Inorganic Chemicals Industry >
Study on preparation and electrochemical performance of S/MCNT/Fe3O4 cathode materials
Received date: 2021-08-18
Online published: 2022-06-22
Lithium?sulfur battery has attracted extensive attention from researchers due to the high theoretical energy density，but the actual energy density is still limited by the low conductivity of sulfur and the shuttle effect of the intermediate polysulfides，etc.To solve these issues，herein sulfur was loaded onto multi?walled carbon nanotube with the porous framework formed through sulfur melting method，followed by compounding it with the polar oxide ferroferric oxide via grinding method to finally obtain the as?prepared sulfur/multi?walled carbon nanotube/ferroferric oxide（S/MCNT/Fe3O4） cathode materials.The lithium sulfur battery assembled based on this cathode material had an initial discharge specific capacity of up to 908.6 mA·h/g at 1C rate.After 250 cycles，the capacity decay rate per cycle was 0.2% and the average coulomb efficiency was about 99%.When the current density was increased to 3C，it still had a capacity of 636.5 mA·h/g，exhibiting excellent rate performance.
Zhixu QIU , Shaokuan ZHU , Yuxiao WEI , Jiaying LONG , Dongchuang HUANG , Jiaojing SHAO . Study on preparation and electrochemical performance of S/MCNT/Fe3O4 cathode materials[J]. Inorganic Chemicals Industry, 2022 , 54(6) : 73 -77 . DOI: 10.19964/j.issn.1006-4990.2021-0498
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