Safe ionic liquid-sulfolane/LiDFOB electrolytes for high voltage Li1.15(Ni0.36Mn0.64)0.85O2 lithium ion battery at elevated temperatures

Reducing Capacity and Voltage Decay of Co‐Free Li1.2Ni0.2Mn0.6O2 as Positive Electrode Material for Lithium Batteries Employing an Ionic Liquid‐Based Electrolyte

“…Additionally, the LiF peak is more pronounced in the CEI formed in ILE than in LP30, pointing to a higher content of LiF as a key component of the CEI in the electrolyte. [24] On the other hand, the intensity of the CO peak in the CEI formed in ILE is much lower than that in LP30, as expected for the absence of carbonate groups in the electrolyte solvent. The inorganic compound-rich CEI layer formed in ILE relates well with the higher electrochemical stability window of the electrolyte.…”

“…These mostly consist in either employing organic solvents as additives or operating the cell at elevated temperature. [22][23][24] Mixing different ILs with LiPF 6 and ethylene carbonate/dimethyl carbonate (EC/DMC) was shown to result in improved cycling stability compared to pure carbonate-based electrolytes. [13] Increasing the IL content leads to a reduced initial irreversible capacity loss and higher coulombic efficiency in the first cycle.…”

Deciphering the Interface of a High‐Voltage (5 V‐Class) Li‐Ion Battery Containing Additive‐Assisted Sulfolane‐Based Electrolyte

“…This suggests that the TMSP additive derived species are beneficial to form conductive and protective SEI layers on both electrodes (especially MCMB anode). To the best of our knowledge, this is the first attempt to directly evaluate high safety LiDFOB/SL‐based electrolytes in conventional Li‐ion full‐cells with intercalation type cathode and graphite anode.…”

“…In summary of the aforementioned background, the combination of LiDFOB and SL will be a promising electrolyte choice for the complicated 5 V‐class LiNi 0.5 Mn 1.5 O 4 /graphite battery. Actually, LiDFOB/SL has been always blended with linear alkyl carbonates, ionic liquid, acyclic sulfones . Despite these LiDFOB/SL‐based novel electrolytes are reported to demonstrate excellent compatibility with varied cathode materials (including LiNi 0.5 Mn 1.5 O 4 ) and graphite anode in half‐cell evaluation, their application in full‐cells are rarely concentrated.…”

Designing positive electrodes with high energy density for lithium-ion batteries

“…For example, a B 2 O 3coated nickel-rich layered oxide retained 85% of its capacity aer 200 cycles, signicantly more than that of a pristine compound (68%). 70 Another effective approach for the formation of a CEI is to utilize the oxidative decomposition of electrolytes or its additives that contain specic elements, such as boron, 41,[78][79][80][81][82][202][203][204][205][206][207] silicon, 203,206,[208][209][210][211][212] phosphorous, [83][84][85][86]207,[209][210][211][213][214][215][216][217][218][219][220][221] sulfur, 87,204,205,211,[222][223][224][225][226][227][228]…”