154 0 obj Chemistry Ionic Bonds Writing Ionic Formulas. degree under the supervision of Prof. Yunjian Liu at Jiangsu University. By continuing you agree to the use of cookies. He is currently a faculty in the College of Chemical and Biological Engineering at Zhejiang University. Privacy Ykh f��&E�Fۈ�ˢ�\FM�e. false These metrics are regularly updated to reflect usage leading up to the last few days. His research focuses on the synthesis of advanced materials for energy applications including lithium-ion batteries, lithium–sulfur batteries, solid electrolytes, sodium batteries, fuel cells, and heterogeneous catalysis. 10.1073/pnas.1504901112 There has been increasing interest in new materials capable of accommodating more than one Li per transition-metal center, thereby yielding higher charge storage capacities. [3], The THF-soluble triethylborane adduct of lithium sulfide can be generated using superhydride. Lithium-rich layered structure cathode materials are arousing significant attention in the next-generation commercial lithium ion batteries owing to their high capacity and energy density. https://doi.org/10.1016/j.nanoen.2019.01.080. https://pubs.acs.org/doi/10.1021/jacs.0c00909, http://pubs.acs.org/page/copyright/permissions.html, https://doi.org/10.1021/acs.jpclett.0c02543, https://doi.org/10.1016/j.electacta.2020.137471, https://doi.org/10.1016/j.joule.2020.05.004. 2015-06-11 Chengdu Liang received his Ph.D. in Materials Chemistry and Analytical Chemistry at the University of Tennessee Knoxville in 2005. www.pnas.org Since the sulfide ion has two extra valence electrons, it needs two lithium ions to share each electron. His research interest is on advanced cathode materials for lithium ion batteries. The mechanism of the dramatic improvement is also systematic investigated for the first time. If you were asked to confirm the identity of an unknown chemical as lithium sulfide (Li 2 S), describe the tests that you would use to confirm the identity. The materials presented here have the added benefit of avoiding resource-sensitive transition metals such as Co and Ni. Use your results in both Exercise 1 and Exercise 2 to describe the observations in both the cation and anion tests that would allow the unknown to be confirmed as lithium sulfide. How do I write #Sn(NO_3)_2# in Ionic formula? Li2SO3 is the formula for lithium sulfite (where the numbers should be written as subscripts). His research focuses on the synthesis of advanced materials for energy and biological applications. Yunjian Liu received his Ph.D. degree at the Central South University in 2009. 2015-06-11 <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/Thumb 60 0 R/Type/Page>> The structural response to the oxidation processes is found to be different in Li2FeS2 in contrast to that in LiNaFeS2, which we suggest is the cause for capacity fade in the early cycles of LiNaFeS2. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. 64 0 obj Information about how to use the RightsLink permission system can be found at You have to login with your ACS ID befor you can login with your Mendeley account. Ex situ and operando structural and spectroscopic data indicate that delithiation results in reversible oxidation of Fe2+ concurrent with an increase in the covalency of the Fe–S interactions, followed by reversible anion redox: 2 S2–/(S2)2–. Exploring Cation–Anion Redox Processes in One-Dimensional Linear Chain Vanadium Tetrasulfide Rechargeable Magnesium Ion Cathodes. Please reconnect. Chemistry of the Elements (2nd Edn. 34 0 obj The co-doped Li1.12Na0.08Ni0.2Mn0.6O1.95F0.05 exhibits an excellent cycling stability (100% after 100 cycles at 0.2 C) and a superior rate performance (167 mAh g−1 at 5 C). He started his career as a staff scientist at the Center for Nanophase Materials Sciences of Oak Ridge National Lab in 2006. Formula: Cation: Anion: Name: Formula:PbF2. Experimental details on Na2S and electrolyte preparation, details on the electrochemical cell for operando XRD, list of potential impurities in Li2FeS2 and