49results about How to "Improve ionic conductance" patented technology

In a spray pyrolysis manufacturing method of an all-solid-state film lithium ion battery, a double-layer film structure is formed by depositing an anode material and a solid electrolyte together, and two layers of precursor solutions are sprayed simultaneously at a junction part of a anode solid electrolyte layer and a cathode layer by a double spray gun so as to form a buffer layer. The invention is characterized in that an interface layer between films is reduced; not only the battery resistance is reduced, but also the ionic conductivity of the anode material is increased; in the buffer layer between two deposition layers, the component contents of the two layers change gradually; the component content of the lower layer decreases gradually, and the component content of the upper layer increases gradually. Therefore, tight combination of the upper and the lower layers is formed; the compatibility of the upper and the lower layers is improved; the stress and crystal boundary are decreased; and the interfacial conductivity is increased; the conductivity of the whole all-solid-state film battery is greatly improved, and the stability and cycling performance of the battery are improved.

The invention provides a lithium cobalt oxide positive electrode material coated with a tin compound on the surface, and the positive electrode material can be prepared by a dry method or a wet method. The coating layer effectively reduces the direct contact between lithium cobaltate particles and the electrolyte, reduces the occurrence of side reactions and the dissolution of cobalt in the electrolyte, and improves the utilization rate of the positive electrode material during the cycle, thereby effectively improving Cycling stability and Coulombic efficiency of lithium cobalt oxide cathode.

The invention provides a method for preparing a kind of single-crystal high-nickel multi-component material, which is characterized in that it comprises the following steps: preparing a quasi-single-crystal high-nickel positive electrode precursor: adding additive A to the reaction kettle bottom liquid in a nitrogen protective atmosphere; A mixed solution of nickel-cobalt-manganese ternary salt solution and additive B is added into the reactor, wherein the molar ratio of Ni, Co, and Mn in the nickel-cobalt-manganese ternary salt solution is 1-a-b:a:b, 1>1 ‑a‑b≥0.6, 0.4≥a≥0, 1≥b>0, the mass ratio of nickel-cobalt-manganese ternary salt solution to additive B is 1:(0.01%‑0.1%), controlled by alkaline solution containing ammonia pH value for co-precipitation reaction. The preparation method of the quasi-single-crystal type high-nickel multi-element material of the present invention prepares a kind of quasi-single-crystal high-nickel multi-element material that can be formed by roasting at low temperature. surface nickel content.

An all-solid-state lithium thin film that deposits the positive electrode material and the solid electrolyte together to form a double-layer film structure and uses a double spray gun to simultaneously spray the precursor solution of the two layers at the junction of the positive electrode solid electrolyte layer and the negative electrode layer to form a buffer layer. Ion battery spray pyrolysis manufacturing method. It is characterized in that the interface between one layer of film is reduced, the battery resistance is reduced and the ionic conductivity of the positive electrode material is improved at the same time; at the same time, the content of the two layers of components in the buffer layer between the two deposition layers is gradually changing, and the composition of the lower layer The content of the component gradually decreases, while the content of the upper component gradually increases. Thus forming a tight combination of the upper and lower layers, increasing the matching of the upper and lower layers, reducing stress and grain boundaries, and improving the conductance of the interface; thus greatly improving the conductance of the entire all-solid-state thin film battery, improving the stability and cycle performance of the battery.