气候变化领域集成服务门户(CCPortal): Harnessing the concurrent reaction dynamics in active Si and Ge to achieve high performance lithium-ion batteries

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DOI	10.1039/c8ee00239h
	Harnessing the concurrent reaction dynamics in active Si and Ge to achieve high performance lithium-ion batteries
	Zhang Q.; Chen H.; Luo L.; Zhao B.; Luo H.; Han X.; Wang J.; Wang C.; Yang Y.; Zhu T.; Liu M.
发表日期	2018
ISSN	17545692
起始页码	669
结束页码	681
卷号	11 期号:3
英文摘要	Advanced composite electrodes containing multiple active components are often used in lithium-ion batteries for practical applications. The performance of such heterogeneous composite electrodes can in principle be enhanced by tailoring the concurrent reaction dynamics in multiple active components for promoting their collective beneficial effects. However, the potential of this design principle has remained uncharted to date. Here we develop a composite anode of Cu/Si/Ge nanowire arrays, where each nanowire consists of a core of Cu segments and a Si/Ge bilayer shell. This unique electrode architecture exhibited a markedly improved electrochemical performance over the reference Cu/Si systems, demonstrating a stable capacity retention (81% after 3000 cycles at 2C) and doubled specific capacity at a rate of 16C (1C = 2 A g-1). By using in situ transmission electron microscopy and electrochemical testing, we unravel a novel reaction mechanism of dynamic co-lithiation/co-delithiation in the active Si and Ge bilayer, which is shown to effectively alleviate the electrochemically induced mechanical degradation and thus greatly enhance the long-cycle stability of the electrode. Our findings offer insights into a rational design of high-performance lithium-ion batteries via exploiting the concurrent reaction dynamics in the multiple active components of composite electrodes. © The Royal Society of Chemistry 2018.
英文关键词	Anodes; Dynamics; Electric batteries; Electrochemical electrodes; Electrodes; Germanium; High resolution transmission electron microscopy; In situ processing; Ions; Lithium; Nanowires; Silicon; Transmission electron microscopy; Advanced composites; Electrochemical performance; Electrochemical testing; Electrode architecture; Heterogeneous composites; High-performance lithium-ion batteries; In-situ transmission electron microscopies; Mechanical degradation; Lithium-ion batteries; chemical reaction; composite; design; efficiency measurement; electrochemical method; electrode; fuel cell; germanium; performance assessment; silicon
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/190302
作者单位	Department of Materials Science and Engineering, Xiamen University, Xiamen Fujian, 361005, China; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen, 361005, China; Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen, 361005, China; Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; Semiconductor Photonics Research Center, Department of Physics, Xiamen University, Xiamen, 361005, China; Center of Electron Microscopy, State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
推荐引用方式 GB/T 7714	Zhang Q.,Chen H.,Luo L.,et al. Harnessing the concurrent reaction dynamics in active Si and Ge to achieve high performance lithium-ion batteries[J],2018,11(3).
APA	Zhang Q..,Chen H..,Luo L..,Zhao B..,Luo H..,...&Liu M..(2018).Harnessing the concurrent reaction dynamics in active Si and Ge to achieve high performance lithium-ion batteries.Energy & Environmental Science,11(3).
MLA	Zhang Q.,et al."Harnessing the concurrent reaction dynamics in active Si and Ge to achieve high performance lithium-ion batteries".Energy & Environmental Science 11.3(2018).