LiNaFeS2, synchrotron XRD of Li2FeS2 and LiNaFeS2 with corresponding Rietveld refinements shown on a logarithmic scale, Rietveld refinements of LiNaFeS2 with varying degrees of site mixing, direct comparisons of the galvanostatic profiles for Li2FeS2 and LiNaFeS2 plotted vs normalized capacity, galvanostatic cycling profiles at varying C rates of Li2FeS2 and LiNaFeS2, GITT data of the second charge of Li2FeS2 and LiNaFeS2, GITT data of the first discharge of Li2FeS2 and LiNaFeS2, representative galvanostatic cycling curves showing points where ex situ spectroscopy was measured, operando XRD showing the full Q range, positions of selected diffraction peaks as a function of charging, evolution of the (001) reflection during delithiation of Li2FeS2, XRD of Li2FeS2 vs a composite electrode, Fe EXAFS fits for Li2FeS2 and LiNaFeS2, and values obtained from the Fe EXAFS fits (PDF). S K-edge spectroscopy unequivocally proves the contribution of the anions to the redox processes. Furthermore, we also believe that the cation/anion co-doping approach could be employed to improve the performance of other classes of layered cathode materials. endobj !l��2� If you were asked to confirm the identity of an unknown chemical as lithium sulfide (Li2S), describe the tests that you would use to confirm the identity. without permission from the American Chemical Society. 2015-06-11T14:04:17+05:30 Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States, Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States, Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States, Materials Department, University of California, Santa Barbara, California 93106, United States, Multielectron, Cation and Anion Redox in Lithium-Rich Iron Sulfide Cathodes. You’ve supercharged your research process with ACS and Mendeley! 2020-11-26T14:07:42-08:00 Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. the Altmetric Attention Score and how the score is calculated. In this study, we pioneer a novel cation/anion (sodium/fluorine) co-doping approach to address the above issues for lithium rich Li1.2Ni0.2Mn0.6O2 cathode. <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/Thumb 123 0 R/Type/Page>> 1 Answer anor277 Jun 1, 2018 #Li_2S# Explanation: ... Why are polyatomic ions covalent? ), Oxford:Butterworth-Heinemann. endstream How do you write ionic formulas for binary compounds? Name of metal cation is written as name of element. <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/Thumb 16 0 R/Type/Page>> It crystallizes in the antifluorite motif, described as the salt (Li )2S . false Thus, the Lewis dot diagram for Li{eq}_2 {/eq}S is shown accordingly. What is the ionic formula for lithium oxide? Table 3: lonic Compounds Compound Name Lithium sulfide Formula Cation Anion Cations + anions Formula 1 Formula Li* Total # of ions LizS S2- 2+1 3 Calcium sulfate CasO S0 1+1-2 Silver chlorate AgCIo CIO Aa Iron(IlI) carbonate Fe* co,2 2+3-5 Fe C03 Zno Zine … degree at Shaanxi University of Science & Technology in 2016. @�x�h�;���8�fB@/5� ��A��C�,[x�@�J�)L5զ�dbs'�}�x����� The American Chemical Society holds a copyright ownership interest in any copyrightable Supporting This reaction is conveniently conducted in anhydrous ammonia. [5], Except where otherwise noted, data are given for materials in their. Formula: Cation: Anion: Name: Formula: Na2CO3 Lithium sulfide (Li2S) Lithium sulphide, anhydrous. Busheng Wang, Isabelle Braems, Shunsuke Sasaki, Frédéric Guégan, Laurent Cario, Stéphane Jobic. & 3. Cation: Anion: Name: lithium bromide. William E. Gent, Iwnetim Iwnetu Abate, Wanli Yang, Linda F. Nazar, William C. Chueh. %PDF-1.5 %���� Synergetic effects of cation (K+) and anion (S2−)-doping on the structural integrity of Li/Mn-rich layered cathode material with considerable cyclability and high-rate capability for Li-ion batteries. His research interests mainly focus on advanced cathode materials for lithium ion batteries and functional polymer binders for energy storage materials.


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