| Carbon aerogels have many merits, such as high surface areas, abundant pore structures especially open hole structures and low densities. What’s more, the organizational structure of carbon aerogels have excellent stability, which make carbon aerogels have great potential applied in catalyst and catalyst support. Meanwhile, the carbon aerogels have high conductivity, low internal resistance and good corrosion resistant ability. These advantages make carbon aerogels suitable applied in lithium ion battery cathode materials.Sodium alginate is a natural macromolecular polysaccharide polymer, extracted from brown seaweeds. A particularly advantageous characteristic of alginate solutions is their capacity to form hydrogels in the presence of divalent cations. We can obtain aerogels aftert the hydrogels dehydrate via a freeze-drying process. This method we make aerogels is simple and environmental friendly. The carbon aerogels obtained from carbonization of aerogels can be used in adsorption, cathode catalysts of fuel cell and lithium ion battery cathode materials.In this work, we have used sodium alginate(SA) as precursors and done the following three part research:(1) Aerogels with low densities were successfully prepared by useing SA as precersors and its adsorption capacity to organic solvents were tested. Results show that carbon aerogels we made have excellent adsorption property.(2) Hydrogels rich in metal ions were prepared by useing SA and graphene as raw materials and introduing Co, C u, N i metal precersors, aerogels was obtained by dehydrated them via a freeze-drying process. Finally, after calcined in NH3 atmosphere, N-doped carbon aerogels was obtained. We used electrochemical workstation testing its catalytic performance as cathode catalysts of fuel cel.(3) Carbon aerogels were dealed with the KOH chemical activation. We used electrochemical workstation and Land system testing the performance of above materials applied in lithium ion battery cathode materials.
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