气候变化领域集成服务门户(CCPortal): Designing a hybrid electrode toward high energy density with a staged Li+ and PF6 − deintercalation/ intercalation mechanism

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DOI	10.1073/pnas.1918442117
	Designing a hybrid electrode toward high energy density with a staged Li+ and PF6 − deintercalation/ intercalation mechanism
	Hao J.; Yang F.; Zhang S.; He H.; Xia G.; Liu Y.; Didier C.; Liu T.; Pang W.K.; Peterson V.K.; Lu J.; Guo Z.
发表日期	2020
ISSN	0027-8424
起始页码	2815
结束页码	2823
卷号	117 期号:6
英文摘要	Existing lithium-ion battery technology is struggling to meet our increasing requirements for high energy density, long lifetime, and low-cost energy storage. Here, a hybrid electrode design is developed by a straightforward reengineering of commercial electrode materials, which has revolutionized the “rocking chair” mechanism by unlocking the role of anions in the electrolyte. Our proof-of-concept hybrid LiFePO4 (LFP)/graphite electrode works with a staged deintercalation/ intercalation mechanism of Li+ cations and PF6 − anions in a broadened voltage range, which was thoroughly studied by ex situ X-ray diffraction, ex situ Raman spectroscopy, and operando neutron powder diffraction. Introducing graphite into the hybrid electrode accelerates its conductivity, facilitating the rapid extraction/insertion of Li+ from/into the LFP phase in 2.5 to 4.0 V. This charge/discharge process, in turn, triggers the in situ formation of the cathode/ electrolyte interphase (CEI) layer, reinforcing the structural integrity of the whole electrode at high voltage. Consequently, this hybrid LFP/graphite-20% electrode displays a high capacity and long-term cycling stability over 3,500 cycles at 10 C, superior to LFP and graphite cathodes. Importantly, the broadened voltage range and high capacity of the hybrid electrode enhance its energy density, which is leveraged further in a full-cell configuration. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Hybrid electrode; Intercalation; Li-ion battery
语种	英语
scopus关键词	anion; graphite; hexafluorophosphate; lithium ion; unclassified drug; Article; chemical phenomena; deintercalation; electric conductivity; electric potential; energy; intercalation; neutron diffraction; priority journal; Raman spectrometry; X ray diffraction
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161061
作者单位	Hao, J., Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW 2522, Australia, School of Mechanical, Materials, Mechatronic, and Biomedical Engineering, Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong, NSW 2500, Australia; Yang, F., Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW 2522, Australia; Zhang, S., Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW 2522, Australia; He, H., Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW 2522, Australia; Xia, G., Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongon...
推荐引用方式 GB/T 7714	Hao J.,Yang F.,Zhang S.,et al. Designing a hybrid electrode toward high energy density with a staged Li+ and PF6 − deintercalation/ intercalation mechanism[J],2020,117(6).
APA	Hao J..,Yang F..,Zhang S..,He H..,Xia G..,...&Guo Z..(2020).Designing a hybrid electrode toward high energy density with a staged Li+ and PF6 − deintercalation/ intercalation mechanism.Proceedings of the National Academy of Sciences of the United States of America,117(6).
MLA	Hao J.,et al."Designing a hybrid electrode toward high energy density with a staged Li+ and PF6 − deintercalation/ intercalation mechanism".Proceedings of the National Academy of Sciences of the United States of America 117.6(2020).