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Title: Additives for high voltage lithium ion batteries

Patent ·
OSTI ID:1771652
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This invention relates to a method for preparing an electrochemical cell comprising the sequential steps of preparing a solution of a lithium salt in an non-aqueous solvent containing an additive compound, and maintaining the solution at a temperature in the range of about 20 to about 30° C. for about 5 to 10 days to form an aged electrolyte; assembling an electrochemical cell from an anode, a cathode, and the aged electrolyte; and electrochemically subjecting the electrochemical cell to formation cycling. The additive compound comprises one or more compounds selected from the group consisting of: (R3SiO)3B, (R3SiO)3XY, (R3SiO)3P, (R′O)3PO, (R3Si)3X′, R3SiOS(O)2R′; (R3Si)OC(═O)R′; wherein each R and R′ independently is a hydrocarbyl group; X is P or B; Y is O or S; X is Ti or Al. Electrochemical cells and batteries also are described.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-06CH11357
Assignee:
UChicago Argonne, LLC (Chicago, IL)
Patent Number(s):
10,840,552
Application Number:
15/916,723
OSTI ID:
1771652
Resource Relation:
Patent File Date: 03/09/2018
Country of Publication:
United States
Language:
English

References (14)

Trimethylsily esters of phosphorus acids. II. Reactions of fluoro- and trifluoromethylphosphorus(V) oxides and sulfides with hexamethyldisiloxane and hexamethyldisilthiane and the synthesis of a novel phosphorane journal November 1972
Cycling Behavior of NCM523/Graphite Lithium-Ion Cells in the 3–4.4 V Range: Diagnostic Studies of Full Cells and Harvested Electrodes journal September 2016
Lifetime limit of tris(trimethylsilyl) phosphite as electrolyte additive for high voltage lithium ion batteries journal January 2016
Transition Metal Dissolution, Ion Migration, Electrocatalytic Reduction and Capacity Loss in Lithium-Ion Full Cells journal December 2016
Trimethylsilyl esters of phosphorus acids. I. Preparation and properties of esters of difluoro- and bis(trifluoromethyl)phosphinic, -thiophosphinic, and -dithiophosphinic acids journal November 1972
Materials for battery electrolytes and methods for use patent November 2012
Enabling High-Energy, High-Voltage Lithium-Ion Cells: Standardization of Coin-Cell Assembly, Electrochemical Testing, and Evaluation of Full Cells journal January 2016
Improving the High Voltage Cycling of Li[Ni 0.42 Mn 0.42 Co 0.16 ]O 2 (NMC442)/Graphite Pouch Cells Using Electrolyte Additives journal January 2014
Structural Changes and Thermal Stability of Charged LiNi x Mn y Co z O 2 Cathode Materials Studied by Combined In Situ Time-Resolved XRD and Mass Spectroscopy journal December 2014
Trimethylsilyl esters of phosphorus acids. III. Esters of difluoro- and bis(trifluoromethyl)phosphinous and thiophosphinous acids journal June 1973
Electrolyte and Lithium-ion Secondary Battery patent-application August 2016
Synthesis and characterisation of trimethylsilyl phosphorohalidates: Me3SiOP(O)FX (X = Cl, Br) and (Me3SiO)2P2O3F2 journal January 2004
Nonaqueous electrolyte solution, and lithium ion secondary battery having the same patent April 2016
A multifunctional phosphite-containing electrolyte for 5 V-class LiNi 0.5 Mn 1.5 O 4 cathodes with superior electrochemical performance journal January 2014

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