Fe3C/Fe nanoparticles embedded in N-doped porous carbon nanosheets and graphene: A thin functional interlayer for PP separator to boost performance of Li-S batteries

Wang, Shanxing; Liu, Xinye; Duan, Huanhuan; Deng, Yuanfu; Chen, Guohua

doi:10.1016/j.cej.2021.129001

Cited by 54 publications

(25 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A separator is a key component that serves the dual purpose of preventing internal short circuits while enabling lithium ions to pass through the battery. In addition, the modified separator could effectively hinder the shuttle effect while maintaining the load of active materials. ,, Various materials, such as carbon materials via heteroatom doping, − transition metal sulfides (MoS 2 , VS 4 ), nitrides (MoN, WN 0.67 ), metal carbides (Mo 2 C), and oxides, , have been developed to functionalize the separator of the cathode-facing side. Recently, scientists have found some correlations between adsorption and catalysis in Li–S batteries.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Adsorption-Electrocatalysis of Mo–MoB Heterostructures for Lithium–Sulfur Batteries

Guo

Zhao

Miao

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Because of the high theoretical capacity of lithium–sulfur (Li–S) batteries and the relatively low cost of sulfur, these batteries have been regarded as one of the most promising types of energy storage systems. The severe shuttle effect of the polysulfide deteriorates the cycle stability, and the inferior conductivity of the sulfur and polysulfide also lead to sluggish electrochemical kinetics. Herein, we use a facile molten salt method to synthesize the heterostructure Mo–MoB, which is coated on a commercial PP separator for the Li–S batteries. Experimental analysis and theoretical calculation results show that the heterostructure Mo–MoB can serve as a physical barrier and chemical absorbent to hinder the shuttle effect, as well as be a bidirectional catalyst to simultaneously accelerate the conversion of polysulfides into Li2S and decomposition of Li2S with the synergistically catalytic effect of Mo and MoB. Consequently, the cell with the heterostructure Mo–MoB-modified separator demonstrates superior cycle performance (capacity fading rate of ∼0.07% per cycle during 300 cycles at 0.5 C) as well as increased rate capability (670 mAh g–1 at 2 C). This work indicates that heterostructure metal borides could be adsorption-catalysis material to functionalize the separator, which can be a new strategy to design the high-performance Li–S batteries.

show abstract

Section: Introductionmentioning

confidence: 99%

Synergistic Adsorption-Electrocatalysis of Mo–MoB Heterostructures for Lithium–Sulfur Batteries

Guo

Zhao

Miao

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…Recently, introducing electrocatalysts in sulfur host materials has been deemed as an efficient way to realize the high-areal-capacity lithium–sulfur batteries owing to strong chemical interaction and accelerated redox reactions with LiPSs. , For example, metal nitrides (VN and Co 4 N), , metal phosphides (Ni 2 P and Cu 3 P), , metal carbide, metal-free media (BP, BN), , and carbon doped with a high level of nitrogen were proved to have high electrocatalytic activity and have been widely developed. It has also been reported that the polar Fe–C and Fe–N components have strong chemisorption and catalytic properties for sulfur. − Therefore, it is necessary to seek a multifunctional sulfur host containing high-efficiency catalysts to realize effective anchoring conversion of LiPSs and finally obtain high-energy-density Li–S batteries. In a general way, an ideal high-efficiency catalyst should combine the merits of numerous catalytic sites and high conductivity to enhance the catalytic activity according to the basic principles of catalyst design.…”

Section: Introductionmentioning

confidence: 99%

Embedding Fe₃C and Fe₃N on a Nitrogen-Doped Carbon Nanotube as a Catalytic and Anchoring Center for a High-Areal-Capacity Li–S Battery

