthalate and ether-based electrolytes".Energy & Environmental Science 10.2(2017).