Study on preparation of activated carbon with corn stalk for lithium-sulfur batteries
ZHANG Sheng-li
LI Dan-dan
SONG Yan-hua
SI Dan-ya
Abstract：Activated carbon was synthesized by using cheap corn stalk as carbon source and ZnCl2 as acti-vator by microwave assisted.Then sulfur-carbon composite materials was synthesized with elemental sulfur by using melting method.The composite was analyzed by surface area and porosity analyzer XRD,FESEM for structure and morphology,and cyclic voltammetry (CV)and charge-discharge curve for electrochemical properties.Results showed that the activated carbon had specific surface area of 1 042.2 m2 /g and the total entrance of 0.76 cm3 /g.There were pores of different specifications distributed in internal acticated carbon and a large number of pores on activated carbon surface.The sulfur-carbon composite materials were tested when current density at 400 mA /g and scope of charge-discharge in 1.5 ~3 V,its initial specific discharge capacity was 608.4 mAh /g,and capacity retention was 60% after 100 times,showing good electrochemical performance.
Keywords：Li-S batteryS /C composite materialsactivated carbonZnCl2 chemical activation methodcorn stalk
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )