气候变化领域集成服务门户(CCPortal): Exceptional energy and new insight with a sodium-selenium battery based on a carbon nanosheet cathode and a pseudographite anode

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DOI	10.1039/c6ee02274j
	Exceptional energy and new insight with a sodium-selenium battery based on a carbon nanosheet cathode and a pseudographite anode
	Ding J.; Zhou H.; Zhang H.; Stephenson T.; Li Z.; Karpuzov D.; Mitlin D.
发表日期	2017
ISSN	17545692
起始页码	153
结束页码	165
卷号	10 期号:1
英文摘要	We created a unique sodium ion battery (NIB, SIB) cathode based on selenium in cellulose-derived carbon nanosheets (CCNs), termed Se-CCN. The elastically compliant two-dimensional CCN host incorporates a high mass loading of amorphous Se (53 wt%), which is primarily impregnated into 1 cm3 g-1 nanopores. The results in facile sodiation kinetics due to short solid-state diffusion distances and a large charge transfer area of the nanosheets were established. The architecture also leads to an intrinsic resistance to polyselenide shuttle and to disintegration/coarsening. As a Na half-cell, the Se-CCN cathode delivers a reversible capacity of 613 mA h g-1 with 88% retention over 500 cycles. The exceptional stability is achieved by using a standard electrolyte (1 M NaClO4 EC-DMC) without secondary additives or high salt concentrations. The rate capability is also superb, achieving 300 mA h g-1 at 10C. Compared to recent state-of-the-art literature, the Se-CCN is the most cyclically stable and offers the highest rate performance. As a Se-Na battery, the system achieves 992 W h kg-1 at 68 W kg-1 and 384 W h kg-1 at 10 144 W kg-1 (by active mass in a cathode). We are the first to fabricate and test a Se-based full NIB, which is based on Se-CCN coupled to a Na intercalating pseudographitic carbon (PGC) anode. It is demonstrated that the PGC anode increases its structural order in addition to dilating as a result of Na intercalation at voltages below 0.2 V vs. Na/Na+. The {110} Na reflections are distinctly absent from the XRD patterns of PGC sodiated down to 0.001 V, indicating that the Na metal pore filling is not significant for pseudographitic carbons. The battery delivers highly promising Ragone chart characteristics, for example yielding 203 and 50 W h kg-1 at 70 and 14 000 W kg-1 (via total material mass in the anode and cathode). © The Royal Society of Chemistry 2017.
英文关键词	Anodes; Cathodes; Charge transfer; Diffusion in solids; Electric batteries; Electrolytes; Intercalation; Metal ions; Nanosheets; Secondary batteries; Selenium; High salt concentration; Intrinsic resistance; Rate capabilities; Rate performance; Reversible capacity; Sodium ion batteries; Solid-state diffusion; Structural ordering; Electrodes; amorphous medium; carbon; electrode; electrolyte; power generation; reaction kinetics; selenium; Anodes; Batteries; Lithium Compounds; Selenium
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/190595
作者单位	Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2V4, Canada; NorthEast Center for Chemical Energy Storage, State University of New York, Binghamton, NY 13902, United States; Alberta Center for Surface Engineering and Science (ACSES), University of Alberta, Edmonton, AB CA T6G 2G6, Canada; Chemical and Biomolecular Engineering, Clarkson University, Potsdam, NY 13699, United States
推荐引用方式 GB/T 7714	Ding J.,Zhou H.,Zhang H.,et al. Exceptional energy and new insight with a sodium-selenium battery based on a carbon nanosheet cathode and a pseudographite anode[J],2017,10(1).
APA	Ding J..,Zhou H..,Zhang H..,Stephenson T..,Li Z..,...&Mitlin D..(2017).Exceptional energy and new insight with a sodium-selenium battery based on a carbon nanosheet cathode and a pseudographite anode.Energy & Environmental Science,10(1).
MLA	Ding J.,et al."Exceptional energy and new insight with a sodium-selenium battery based on a carbon nanosheet cathode and a pseudographite anode".Energy & Environmental Science 10.1(2017).