Novolyte Technologies, Inc.

Arizona State University

Basf Corporation

Ferro Corporation

Wu Xu

Pascal Bolomey

Zhongyi Deng

Charles Austen Angell

Martin W Payne

Jerry L Decker

John R Sans

Vaikunth Sitaram Prabhu

Masahiro Yoshizawa

C Austen Angell

Jean-Philippe Belieres

Deng Zhongyi

Bolomey Pascal

Xiaoguang Sun

Yali Research And Development Center Zhang

A method for making a lithium battery or lithium ion battery having nitrogen silylated compounds as additives in a nonaqueous electrolytic solution. Batteries using this electrolytic solution have long cycle life and high capacity retention.

Method for making electrochemical cells

Non-aqueous electrolyte solutions capable of protecting negative electrode materials such as lithium metal and carbonaceous materials in energy storage electrochemical cells (e.g., lithium metal batteries, lithium ion batteries and supercapacitors) include an electrolyte salt, a non-aqueous electrolyte solvent mixture, an unsaturated organic compound 4-methylene-1,3-dioxolan-2-one or 4,5-dimethylene-1,3-dioxolan-2-one, and other optional additives. The 1,3-dioxolan-2-ones help to form a good solid electrolyte interface on the negative electrode surface.

Non-aqueous electrolytic solutions and electrochemical cells comprising the same

Nitrogen silylated compounds are useful as additives in a nonaqueous electrolytic solution. The electrolytic solution including such additives is suitable for use in electrochemical cells such as lithium and lithium ion batteries. Batteries using this electrolytic solution have long cycle life and high capacity retention.

Nitrogen silylated compounds as additives in non-aqueous solutions for electrochemical cells

Disclosed are developments in high temperature fuel cells including ionic liquids with high temperature stability and the storage of inorganic acids as di-anion salts of low volatility. The formation of ionically conducting liquids of this type having conductivities of unprecedented magnitude for non-aqueous systems is described. The stability of the di-anion configuration is shown to play a role in the high performance of the non-corrosive proton-transfer ionic liquids as high temperature fuel cell electrolytes. Performance of simple H(g) electrolyte/O(g) fuel cells with the new electrolytes is described. Superior performance both at ambient temperature and temperatures up to and above 200&#xb0; C. are achieved. Both neutral proton transfer salts and the acid salts with HSOanions, give good results, the bisulphate case being particularly good at low temperatures and very high temperatures. The performance of all electrolytes is improved by the addition of a small amount of involatile base of pKvalue intermediate between those of the acid and base that make the bulk electrolyte. The preferred case is the imidazole-doped ethylammonium hydrogensulfate which yields behavior superior in all respects to that of the industry standard phosphoric acid electrolyte.

Ionic liquids and ionic liquid acids with high temperature stability for fuel cell and other high temperature applications, method of making and cell employing same

A process is provided to produce non-aqueous electrolytic solution for use in batteries having low acid content and low water content. The invention involves removing acids and water from non-aqueous electrolytic solutions typically found in lithium or lithium-ion batteries by using nitrogen-containing compounds such as triazines. After treatment by a triazine such as melamine, the concentrations of acids and water in the electrolytic solutions are substantially decreased. The present invention provides a process to prepare extremely pure electrolytic solutions having low (&#x3c;20 ppm) concentrations of both water and acids.

Triazine compounds for removing acids and water from nonaqueous electrolytes for electrochemical cells

The invention relates to the use of an amine oxide as an additive in a nonaqueous electrolytic solution. The electrolytic solution is suitable for use in electrochemical cells such as lithium batteries and lithium ion batteries. Batteries using this electrolyte solution have long life and high capacity retention.

Nonaqueous electrolytic solution for electrochemical cells

The invention relates to the use of aromatic phosphite compounds as stabilizers for nonaqueous electrolytic solutions containing halogenated salts such as LiPFand LiBF. The electrolyte containing such a phosphite exhibits excellent shelf life storage at ambient and high temperatures. The electrolytic solution is suitable for use in electrochemical cells such as lithium (ion) rechargeable batteries and supercapacitors.

Stabilized nonaqueous electrolytes for rechargeable batteries

Orthoborate salts suitable for use as electrolytes in lithium batteries and methods for making the electrolyte salts are provided. The electrolytic salts have one of the formulae (I). In this formula anionic orthoborate groups are capped with two bidentate chelating groups, Y1 and Y2. Certain preferred chelating groups are dibasic acid residues, most preferably oxalyl, malonyl and succinyl, disulfonic acid residues, sulfoacetic acid residues and halo-substituted alkylenes. The salts are soluble in non-aqueous solvents and polymeric gels and are useful components of lithium batteries in electrochemical devices.

Electrolytic orthoborate salts for lithium batteries

Novel chain polymers comprising weakly basic anionic moieties chemically bound into a polyether backbone at controllable anionic separations are presented. Preferred polymers comprise orthoborate anions capped with dibasic acid residues, preferably oxalato or malonato acid residues. The conductivity of these polymers is found to be high relative to that of most conventional salt-in-polymer electrolytes. The conductivity at high temperatures and wide electrochemical window make these materials especially suitable as electrolytes for rechargeable lithium batteries.

Conductive polymeric compositions for lithium batteries

The use of lithium bis(oxalate)borate (LiBOB) as an additive in a lithium secondary battery provides improved battery performance such as long life and high capacity retention after high temperature storage.

Non-aqueous electrolytic solution

The use of at least two electrolyte salts in a lithium secondary battery provides improved battery performance such as long cycle life of high discharge capacity and high capacity retention.

Non-aqueous electrolytic solution with mixed salts

Novel conductive polyanionic polymers and methods for their preparion are provided. The polyanionic polymers comprise repeating units of weakly-coordinating anionic groups chemically linked to polymer chains. The polymer chains in turn comprise repeating spacer groups. Spacer groups can be chosen to be of length and structure to impart desired electrochemical and physical properties to the polymers. Preferred embodiments are prepared from precursor polymers comprising the Lewis acid borate tri-coordinated to a selected ligand and repeating spacer groups to form repeating polymer chain units. These precursor polymers are reacted with a chosen Lewis base to form a polyanionic polymer comprising weakly coordinating anionic groups spaced at chosen intervals along the polymer chain. The polyanionic polymers exhibit high conductivity and physical properties which make them suitable as solid polymeric electrolytes in lithium batteries, especially secondary lithium batteries.

Growing community of inventors

Broadview Heights, OH, United States of America

Wu Xu