4 results about "Cobalt oxide" patented technology

The invention discloses a direct sodium borohydride fuel cell anode. The discharge power of a direct sodium borohydride fuel cell can be substantially increased without using an ionic diaphragm, hydrolysis of borohydride ions can also be effectively inhibited, and therefore the utilization rate of a fuel is increased. The direct sodium borohydride fuel cell anode comprises activated components, carbon black, a bonding agent and an electric collecting conductor, and the activated components include a hydrogen storage alloy and a metallic cobalt oxide. The invention also provides a manufacturingmethod of the direct sodium borohydride fuel cell anode.

The invention relates to a method for preparing metal element-doped cobalt oxide (Co3O4) nanofiber electrodes by an electrostatic spinning method, and belongs to the fields of materials science and engineering technology and chemistry. The method comprises the following steps of preparing a fiber membrane by the electrostatic spinning method, then performing heat treatment on the fiber membrane, and finally preparing doped cobalt oxide (Co3O4) nanofibers. Doped cobalt oxide (Co3O4) nanofibers prepared though the method have finer diameter and ideal catalytic performance. The method has the advantages of simple preparation process, high preparation speed, wide application range and the like.

The invention relates to the technical field of battery materials, and discloses a composite lithium ion battery cathode material, a lithium ion battery cathode, a lithium battery, a battery module, abattery pack and a vehicle. The inner core of the cathode material is a lithium nickel cobalt manganese oxide material; the surface layer is a lithium nickel cobalt oxide material doped with an element E, the content of the element E is in a decreasing trend, a transition layer between the inner core and the surface layer is Li1+mNi1-x-y-zCoxMnyEzO2, 0<=m<=0, 0.01<=x<=0.1, 0.01<=y<=0.1, 0.01<=z<=0.1; and E is at least one of Al, Zr, Ti, Y, Ba and Sr. The structure of the cathode material has good stability, the multiplying power, the cycle performance and the storage performance of the cathode material are remarkably improved compared with those of a traditional lithium nickel cobalt manganese oxide material, and Li/Ni mixed arrangement in the lithium nickel cobalt manganese oxide material can be reduced.