63 results about "Lithium peroxide" patented technology

Provided is a lithium-air battery comprising: a positive electrode including a current collector and a positive electrode active material layer which is located on the current collector and includes a positive electrode active material; a negative electrode including a negative electrode active material; and an electrolyte, wherein the positive electrode active material includes lithium peroxide (Li2O2), lithium oxide (Li2O), lithium hydroxide (LiOH), or a combination thereof, and the negative electrode active material includes a lithium alloy, a material which can be doped or undoped with lithium, a transitional metal oxide, or a combination thereof.

An electrochemical energy store including at least one anode and at least one cathode in an electrolyte, lithium peroxide being generated at the cathode by the reaction of lithium ions with oxygen. The cathode is connected to an oxygen reservoir.

The invention discloses a carbon-supported noble metal oxide bifunctional catalyst and a preparation method and application thereof. The chemical expression of the carbon-supported noble metal oxide bifunctional catalyst is RuO<2> / CoMnO<x>@CNT; wherein Co is present in the form of Co<3>O<4>, Mn is present in the form of MnO<2>, and the content of Ru therein is 12 to 14% by weight. Through the invention, the problem that the cycle life of the lithium-oxygen battery is low caused by the unicity of the structural function of the cathode catalyst of the lithium-oxygen battery and the problems of poor charging and discharging efficiency, severe electrode polarization and bad cycle performance caused by incomplete deposition and decomposition of lithium peroxide in the prior art are solved.

The invention discloses a method for preparing a single-crystal ternary positive-electrode material, belonging to the technical field of lithium ion batteries. The method comprises the following steps: subjecting lithium oxide and the oxides of nickel, cobalt and manganese in a certain ratio to mixing and ball milling; performing primary sintering on a ball-milled material at 400-600 DEG C; carrying out secondary sintering on a product obtained after primary sintering at 650-780 DEG C; and finally, performing natural cooling to room temperature so as to obtain the single-crystal ternary positive-electrode material. The method of the invention directly adopts the oxides as raw materials and avoids the phenomenon of gas generation when hydroxides or carbonate compounds are used as raw materials, so the consistency of an atmosphere, the stability of heat and structural cracking are greatly improved; through direct mixing of the lithium oxide with the oxides of nickel, cobalt and manganese, uniform mixing is realized, the particle size of a sintering raw material is small, and all the elements are uniformly mixed, so a condition for forming a single crystal at a lower temperature is provided.

The invention relates to a lithium-oxygen battery electrolyte using molybdenum pentachloride as redox medium and preparation and application thereof. The electrolyte includes soluble lithium salt as solute, proton-free solvent and additive molybdenum pentachloride. The concentration of solute in the electrolyte is 0.1- 1 mol / L. The concentration of molybdenum pentachloride in electrolyte is 0.01-0.1 mol / L. As that molybdenum pentachloride is use as an electrolyte additive in the lithium oxygen battery, the invention facilitates the formation of the cyclic lithium peroxide dure the discharge process, and also plays the role of stabilizing the carbon electrode. Lithium peroxide discharge products can be effectively decomposed in the charging process, and the cycle life and reversibility ofthe battery can be improved by decreasing the charging voltage. At the same time molybdenum pentachloride is stable in the battery system and no side reaction occurs. The invention has the advantagesof low cost, easy access, high efficiency and convenience.

The invention discloses a preparation method of a rock salt type lithium ion battery cathode material. The preparation method comprises following steps: (1) evenly mixing a lithium source, a high-valence manganese source, and a low-valence manganese source, burning the mixture in an inert atmosphere, cooling the mixture in a furnace, and grinding the mixture to obtain a LiMnO2 precursor; and (2) evenly mixing the LiMnO2 precursor obtained in the step (1) with lithium peroxide, grinding, burning the mixture in an inert atmosphere, carrying out an annealing treatment, and cooling the mixture ina furnace to obtain the rock salt type lithium ion battery cathode material (Li4Mn2O5). The invention also provides a rock salt type lithium ion battery cathode material and applications thereof. Theprovided rock salt type lithium ion battery cathode material (Li4Mn2O5) has a pure phase rock salt structure, does not contain any purity phase, and has excellent electrochemical properties.