Zhu

Sha

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The biggest obstacles of putting lithium−sulfur batteries into practice are the sluggish redox kinetics of polysulfides and serious "shuttle effect" under high sulfur mass loading and lean-electrolyte conditions. Herein, Fe 3 C/Fe 3 N@nitrogen-doped carbon nanotubes (NCNTs) as multifunctional sulfur hosts are designed to realize high-areal-capacity Li−S batteries. The Fe 3 N and Fe 3 C particles attached to NCNT can promote the conversion of polysulfides. Besides, NCNT can not only enhance the chemisorption of polysulfides but also increase the special surface area and electrical conductivity by constructing a three-dimensional skeleton network. Integrating the merits of high electrical conductivity, high catalytic activity, and strong chemical binding interaction with lithium polysulfides (LiPSs) to achieve in situ anchoring conversion, the Fe 3 C/Fe 3 N@NCNT multifunctional hosts realize high sulfur mass loading and accelerate redox kinetics. The novel Fe 3 C/Fe 3 N@NCNT/S composite cathode exhibits steady cycle ability and a high areal capacity of 9.10 mAh cm −2 with a sulfur loading of 13.12 mg cm −2 at 2.20 mA cm −2 after 50 cycles.

show abstract

“…39,40 Polar oxygen-containing compounds have solitary electron pairs in the O atom, which results in high binding energies between metal oxides and polysulfides. 41,42 Metal sulfides, 43,44 metal selenides, 45,46 metal nitrides, 47,48 metal phosphides, 49,50 and metal carbides 51,52 can provide an effective catalytic effect on the conversion of polysulfides. Metal borides possess lightweight density, thus, they maintain the high energy density of Li−S batteries.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

Wang

et al. 2022

ACS Nano

165

View full text Add to dashboard Cite

Because of their high energy density, low cost, and environmental friendliness, lithium−sulfur (Li−S) batteries are one of the potential candidates for the next-generation energy-storage devices. However, they have been troubled by sluggish reaction kinetics for the insoluble Li 2 S product and capacity degradation because of the severe shuttle effect of polysulfides. These problems have been overcome by introducing transition metal compounds (TMCs) as catalysts into the interlayer of modified separator or sulfur host. This review first introduces the mechanism of sulfur redox reactions. The methods for studying TMC catalysts in Li−S batteries are provided. Then, the recent advances of TMCs (such as metal oxides, metal sulfides, metal selenides, metal nitrides, metal phosphides, metal carbides, metal borides, and heterostructures) as catalysts and some helpful design and modulation strategies in Li−S batteries are highlighted and summarized. At last, future opportunities toward TMC catalysts in Li−S batteries are presented.

show abstract

Fe3C/Fe nanoparticles embedded in N-doped porous carbon nanosheets and graphene: A thin functional interlayer for PP separator to boost performance of Li-S batteries

Cited by 54 publications

References 64 publications

Synergistic Adsorption-Electrocatalysis of Mo–MoB Heterostructures for Lithium–Sulfur Batteries

Synergistic Adsorption-Electrocatalysis of Mo–MoB Heterostructures for Lithium–Sulfur Batteries

Embedding Fe₃C and Fe₃N on a Nitrogen-Doped Carbon Nanotube as a Catalytic and Anchoring Center for a High-Areal-Capacity Li–S Battery

Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

Contact Info

Product

Resources

About

Fe3C/Fe nanoparticles embedded in N-doped porous carbon nanosheets and graphene: A thin functional interlayer for PP separator to boost performance of Li-S batteries

Cited by 54 publications

References 64 publications

Synergistic Adsorption-Electrocatalysis of Mo–MoB Heterostructures for Lithium–Sulfur Batteries

Synergistic Adsorption-Electrocatalysis of Mo–MoB Heterostructures for Lithium–Sulfur Batteries

Embedding Fe3C and Fe3N on a Nitrogen-Doped Carbon Nanotube as a Catalytic and Anchoring Center for a High-Areal-Capacity Li–S Battery

Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

Contact Info

Product

Resources

About

Embedding Fe₃C and Fe₃N on a Nitrogen-Doped Carbon Nanotube as a Catalytic and Anchoring Center for a High-Areal-Capacity Li–S Battery