An effective approach to protect lithium anode and improve cycle performance for Li-S batteries.

Lithium oxalyldifluoroborate (LiODFB) has been investigated as an organic electrolyte additive to improve the cycling performance of Li-S batteries. Cell test results demonstrate that an appropriate amount of LiODFB added into the electrolyte leads to a high Coulombic efficiency. Analyses by energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and the density functional theory showed that LiODFB promotes the formation of a LiF-rich passivation layer on the lithium metal surface, which not only blocks the polysulfide shuttle, but also stabilizes the lithium surface.

[1]  B. Scrosati,et al.  Characteristics of the lithium electrode in organic and polymeric electrolytes , 1987 .

[2]  M. Garreau.  Cyclability of the lithium electrode , 1987 .

[3]  R. Muller,et al.  Impedance of Lithium Electrodes in a Propylene Carbonate Electrolyte , 1987 .

[4]  Hiroshi Tamura,et al.  XPS Analysis of Lithium Surfaces Following Immersion in Various Solvents Containing LiBF4 , 1995 .

[5]  Yuriy V. Mikhaylik,et al.  Polysulfide Shuttle Study in the Li/S Battery System , 2004 .

[6]  Shengbo Zhang,et al.  An unique lithium salt for the improved electrolyte of Li-ion battery , 2006 .

[7]  Kang Xu,et al.  EIS study on the formation of solid electrolyte interface in Li-ion battery , 2006 .

[8]  Shengbo Zhang.  A review on electrolyte additives for lithium-ion batteries , 2006 .

[9]  Shengbo Zhang.  Electrochemical study of the formation of a solid electrolyte interface on graphite in a LiBC2O4F2-based electrolyte , 2007 .

[10]  M. Armand,et al.  Building better batteries , 2008, Nature.

[11]  L. Nazar,et al.  A highly ordered nanostructured carbon-sulphur cathode for lithium-sulphur batteries. , 2009, Nature materials.

[12]  Doron Aurbach,et al.  On the Surface Chemical Aspects of Very High Energy Density, Rechargeable Li–Sulfur Batteries , 2009 .

[13]  Jason Xu,et al.  High Energy Rechargeable Li-S Cells for EV Application: Status, Remaining Problems and Solutions , 2010 .

[14]  L. Nazar,et al.  Advances in Li–S batteries , 2010 .

[15]  H. Dai,et al.  Graphene-wrapped sulfur particles as a rechargeable lithium-sulfur battery cathode material with high capacity and cycling stability. , 2011, Nano letters.

[16]  Li Li,et al.  Improvement of Rate and Cycle Performence by Rapid Polyaniline Coating of a MWCNT/Sulfur Cathode , 2011 .

[17]  Guangyuan Zheng,et al.  Hollow carbon nanofiber-encapsulated sulfur cathodes for high specific capacity rechargeable lithium batteries. , 2011, Nano letters.

[18]  Chunsheng Wang,et al.  Sulfur-impregnated disordered carbon nanotubes cathode for lithium-sulfur batteries. , 2011, Nano letters.

[19]  Li Li,et al.  Sulfur/Polythiophene with a Core/Shell Structure: Synthesis and Electrochemical Properties of the Cathode for Rechargeable Lithium Batteries , 2011 .

[20]  Jean-Marie Tarascon,et al.  Li-O2 and Li-S batteries with high energy storage. , 2011, Nature materials.

[21]  Xie Kai,et al.  Effect of LiBOB as additive on electrochemical properties of lithium–sulfur batteries , 2012, Ionics.

[22]  L. Archer,et al.  Porous hollow carbon@sulfur composites for high-power lithium-sulfur batteries. , 2011, Angewandte Chemie.

[23]  Jinghua Guo,et al.  Graphene oxide as a sulfur immobilizer in high performance lithium/sulfur cells. , 2011, Journal of the American Chemical Society.

[24]  Shengbo Zhang,et al.  Effect of Discharge Cutoff Voltage on Reversibility of Lithium/Sulfur Batteries with LiNO3-Contained Electrolyte , 2012 .

[25]  Preparation, Thermal Stability and Electrochemical Properties of LiODFB , 2012 .

[26]  Shengdi Zhang.  Role of LiNO3 in rechargeable lithium/sulfur battery , 2012 .

[27]  Shizhao Xiong,et al.  Properties of surface film on lithium anode with LiNO3 as lithium salt in electrolyte solution for lithium–sulfur batteries , 2012 .

[28]  Jun Liu,et al.  A Soft Approach to Encapsulate Sulfur: Polyaniline Nanotubes for Lithium‐Sulfur Batteries with Long Cycle Life , 2012, Advanced materials.

[29]  Shengbo Zhang,et al.  Liquid electrolyte lithium/sulfur battery: Fundamental chemistry, problems, and solutions , 2013 .

[30]  Nancy J. Dudney,et al.  Phosphorous Pentasulfide as a Novel Additive for High‐Performance Lithium‐Sulfur Batteries , 2013 .

[31]  D. Abraham,et al.  Mechanistic Insight into the Protective Action of Bis(oxalato)borate and Difluoro(oxalate)borate Anions in Li-Ion Batteries. , 2013 .

[32]  A. Manthiram,et al.  Challenges and prospects of lithium-sulfur batteries. , 2013, Accounts of chemical research.

[33]  C. Liang,et al.  Lithium superionic sulfide cathode for all-solid lithium-sulfur batteries. , 2013, ACS nano.

[34]  Li Li,et al.  Graphene-based three-dimensional hierarchical sandwich-type architecture for high-performance Li/S batteries. , 2013, Nano letters.

[35]  D. Abraham,et al.  Electrolyte additive combinations that enhance performance of high-capacity Li1.2Ni0.15Mn0.55Co0.1O2–graphite cells , 2013 .

[36]  Khalil Amine,et al.  Ultrasound Assisted Design of Sulfur/Carbon Cathodes with Partially Fluorinated Ether Electrolytes for Highly Efficient Li/S Batteries , 2013, Advanced materials.

[37]  Zhengcheng Zhang,et al.  Improved performance of lithium–sulfur battery with fluorinated electrolyte , 2013 .

[38]  Michel Armand,et al.  A new class of Solvent-in-Salt electrolyte for high-energy rechargeable metallic lithium batteries , 2013, Nature Communications.

[39]  Shuru Chen,et al.  Bis(2,2,2-trifluoroethyl) ether as an electrolyte co-solvent for mitigating self-discharge in lithium-sulfur batteries. , 2014, ACS applied materials & interfaces.