Boron-containing chemicals as cathode additives, Si anode additives, electrolyte additives or separator modifiers for Li-ion batteries

An energy storage device comprising:

• a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode is a Si-based electrode;
• a separator between the first electrode and the second electrode;
• and
• an electrolyte composition;
• wherein
• said electrolyte composition comprises at least one electrolyte additive comprising a boron-containing compound;
• and
• wherein the boron-containing compound comprises one or more of:
• Cyclopropylboronic acid MIDA ester (CAS 1104637-36-6);
• 2-cyclobutyl-6-methyl-1,3,6,2-dioxazaborocane-4,8-dione (CAS:
• 1104637-37-7);
• 2-cyclopentyl-6-methyl-1,3,6,2-dioxazaborocane-4,8-dione (CAS:
• 117311-84-9);
• Phenylboronic acid trimeric anhydride;
• Thiophene-2-boronic acid pinacol ester;
• 4-Methylthiophene-3-boronic acid pinacol ester;
• 3-(5,5-Dimethyl-1,3,2-dioxaborinan-2-yl) pyridine;
• 3-Cyano-1-propylboronic acid pinacol ester;
• Cyclopropylboronic acid pinacol ester;
• Cyclohexylboronic acid pinacol ester;
• Pyridine-3-boronic acid 1,3-propanediol ester;
• 2,5-Difluoropyridine-4-boronic acid, pinacol estser (CAS:
• 1622217-35-9);
• or 2,6-Difluoropyridine-3,5-diboronic acid, pinacol ester (CAS:
• 1218789-90-2).

A method of forming an energy storage device, the method comprising:

• forming an energy storage device comprising a cathode, an electrolyte composition, and an anode;
• wherein said one or more of said cathode or said anode and/or said electrolyte composition comprise an additive compound;
• said additive compound comprising a boron-containing compound;
• wherein said one or both of said cathode and said anode is formed using, at least, the following steps:
• said electrode active material is mixed to create a slurry;
• said electrolyte composition is added to said slurry;
• said slurry is coated on metal foil;
• and
• the coated metal foil is dried;
• and
• wherein the boron-containing compound comprises one or more of:
• Cyclopropylboronic acid MIDA ester (CAS 1104637-36-6);
• 2-cyclobutyl-6-methyl-1,3,6,2-dioxazaborocane-4,8-dione (CAS:
• 1104637-37-7);
• 2-cyclopentyl-6-methyl-1,3,6,2-dioxazaborocane-4,8-dione (CAS:
• 117311-84-9);
• 2-cyclohexyl-6-methyl-1,3,6,2-dioxazaborocane-4,8-dione (CAS:
• 1104637-39-9);
• anhydride;
• Thiophene-2-boronic acid pinacol ester;
• 4-Methylthiophene-3-boronic acid pinacol ester;
• 3-(5,5-Dimethyl-1,3,2-dioxaborinan-2-yl) pyridine;
• 3-Cyano-1-propylboronic acid pinacol ester;
• Cyclopropylboronic acid pinacol ester;
• Cyclohexylboronic acid pinacol ester;
• Pyridine-3-boronic acid 1,3-propanediol ester;
• 2,5-Difluoropyridine-4-boronic acid, pinacol estser (CAS:
• 1622217-35-9);
• or 2,6-Difluoropyridine-3,5-diboronic acid, pinacol ester (CAS:
• 1218789-90-2).