Dual-graphite chemistry enabled by a high voltage electrolyte

A reversible dual-graphite intercalation chemistry with simultaneous accommodation of Li+ and PF6− in graphitic structures is enabled for the first time by a high voltage electrolyte based on a fluorinated solvent and additive, which is capable of supporting the chemistry at 5.2 V with high efficiency. This all-graphite battery promises an energy storage device of low cost, high safety and high environmental friendliness that are critical for large scale energy harvesting/storage needs.

[1]  K. Amine,et al.  Fluorinated electrolytes for Li-ion battery: An FEC-based electrolyte for high voltage LiNi0.5Mn1.5O4/graphite couple , 2013 .

[2]  Meiten Koh,et al.  Fluorinated electrolytes for 5 V lithium-ion battery chemistry , 2013 .

[3]  O. Borodin,et al.  Oxidative Stability and Initial Decomposition Reactions of Carbonate, Sulfone, and Alkyl Phosphate-Based Electrolytes , 2013 .

[4]  Kang Xu,et al.  Electrolyte Additive in Support of 5 V Li Ion Chemistry , 2011 .

[5]  Hochun Lee,et al.  Proton and hydrogen formation by cyclohexyl benzene during overcharge of Li-ion batteries , 2007 .

[6]  H. Matsumoto,et al.  Electrochemical Intercalation of Hexafluorophosphate Anion into Various Carbons for Cathode of Dual-Carbon Rechargeable Battery , 2007 .

[7]  Hyeong-Jin Kim,et al.  Comparison of Voltammetric Responses over the Cathodic Region in LiPF6 and LiBETI with and without HF , 2005 .

[8]  J. Dahn,et al.  Energy and Capacity Projections for Practical Dual‐Graphite Cells , 2000 .

[9]  J. Dahn,et al.  Electrochemical Intercalation of PF 6 into Graphite , 2000 .

[10]  M. Noel,et al.  Effect of solvents on the intercalation/de-intercalation behaviour of monovalent ionic species from non-aqueous solvents on polypropylene-graphite composite electrode , 1997 .

[11]  P. Trulove,et al.  Dual Intercalating Molten Electrolyte Batteries , 1994 .

[12]  Martin Winter,et al.  Reversible Intercalation of Bis(trifluoromethanesulfonyl)imide Anions from an Ionic Liquid Electrolyte into Graphite for High Performance Dual-Ion Cells , 2012 .