Application of copper oxide

Copper oxide as an important semiconductor material, due to its unique properties, such as good thermal stability and photochemical stability, high temperature superconductivity, high electrochemical activity, non-toxic, cheap preparation method, has been widely used in catalysts, superconducting materials, thermoelectric materials, sensing materials, glass, ceramics, lithium ion batteries and other fields. At present, the controllable preparation of nanomaterials has become a goal of materials researchers because of the superior optical, electrical, magnetic and thermal properties of nanomaterials with different morphologies.
As the most common transition metal oxide, copper oxide has the advantages of high theoretical specific capacity (674mAh·g-1), simple preparation and low cost, and has been gradually applied to lithium-ion batteries. In order to improve the conductivity of the electrode when CuO is used as the negative electrode material of the battery, limiting the volume change of carbon active substances in the process of battery charging and discharging. The electrochemical performance of the battery such as reversible capacity, cycle life and charge-discharge stability can be improved.
A carbon core/copper oxide shell composite electrode for lithium-ion battery is presented. The core is carbon fiber and the shell is copper oxide thin layer. The thin layer of copper oxide has an array of nano-needle structure and nano-pore structure. The nanometer needle structure is on the outer surface of the thin layer of copper oxide, and the nanometer pore structure is the hole through the thin layer of copper oxide.
In the composite electrode, the nanoporous structure of thin copper oxide layer is conducive to the easy passage of lithium ions in the electrolyte, and then the process of lithium insertion and delithium occurs in the carbon core, thereby increasing the charge and discharge capacity of the lithium-ion battery. The carbon core is in close contact with the copper oxide shell, which not only improves the conductivity of the electrode, but also cushions the volume change in the copper oxide conversion process. Copper oxide housing tightly packed
The nanoneedle structure covered with carbon core and copper oxide shell greatly reduces the diffusion distance of lithium ions and increases the effective contact area between lithium ions and lithium ions, limiting the expansion of carbon fiber volume during the process of lithium insertion and delithium of lithium ion battery, which is conducive to improving the reversible capacity and cycle life of lithium ion battery.