Exploring the Janus structure to improve kinetics in sulfur conversion of Li-S batteries

Gueon, Donghee; Kim, Tae‐Young; Lee, Jungyeon; Moon, Jun Hyuk

doi:10.1016/j.nanoen.2022.106980

Cited by 28 publications

(16 citation statements)

References 47 publications

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Section: Tmcs In Li–s Batteriesmentioning

confidence: 99%

“…In addition, the modulation of catalyst morphological structure could also improve the kinetics of sulfur conversion in Li−S batteries. Moon et al 91 partially deposited the MoO 3 onto spherical particles coalesced by carbon nanotubes (CNT) to obtain the Janus particles (inset of Figure 5c). The strong polarity and large surface area of MoO 3 provided abundant active sites to bind intermediates, thus hindering the shuttling.…”

Section: Tmcs In Li−s Batteriesmentioning

confidence: 99%

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

Wang

et al. 2022

ACS Nano

161

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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.

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Section: Tmcs In Li–s Batteriesmentioning

confidence: 99%

Section: Tmcs In Li−s Batteriesmentioning

confidence: 99%

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

Wang

et al. 2022

ACS Nano

161

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“…Except for this, aqueous electrolytes used in the AZIBs can reduce the cost of large-scale application and deliver the high ionic conductivity (~1 S cm À 1 ), much superior to these batteries (e. g., lithium-ion and sodium-ion battery) based on organic electrolytes. [1][2][3][4][5][6][7] Specifically, as one part of AZIBs, Zn metal anode exhibits some unique characteristics of high theoretical capacity (820 mAh g À 1 ) and low redox potential (À 0.76 V compared to a standard hydrogen electrode). [8,9] However, there are some fatal issues, such as dendrites formation, interface corrosion, production of hydrogen evolution and accumulated passivation layer in the Zn metal anode, greatly affecting the effective cycling of Zn electrode and working lifespan of AZIBs.…”

Section: Introductionmentioning

confidence: 99%

“…Among many electrochemical energy storage systems, aqueous zinc (Zn)‐ion batteries (AZIBs) adopting neutral or medium acid electrolytes are gradually becoming the most promising candidate of the next‐generation battery with high safety and nontoxic property. Except for this, aqueous electrolytes used in the AZIBs can reduce the cost of large‐scale application and deliver the high ionic conductivity (∼1 S cm −1 ), much superior to these batteries (e. g., lithium‐ion and sodium‐ion battery) based on organic electrolytes [1–7] . Specifically, as one part of AZIBs, Zn metal anode exhibits some unique characteristics of high theoretical capacity (820 mAh g −1 ) and low redox potential (−0.76 V compared to a standard hydrogen electrode) [8,9] .…”

Section: Introductionmentioning

confidence: 99%

Improved Interface Stability and Zinc‐Ions Distribution Achieved by Functional Protective Layer Containing Abundant Oxygen Sites and Regular Channels for Long‐Life Zinc‐Metal Anodes

Zhang

liu

et al. 2022

Batteries & Supercaps

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Aqueous zinc (Zn)-ion batteries (AZIBs) have attracted much attention for the high safety, economy and nontoxic property, but further practical applications are still hindered due to the severe interfacial corrosion and annoying dendrite growth. Herein, a functional protective layer (FPL) containing abundant oxygen sites and regular channels is proposed as the surface coating to stabilize the Zn-metal anode. Specifically, transferred free water molecules and mitigated Zn-ions can be attracted by these polar oxygen sites, beneficially reliving corrosion behavior, reducing side reactions and inducing uniform Zn deposition. Furthermore, the cross-linked structure with opening channels of FPL benefits electrolyte to quickly arrive the electrode surface and maintain the superior movement of Znions. As a result, a superior cycling performance with high stability of 450 h at 5 mA cm À 2 and excellent rate behavior have been endowed by Zn electrode loading FPL. In the exploration of practical utilization, full battery consisting of Zn@FPL anode and cathode adopting commercial MnO 2 powder also exhibits an outstanding capacity retention of 98.9 % after 300 cycles at 0.5 A g À 1 . The proposed strategy of constructing a protective layer with functional sites and opening structure shows a good guiding significance for protecting Zn-metal anode.

