| The requirements for energy and petroleum resources are improving asthe development of society and technology. However, the research on how tosolve the enery problems becomes one of the most important topics becausethe petroleum resources are limited which lead to extremely polution onenvironment when they are used as burn fuels. Nowaday and in the future,researchers are focusing on Lithium-ion bettery, which is called―Greenchemical power‖in many different kinds of powers, due to its superioritiessuch as environmental protection, high capacity, high security, long servicelife and so on. They are devoting themselves to make Sn-based anodematerials with higer specific capacity (990mAh·g-1) instead of C-based to meetdemand. But the biggest barrier in application of Sn-based anode material isthat simple Sn anode materials will appear specific volume swelling incharging and decharging which results in material pulverization andinactivation.In this study, Sn/C nanofibers have been synthesized as anode materialsof rechargeable lithium ion batteries using electrospinning apparatus. The effects about morphology, crystal structure and electrochemical performanceof nanofibers with different Sn contents were investigated by SEM, XRD,DSC, HR-TEM, EDX, TG and electrochemical characterization respectively.The results exhibit that along with Sn content increasing, the diameters andgraphitization degree of fibers were improved with the morphology of simpleSn from amorphous to crytal embeding particles on the fibers. Sn/C nanofiberscarbonized at850℃have better specific capacity (555.1mAh·g-1), rateperformance and structure integrity after charging and discharging when Sncontent is23.7%as anode bettery material. We get the conclusion that thestructure and the Sn content had a―trade-off‖effect to the electrochemicalperformance of Sn/C nanofibers. Comparing with carbonized temperature, wefound Sn/C nanofibers carbonized at700℃have the best electrochemicalperformance (580.3mAh·g-1) and rate performance. |
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