The invention discloses an unsymmetrical lithia battery. The battery takes lithium peroxide as a positive pole active material, lithium peroxide and a catalyst which are uniformly mixed are loaded on a porous carbon material so as to form a positive pole, the material capable of realizing deintercalation of lithium ions is taken a negative pole, and the weight content of lithium peroxide is 1-50% in a composite material. According to the invention, the discharging product lithium peroxide of the traditional lithia battery is directly used as the positive pole active material, the pole material of the traditional lithium ion battery, which is capable of realizing deintercalation of lithium ions, is taken as the negative pole, the damage of negative pole lithium dendrites of a lithia battery to the battery is solved, and meanwhile, the controllable distribution of the discharging product is realized, an unblocked oxygen diffusion channel is guaranteed, and the charge-discharge capacity and cycle performance of the lithia battery are effectively improved.

The invention relates to a lithium-oxygen battery and a preparation method thereof. The lithium-oxygen battery comprises a shell, a positive pole, a negative pole, a separator located between the positive pole and the negative pole, a positive terminal connected with the positive pole and led out of the shell as well as a negative terminal connected with the negative pole and led out of the shell,wherein the positive pole and the negative pole are arranged in the shell; the positive pole comprises a gas diffusion layer allowing oxygen to pass and a lithium peroxide loading layer which is located between the gas diffusion layer and the separator; the lithium-oxygen battery further comprises a gas chamber for storing oxygen, and the gas chamber is formed in the side, opposite to the side where the lithium peroxide loading layer is located, of the gas diffusion layer and communicated with the gas diffusion layer; the negative pole is a collector electrode formed by copper, a copper-zincalloy, nickel, a nickel-zinc alloy or a nickel-copper alloy; the lithium-oxygen battery further comprises an electrolyte filling space between the positive pole and the negative pole and in the separator. The lithium-oxygen battery is high in specific energy, high in charge-discharge cycle performance and low in cost, facilitates large scale production and has broad application prospect in the energy-storage aspects of electric tools, electric vehicles, power grids and the like.

Disclosed herein are electrolyte formulations containing methoxybenzene (also known as anisole or phenoxymethane) for use in lithium-air semi-fuel cells. Lithium-air semi-fuel cells contain a metallic lithium anode and an air (oxygen) fuel cell type porous carbon cathode. The reaction product in the cathode is lithium oxide (Li2O) and / or lithium peroxide (Li2O2). This reaction product is sparingly soluble in common lithium-air cell solvents, and therefore the cathode pores become blocked over time, leading to cell end-of-life. Methoxybenzene is an organic solvent that demonstrates an increased solubility of Li2O, which minimizes the clogging of the cathode. Lithium-air semi-fuel cells with electrolytes containing methoxybenzene demonstrate higher discharge capacities per the same weight, than the cells having electrolytes without methoxybenzene. Higher energy density semi-fuel cells are thus achieved.

A method for making a lithium ionic energy storage element, the method includes the steps of: (a) mixing a lithium ion donor, a positive electrode frame active substance and a binder with a predetermined weight ratio to form a mixture, and adding the mixture into a dispersant to form a positive electrode active substance, wherein the lithium ion donor includes lithium peroxide, lithium oxide or a combination thereof; (b) coating the positive electrode active substance on an aluminum foil to form a film, and baking the film to form a positive electrode; and (c) forming a lithium ionic energy storage element by assembling the positive electrode, a negative electrode having a negative electrode active substance and a porous separate strip interposed between the positive electrode and the negative electrode, and filling an electrolyte into the porous separate strip.