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Since the research group of Cheng Huiming of Shenyang National (Joint) Laboratory of Materials Science, Institute of Metal Research, Chinese Academy of Sciences, discovered that graphene can be used as a protective and conductive layer for sulfur electrodes and battery separators, new progress
has been made in the research of graphene lithium-sulfur batteries.
In recent years, the advanced material and interface physics research team led by Professor Wang Rongming of the School of Mathematics and Physics of University of Science and Technology Beijing has carried out a series of research work
in the field of interface structure regulation, characterization and characterization of substances.
Dr.
Yu Mingpeng, a young teacher of the team, and Professor Qiu Hong and others found in the cathode material of the new graphene-based lithium-sulfur battery that the lithium-sulfur battery has the advantages of high theoretical energy density (2600 Wh/kg), low price and environmental friendliness of elemental sulfur, but how to improve the utilization rate of sulfur of active substances and improve cycle stability has become a major problem at present, which has also attracted extensive attention
from the scientific community.
In view of the above problems, Dr.
Yu Mingpeng and his collaborators used melt-diffusion method to obtain carbon-sulfur composites on the basis of the preparation of N-doped graphene, and further regulated
the carbon-sulfur system interface by atomic layer deposition (ALD).
The N-doped graphene obtained has the advantages of high pyridine and pyrrole nitrogen content, large specific surface area and rich pore structure, which greatly improves the surface chemical activity
of graphene materials.
Carbon-sulfur composites can effectively bind the polysulfur ions generated during the charging and discharging process through physical adsorption of carbon materials and N-doped chemical adsorption, and ALD modification can further play an in-situ adsorption and shielding role, thereby effectively suppressing the "shuttle effect" in the charging and discharging process, and finally obtaining excellent electrochemical performance
.
The authors also conduct in-depth research
on the binding capacity of oxides to polysulfide ions through theoretical calculations.
This research work has been accepted and published
by the top international academic journal "Energy and Environmental Science" in this field.
It is another important achievement
since the team published a paper in the Nature series of journals and Professor Chen Di's team has made new progress in the field of new energy.
Since the research group of Cheng Huiming of Shenyang National (Joint) Laboratory of Materials Science, Institute of Metal Research, Chinese Academy of Sciences, discovered that graphene can be used as a protective and conductive layer for sulfur electrodes and battery separators, new progress
has been made in the research of graphene lithium-sulfur batteries.
In recent years, the advanced material and interface physics research team led by Professor Wang Rongming of the School of Mathematics and Physics of University of Science and Technology Beijing has carried out a series of research work
in the field of interface structure regulation, characterization and characterization of substances.
Dr.
Yu Mingpeng, a young teacher of the team, and Professor Qiu Hong and others found in the cathode material of the new graphene-based lithium-sulfur battery that the lithium-sulfur battery has the advantages of high theoretical energy density (2600 Wh/kg), low price and environmental friendliness of elemental sulfur, but how to improve the utilization rate of sulfur of active substances and improve cycle stability has become a major problem at present, which has also attracted extensive attention
from the scientific community.
In view of the above problems, Dr.
Yu Mingpeng and his collaborators used melt-diffusion method to obtain carbon-sulfur composites on the basis of the preparation of N-doped graphene, and further regulated
the carbon-sulfur system interface by atomic layer deposition (ALD).
The N-doped graphene obtained has the advantages of high pyridine and pyrrole nitrogen content, large specific surface area and rich pore structure, which greatly improves the surface chemical activity
of graphene materials.
Carbon-sulfur composites can effectively bind the polysulfur ions generated during the charging and discharging process through physical adsorption of carbon materials and N-doped chemical adsorption, and ALD modification can further play an in-situ adsorption and shielding role, thereby effectively suppressing the "shuttle effect" in the charging and discharging process, and finally obtaining excellent electrochemical performance
.
The authors also conduct in-depth research
on the binding capacity of oxides to polysulfide ions through theoretical calculations.
This research work has been accepted and published
by the top international academic journal "Energy and Environmental Science" in this field.
It is another important achievement
since the team published a paper in the Nature series of journals and Professor Chen Di's team has made new progress in the field of new energy.
