气候变化领域集成服务门户(CCPortal): Pursuing graphite-based K-ion O2batteries: A lesson from Li-ion batteries

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DOI	10.1039/d0ee01361g
	Pursuing graphite-based K-ion O2batteries: A lesson from Li-ion batteries
	Qin L.; Zhang S.; Zheng J.; Lei Y.; Zhai D.; Wu Y.
发表日期	2020
ISSN	17545692
起始页码	3656
结束页码	3662
卷号	13 期号:10
英文摘要	The replacement of lithium metal by lithium intercalated graphite was crucial for developing safe lithium-ion batteries. Superoxide-based potassium-oxygen batteries represent an exciting metal-oxygen battery with the highest energy efficiencies. However, using potassium metal is a more serious safety threat than lithium. Herein, we explore the possibility of graphite-intercalation anodes for potassium-ion oxygen batteries (PIOBs) with enhanced safety. This work demonstrates for the first time that establishing an artificial potassium salt-rich solid electrolyte interphase (SEI) enables a reversible graphite-intercalation anode (249.6 mA h g-1 after 600 cycles) in a potassium bis(trifluoromethanesulfonyl)imide (KTFSI)-based localized high-concentration electrolyte. Such an electrolyte is stable with the superoxide cathode. The PIOB delivers energy efficiencies above 90% at a depth of discharge (DOD) of 25% for 80 cycles. A three-electrode measurement shows that its overpotential mainly comes from the anode. The lifespan is limited to the gradual degradation of the artificial SEI caused by oxygen crossover. This work represents a step towards achieving holistic anode-electrolyte-cathode compatibility in a PIOB and its realistic evaluation under a controlled DOD. © The Royal Society of Chemistry.
英文关键词	Anodes; Battery management systems; Cathodes; Energy efficiency; Graphite; Ions; Lithium compounds; Oxygen; Potassium; Solid electrolytes; Bis(trifluoromethane sulfonyl)imide; Concentration electrolyte; Depth of discharges; Gradual degradation; Intercalated graphite; Realistic evaluations; Solid electrolyte interphase; Three-electrode measurement; Lithium-ion batteries
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/189507
作者单位	Department of Chemistry and Biochemistry, Ohio State University, 100 West 18th Avenue, Columbus, OH 43210, United States; Shenzhen Key Lab. for Graphene-Based Mat. and Eng. Laboratory for Functionalized Carbon Materials, Shenzhen Geim Graphene Center, School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
推荐引用方式 GB/T 7714	Qin L.,Zhang S.,Zheng J.,et al. Pursuing graphite-based K-ion O2batteries: A lesson from Li-ion batteries[J],2020,13(10).
APA	Qin L.,Zhang S.,Zheng J.,Lei Y.,Zhai D.,&Wu Y..(2020).Pursuing graphite-based K-ion O2batteries: A lesson from Li-ion batteries.Energy & Environmental Science,13(10).
MLA	Qin L.,et al."Pursuing graphite-based K-ion O2batteries: A lesson from Li-ion batteries".Energy & Environmental Science 13.10(2020).