8results about How to "Increased Diffusion Channel" patented technology

The application relates to the technical field of battery materials. Disclosed are a lithium nickel-manganese acid positive electrode material, a preparation method thereof, a positive electrode and a battery. The lithium nickel-manganese acid positive electrode material comprises a base material and a first coating layer and a second coating layer successively coated on the surface of the base material; the chemical general formula of the base material is Li(Li a Ni b Mn c Fe d Sb e )O 4‑x , wherein a+b+c+d+e=2, 0<=x<=0.2, 0<=a<=0.1, 0.4<=b<=0.5, 1<=c<=1.5, 0.1<=d+e<=0.4; the first coating layer comprises NbTi(PO4)3, and the mass ratio of the first coating layer to the base material is 0.1-5:100; the second coating layer comprises a carbon material, and the mass ratio of the second coating layer to the base material is 0.1-5:100. The lithium nickel-manganese acid positive electrode material provided by the embodiment of the application has excellent electrochemical performance.

The utility model provides a heat dissipation module, a heat dissipation device and a heat dissipation system, the heat dissipation module comprises a plate body and a plurality of fins, the plate body is internally provided with a first cavity, the fins are internally provided with second cavities, the plurality of fins are arranged, the second cavities of the plurality of fins are communicated with the first cavity to form a phase change cooling cavity, and in addition, the second cavities of the plurality of fins are communicated with the first cavity to form a phase change cooling cavity. The phase-change cooling cavity comprises a first cavity and a second cavity, the area, in the second cavity, of the gaseous phase-change working medium converted into the liquid phase-change working medium is a phase-change area, the multiple fins are arranged, and the phase-change areas of the adjacent fins are communicated through communicating pipes. Therefore, the gaseous phase change working medium in the phase change cooling cavity can be concentrated in the fins corresponding to the high-temperature area, the heat dissipation capability of the fins in the heat dissipation module is fully utilized, and the heat dissipation efficiency of the heat dissipation module can be improved.

This invention provides a lithium titanium dioxide sodium phosphate anode material and an aqueous lithium-iodine battery based thereon, belonging to the field of secondary battery technology. The chemical formula of the lithium titanium dioxide sodium phosphate anode material is Li. x Na y Ti2(PO4)3, where 0

The invention discloses a lithium iron phosphate positive electrode material, a preparation method thereof and a battery, and belongs to the technical field of batteries, the preparation method comprises the following steps: mixing an iron source, a lithium source, a phosphorus source, a dopant and a grinding agent, and carrying out dry ball milling to obtain precursor powder; and sintering the precursor powder under the protection of inert gas to obtain the lithium iron phosphate positive electrode material. According to the method, high-purity graphite / acetylene black is used as a grinding agent and a carbon source, a doping agent is added at the same time, a solvent does not need to be used, a ball-milled material does not need to be dried, uniform compounding of a precursor and construction of a conductive network are achieved in one step through the mechanochemical effect, and then the conductive network is obtained through high-temperature sintering. The prepared lithium iron phosphate positive electrode material has excellent electrochemical performance and relatively high compaction density, and still keeps relatively good electrochemical performance in a low-temperature environment, so that a new development direction is provided for production of lithium iron phosphate.

The application provides a modified ternary positive electrode material and a preparation method and application thereof. The modified ternary positive electrode material comprises a ternary positive electrode material matrix and a coating layer. The coating layer comprises a first coating layer existing on the surface of the ternary positive electrode material matrix and a second coating layer existing on the surface of the first coating layer. The first coating layer comprises Al2O3. The second coating layer comprises Li3AlF6 and LiF. The modified ternary positive electrode material provided by the application has high specific capacity, excellent cycle stability and excellent rate performance by doping boron elements in the matrix phase and constructing a specific double-layer coating layer on the surface of the matrix.

This invention belongs to the technical field of comprehensive utilization of phosphorus iron slag and lepidolite, specifically disclosing a rubidium- and cesium-doped lithium iron phosphate material, its preparation method, and its application. The rubidium- and cesium-doped lithium iron phosphate cathode material provided by this invention has a Li, Rb, and Cs mass ratio of 4:(0.3~0.9):(0~0.6). Specifically, lepidolite powder is roasted with concentrated sulfuric acid to obtain roasted slag, which is then treated with water to obtain a lithium-containing solution. Finally, the lithium-containing solution is mixed with phosphorus iron slag and subjected to a hydrothermal reaction to prepare the lithium iron phosphate material. This invention innovatively demonstrates that under hydrothermal reaction conditions, the lithium extraction solution from lepidolite can react with phosphorus iron slag in situ to generate rubidium- and cesium-doped lithium iron phosphate, improving the recycling performance of lithium iron phosphate and achieving high-value utilization of waste residue.

The application provides a lithium nickel manganese oxide positive electrode material and a preparation method and application thereof. The lithium nickel manganese oxide positive electrode material comprises an inner core and a cation and anion co-coating layer arranged on the surface of the inner core, and a phase of the lithium nickel manganese oxide positive electrode material comprises a spinel phase and a layered phase. The lithium nickel manganese oxide positive electrode material contains the spinel phase and the layered phase, the spinel phase and the layered phase have very good compatibility, the diffusion channel of Li is increased, and the lithium nickel manganese oxide positive electrode material has good rate performance and maintains high capacity.

The invention provides a composite positive electrode material and a preparation method thereof, a positive plate and a lithium ion battery. The composite positive electrode material comprises a LiMnxFe1-x-a-bLaaCebPO4 core, and a Zr1-cZncPO4 layer and a carbon layer which are coated on the surface of the LiMnxFe1-x-a-bLaaCebPO4 core in sequence from inside to outside, 0.5 < = x < = 0.7, 0.005 < = a < = 0.03, 0.005 < = b < = 0.02, and 0.08 < = c < = 0.12. In the composite positive electrode material, La < 3 + > occupies the site of Li < + >, so that the diffusion speed of lithium ions is increased; ce < 3 + > dynamically eliminates lattice oxygen vacancies through a variable valence effect, so that the manganese dissolution activation energy is improved, and the dissolution of manganese ions is reduced. And the Zr1-cZncPO4 layer can block the migration path of Mn < 2 + >, so that the dissolution of manganese ions is further reduced.