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“…[11] For these reasons, some recent researches has been focused on the development of new types of LMA// high-capacity Li-free cathode batteries. [12][13][14][15][16][17] However, the unfavorable properties of conversion-type cathode materials, such as the inevitable volume change and voltage hysteresis due to bond breaking/reconstruction and loss of sulfur during cycling, consequently cause fast capacity fading and finally cell failure. [18,19] Unlike conversion-type lithium-free cathodes, V 2 O 5To realize a high-energy lithium metal battery (LMB) using a high-capacity Li-free cathode, in this work, nanoplate-stacked V 2 O 5 with dominantly exposed (010) facets and a relatively short [010] length is proposed to be used as a cathode.…”

mentioning

confidence: 99%

Realization of a 594 Wh kg⁻¹ Lithium‐Metal Battery Using a Lithium‐Free V₂O₅ Cathode with Enhanced Performances by Nanoarchitecturing

Sim

Kwon

Lee

et al. 2022

Small

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attention due to its lowest redox potential (−3.04 V vs SHE) and an ultrahigh theoretical capacity (2061 mAh cm −3 and 3860 mAh g −1 ). [4] Inspired by this, when various conventional cathode materials, such as LiFePO 4 , LiCoO 2 , NCM622, and NCM811, are coupled with LMA, they can only deliver restrained specific energy at the material level (based on theoretical specific energy-LiFePO 4 : 560 Wh kg −1 , LiCoO 2 : 520 Wh kg −1 , NCM622: 690 Wh kg −1 , and NCM811: 750 Wh kg −1 ) due to the capacity limitations of conventional cathode materials (theoretical specific capacities-LiFePO 4 : 170 mAh g −1 , LiCoO 2 : 140 mAh g −1 , NCM622: 187 mAh g −1 , and NCM811: 203 mAh g −1 ). [5] Moreover, in actual systems, the theoretical energy is mostly halved because the theoretical capacities of cathodes are significantly decreased at the charge/discharge rates generally used. Under such a background, to realize actual high-energy lithium-metal batteries (LMBs) exceeding 500-600 Wh kg −1 , the exploration of new high-capacity and high-rate cathodes for rational matching with LMAs is needed, even expanding to lithium-free materials. When considering the LMB system, not only should excessive use of lithium in lithium-containing cathode materials be suppressed due to the high cost and limited resources but also lithium-free cathode materials are much more attractive for their higher theoretical specific capacities, such as intercalation-reaction based V 2 O 5 (294 mAh g −1 , based on an insertion of two lithium per formula unit) and MoO 3 (279 mAh g −1 ) and conversion-reaction based FeS 2 (894 mAh g −1 ), and elemental S (1672 mAh g −1 ). [6][7][8][9][10] Moreover, their high theoretical specific capacities lower the areal cathode loading mass, as the limited rate capability caused by the thick electrode increasing the ion diffusion length and underutilization of active materials can be alleviated. [11] For these reasons, some recent researches has been focused on the development of new types of LMA// high-capacity Li-free cathode batteries. [12][13][14][15][16][17] However, the unfavorable properties of conversion-type cathode materials, such as the inevitable volume change and voltage hysteresis due to bond breaking/reconstruction and loss of sulfur during cycling, consequently cause fast capacity fading and finally cell failure. [18,19] Unlike conversion-type lithium-free cathodes, V 2 O 5To realize a high-energy lithium metal battery (LMB) using a high-capacity Li-free cathode, in this work, nanoplate-stacked V 2 O 5 with dominantly exposed (010) facets and a relatively short [010] length is proposed to be used as a cathode. The V 2 O 5 nanostructure can be fabricated via a modified hydrothermal method, including a Li + crystallization inhibitor, followed by heat treatment. In particular, the enlargement of the favorable Li + diffusion pathway in the [010] direction and the formation of a robust hierarchical nanoplate-stacked structure in the modified V 2 O 5 improves the electrochemical kinetics and stability; as a resul...

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Exploring the Janus structure to improve kinetics in sulfur conversion of Li-S batteries

Cited by 28 publications

References 47 publications

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

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

Improved Interface Stability and Zinc‐Ions Distribution Achieved by Functional Protective Layer Containing Abundant Oxygen Sites and Regular Channels for Long‐Life Zinc‐Metal Anodes

Realization of a 594 Wh kg⁻¹ Lithium‐Metal Battery Using a Lithium‐Free V₂O₅ Cathode with Enhanced Performances by Nanoarchitecturing

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Exploring the Janus structure to improve kinetics in sulfur conversion of Li-S batteries

Cited by 28 publications

References 47 publications

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

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

Improved Interface Stability and Zinc‐Ions Distribution Achieved by Functional Protective Layer Containing Abundant Oxygen Sites and Regular Channels for Long‐Life Zinc‐Metal Anodes

Realization of a 594 Wh kg−1 Lithium‐Metal Battery Using a Lithium‐Free V2O5 Cathode with Enhanced Performances by Nanoarchitecturing

Contact Info

Product

Resources

About

Realization of a 594 Wh kg⁻¹ Lithium‐Metal Battery Using a Lithium‐Free V₂O₅ Cathode with Enhanced Performances by Nanoarchitecturing