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DOI	10.1039/d0ee02230f
	High energy density anodes using hybrid Li intercalation and plating mechanisms on natural graphite
	Son Y.; Lee T.; Wen B.; Ma J.; Jo C.; Cho Y.-G.; Boies A.; Cho J.; De Volder M.
发表日期	2020
ISSN	1754-5692
起始页码	3723
结束页码	3731
卷号	13 期号:10
英文摘要	Lithium plating on conventional graphite anodes in lithium-ion batteries is typically considered an undesirable side reaction, a safety hazard or a degradation mechanism. However, lithium plating and stripping allow for efficient energy storage, and therefore various new porous anode designs with tailored surface coatings and electrolyte systems have been proposed to achieve reversible Li plating and stripping. Unfortunately, these material designs often rely on highly porous plating scaffolds with an overall lower volumetric energy and power density than conventional graphite anodes. Herein, a novel anode design is presented which leverages the good volumetric performance of industrial graphite anodes and further enhances their capacity by allowing for a reversible Li plating on their surface. The latter is achieve by conformally coating them with a nanoscale lithiophilic Si coating. As a result, excellent volumetric energy densities of 656 mA h cm-3 and gravimetric capacities of 551 mA h g-1 are achieved, which are a clear improvement compared to the commercial graphite anode (app. 570 mA h cm-3 and 360 mA h g-1 respectively). Moreover, by carefully balancing the thickness of the Si layer and the plating capacity, a capacity retention close to 100% is achieved after 200 cycles in half cells. Overall, this approach leverages the advances in industrial graphite anode manufacturing while at the same time embracing the additional capacity offered by reversible plating and stripping of Li metal, resulting in full cells energy densities of 474 W h kg-1 and 912 W h L-1, which is a step forward compared to previous Li metal and graphite anodes. © The Royal Society of Chemistry.
语种	英语
scopus关键词	Degradation; Electrolytes; Energy storage; Graphite; Lithium-ion batteries; Plating; Silicon; Stripping (removal); Capacity retention; Degradation mechanism; Electrolyte systems; Gravimetric capacity; High energy densities; Tailored surfaces; Volumetric energy; Volumetric energy densities; Anodes
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162769
作者单位	Department of Engineering, University of Cambridge, 17 Charles Babbage Road, Cambridge, CB3 0FS, United Kingdom; Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea; Cambridge Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, Cambridge, CB3 0FA, United Kingdom; School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul, 06974, South Korea; Department of Nanoengineering, University of California, San Diego, CA 92093-0448, United States
推荐引用方式 GB/T 7714	Son Y.,Lee T.,Wen B.,et al. High energy density anodes using hybrid Li intercalation and plating mechanisms on natural graphite[J],2020,13(10).
APA	Son Y..,Lee T..,Wen B..,Ma J..,Jo C..,...&De Volder M..(2020).High energy density anodes using hybrid Li intercalation and plating mechanisms on natural graphite.Energy and Environmental Science,13(10).
MLA	Son Y.,et al."High energy density anodes using hybrid Li intercalation and plating mechanisms on natural graphite".Energy and Environmental Science 13.10(2020).