609results about How to "Avoid oxidation reactions" patented technology

The invention provides a lithium ion secondary battery and an electrolyte thereof. The electrolyte of the lithium ion secondary battery comprises lithium salt, a non-aqueous solvent, and an addition agent at least containing 1, 3-propane sultone (PS), fluoroethylene carbonate (FEC) and an s-triazine structural compound, wherein the s-triazine structural compound is represented by a general formula (1), a general formula (2) or a general formula (3); in the general formula (1), the general formula (2) or the general formula (3), n is an integral number of 0-5, and R1, R2 and R3 are hydrogen atoms or C1-C6 alkyl group; and the hydrogen atoms on the alkyl group can be partially or wholly replaced by fluorine atoms. The lithium ion secondary battery comprises a positive plate, a negative plate, a diaphragm arranged between the adjacent positive plate and the negative plate, and the electrolyte of the lithium ion secondary battery. According to the lithium ion secondary battery and the electrolyte thereof provided by the invention, oxidation reaction between the electrolyte and a cathode material can be inhibited, and the cycle performance under the conditions of high temperature and high voltage is improved.

The invention provides a lithium ion secondary battery and electrolyte thereof. The electrolyte of the lithium ion secondary battery comprises lithium salt, a non-aqueous solvent and an additive, wherein the additive at least comprises 1,3-propane sultone (PS) and a sulfone isocyanurate structural compound; the sulfone isocyanurate structural compound is represented by a general formula (1), a general formula (2) or a general formula (3); the general formula (1), the general formula (2) and the general formula (3) are shown as specifications; in the general formula (1), n is a positive integer in the range of 1 to 3; in the general formula (2), n is a positive integer in the range of 1 to 3, R1 is a straight chain or branched chain alkyl from C1 to C6, and hydrogen atoms of the alkyl can be substituted by fluorine atoms partially or completely; and in the general formula (3), n is a positive integer in the range of 1 to 3, R1 and R2 are straight chains or branched chain alkyl from C1 to C6, and hydrogen atoms of the alkyl can be substituted by fluorine atoms partially or completely. The lithium ion secondary battery and the electrolyte thereof can inhibit oxidation reaction between the electrolyte and an anode material so as to improve cycling performance and storage performance under the conditions of high temperature and high pressure.

The present invention provides a non-aqueous electrolyte comprising: a non-aqueous organic solvent; an imide-based lithium salt; and, as an electrolyte additive, at least one additive selected from the group consisting of lithium difluorooxalate phosphate (LiDFOP), trimethylsilylpropyl phosphate (TMSPa), 1,3-propenesultone (PRS), and ethylene sulfate (Esa). The electrolyte additive for a lithium secondary battery of the present invention can suppress the PF6- decomposition of a positive electrode surface, which may occur at the time of high-temperature cycle operation of a lithium secondary battery, and prevent an oxidation reaction of an electrolyte, thereby improving output characteristics at high and low temperatures and suppressing a swelling phenomenon.

The invention provides a lithium-ion battery and an electrolyte thereof. The electrolyte of the lithium-ion battery comprises a lithium salt and a non-aqueous solvent and at least comprises 1,3-propane sultone, fluorinated ethylene carbonate and a pyrimidine-structural compound additive. The lithium-ion battery comprises a positive pole piece, a negative pole piece, a diaphragm spaced between the positive pole piece and the negative pole piece which are adjacent, and an electrolyte, wherein the electrolyte is the electrolyte of the lithium-ion battery provided by the invention. According to the lithium-ion battery and the electrolyte thereof, provided by the invention, the oxidation reaction between the electrolyte and a positive-pole material can be inhibited, so that the cycle performance under the conditions of high temperature and pressure is improved.

The present application relates to an electrolyte and an electrochemical device comprising the same, and an electronic device. The electrolyte comprises one or more nitrile benzoquinone compounds selected from the group consisting of compounds represented by a formula I, a formula II and a formula III, wherein substituents R1-R9 are respectively independently selected from the group consisting ofhydrogen, C2-C12 ether groups, C1-C12 alkoxy groups, halogens, C1-C12 alkyl groups, C2-C12 alkenyl groups, C2-C12 alkynyl groups, and C6-C26 aryl groups. The electrolyte can form a stable protective film on the cathode to effectively improve the cycle capacity retention rate and high-temperature storage performance of the electrochemical device.