气候变化领域集成服务门户(CCPortal): A graphite intercalation compound associated with liquid Na-K towards ultra-stable and high-capacity alkali metal anodes

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DOI	10.1039/c9ee00437h
	A graphite intercalation compound associated with liquid Na-K towards ultra-stable and high-capacity alkali metal anodes
	Zhang L.; Peng S.; Ding Y.; Guo X.; Qian Y.; Celio H.; He G.; Yu G.
发表日期	2019
ISSN	17545692
起始页码	1989
结束页码	1998
卷号	12 期号:6
英文摘要	Alkali metal anodes (Li, Na, K) are highly promising for enabling high-energy-density rechargeable batteries due to their high theoretical capacities and low redox potentials. Although extensive studies have been performed on Li-metal, dendrite growth and serious interface issues are still fundamental challenges for practical alkali metal batteries (AMBs). Here, we report an in situ-formed graphite intercalation compound (GIC) framework that enables Na-K liquid alloy to be used in ultra-stable and high-capacity anodes, attributed to the synergy of fast electron and mass transport of the GIC networks associated with the self-healing behavior of the Na-K alloy. The Na-K composite electrode is highly stable; it sustains repeated stripping/deposition over 5000 hours at 20 mA cm-2 and achieves stable electrodeposition even at 80 mA cm-2 and 16 mA h cm-2. When coupled with various cathodes, versatile AMBs are realized with long cycling and high operating voltages. This framework electrode design presents new insight into developing dendrite-free alkali metal anodes. © 2019 The Royal Society of Chemistry.
英文关键词	Anodes; Binary alloys; Graphite; Intercalation; Intercalation compounds; Metals; Redox reactions; Secondary batteries; Composite electrode; Electrode design; High capacity anode; High energy densities; Interface issues; Operating voltage; Redox potentials; Theoretical capacity; Sodium alloys; alkali metal; electrode; in situ measurement; liquid; potassium; sodium
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/189887
作者单位	Materials Science and Engineering Program, Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712, United States; State Key Laboratory of Fine Chemicals, RandD Center of Membrane Science and Technology, School of Chemical Engineering, Dalian University of Technology, Dalian, 116023, China
推荐引用方式 GB/T 7714	Zhang L.,Peng S.,Ding Y.,et al. A graphite intercalation compound associated with liquid Na-K towards ultra-stable and high-capacity alkali metal anodes[J],2019,12(6).
APA	Zhang L..,Peng S..,Ding Y..,Guo X..,Qian Y..,...&Yu G..(2019).A graphite intercalation compound associated with liquid Na-K towards ultra-stable and high-capacity alkali metal anodes.Energy & Environmental Science,12(6).
MLA	Zhang L.,et al."A graphite intercalation compound associated with liquid Na-K towards ultra-stable and high-capacity alkali metal anodes".Energy & Environmental Science 12.6(2019).