| abstract |
The invention discloses a method for continuously preparing porous carbon/Fe 3 O 4 by carbonization, activation and oxidation, using non-polluting and low-cost solid powder carbon source (lignin or coal tar pitch, etc.) and K 2 FeO 4 as raw materials, The internal continuous carbonization and activation oxidation is easy to operate. The mass fraction of Fe 3 O 4 in porous carbon/Fe 3 O 4 is 60~80%, which effectively increases the porosity and specific surface area of porous carbon, and is used for electrochemical energy storage. good energy storage performance. As a supercapacitor electrode, its specific capacity reaches 98-366 F/g, and as a lithium-ion battery negative electrode, its specific capacity reaches 740-1020 mAh/g. The invention increases the added value of raw materials such as lignin or coal tar pitch, reduces the manufacturing cost of porous carbon/Fe 3 O 4 composite materials, reduces the environmental pollution caused by alkaline activators, and can realize low cost, green and industrial grade Advantages of large-scale production. |