Synthesis And Properties Of Porous Carbon Composite Materials Drived From Metal-organic Framework

In recent years,due to the global demand for clean and sustainable energy,energy storage technologies such as rechargeable batteries for electric vehicles,portable electronic products and large-scale energy storage have attracted widespread attention.Rechargeable lithium-ion batteries(LIBs)dominate portable electronics are considered the preferred source of energy for electric vehicles.At present,graphite serves as the most popular and practical anode for commercial LIB because it has the advantages of superior chemical stability and electrical conductivity.But the theoretical capacity of graphite is low(372 mAh g-1),which severely limits its applications.So researchers are actively studying new types of carbon and carbon composites.As a new class of crystalline materials,MOFs are used as precursors or templates to prepare electrode materials,such as porous metal oxides,metal sulfides,carbon or metal oxide/C composite materials through the calcination of pristine MOFs.Among these electrode materials have shown good electrochemical performances due to their high surface area and porosity of MOF precursors.In this paper,choose IRMOF-3 and MOF-14 respectively,and citric acid(CA)was used as regulator to fabricating hierarchically porous MOF(HP-MOF).The effects of different CA dosage on the size and quantity of mesoporous were discussed.HP-MOFs are used as precursors and templates to synthesized amorphous carbon.The IRMOF-3 was calcined in Ar at 800/900/1000?,and then the honeycomb structure was obtained by acid etching.The effects of different calcining temperatures on the performance of lithium ion batteries were further studied.CuO@C composite material was synthesized by calcining MOF-14,which was used for anode of LIB and showed high cycle performance.