2results about How to "Lower initial resistance" patented technology

The present invention relates to a positive electrode active material containing a lithium transition metal oxide having a nickel content of 70 mol% or more with respect to all metals other than lithium, in which EELS analysis results of particle surfaces satisfy relational expression 1.

The application relates to a preparation method of a low-temperature-resistant cable and relates to the technical field of cable preparation. The low-temperature-resistant cable is prepared by adopting copper, manganese, nickel, cobalt, zinc, tin, titanium and graphite powder as a conductor prepared by depositing a nano-silver film on the surface of alloy micro wires, twisting the conductor according to requirements to obtain a core, mixing hydrogenated nitrile rubber, boron nitride nanosheets, refined paraffin, 4-hydroxycyclohexyl trimethoxysilane, ammonium polyphosphate, silicone oil and methyl methacrylate to prepare an insulation protective sleeve, and wrapping the core to obtain the low-temperature-resistant cable which can be applied to an intelligent power distribution system under extremely cold conditions. In the application, the initial resistance of the conductor under low temperature is reduced by optimizing the conductor, the NTC effect is effectively started, the heat conduction performance of the insulation protective sleeve is adjusted, the low-temperature brittle stop time of the cable under extremely cold conditions is reduced, the high-temperature stable temperature of the cable is reduced, the low-temperature brittleness and high-temperature aging of the cable insulation protective sleeve are effectively inhibited, and the working life of the cable in the intelligent power distribution system is prolonged.