Electrochemical process of sulfur in carbon materials from electrode thickness to interlayer

Tang, Xusheng; Sun, Zhenhua; Yang, Huijing; Fang, Hai‐Tao; Wei, Fei; Cheng, Hui‐Ming; Zhuo, Shuping; Li, Feng

doi:10.1016/j.jechem.2018.06.001

Cited by 43 publications

(18 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Issues presented in the sulfur cathode including low electronic and ionic conductivity, slow kinetics, and poor electrolyte infiltration will become more serious. [46] Therefore, high-conductive and high-stable sulfur hosts, faster redox kinetics, and favorable solvated polysulfide anions are critical under lean-electrolyte conditions. The strategies for high-performance lean-electrolyte Li-S batteries lie in optimal structural design of the cathode (including the carbon/ sulfur composite and the overall cathode fabrication), kinetic regulation by heterogeneous electrocatalysts and homogeneous redox mediators, as well as individual regulation of the electrolyte.…”

Section: Li-s Batteries Based On Solid-liquid Conversionmentioning

confidence: 99%

Lithium–Sulfur Batteries under Lean Electrolyte Conditions: Challenges and Opportunities

et al. 2020

View full text Add to dashboard Cite

The development of energy‐storage devices has received increasing attention as a transformative technology to realize a low‐carbon economy and sustainable energy supply. Lithium–sulfur (Li–S) batteries are considered to be one of the most promising next‐generation energy‐storage devices due to their ultrahigh energy density. Despite the extraordinary progress in the last few years, the actual energy density of Li–S batteries is still far from satisfactory to meet the demand for practical applications. Considering the sulfur electrochemistry is highly dependent on solid‐liquid‐solid multi‐phase conversion, the electrolyte amount plays a primary role in the practical performances of Li–S cells. Therefore, a lean electrolyte volume with low electrolyte/sulfur ratio is essential for practical Li–S batteries, yet under these conditions it is highly challenging to achieve acceptable electrochemical performances regarding sulfur kinetics, discharge capacity, Coulombic efficiency, and cycling stability especially for high‐sulfur‐loading cathodes. In this Review, the impact of the electrolyte/sulfur ratio on the actual energy density and the economic cost of Li–S batteries is addressed. Challenges and recent progress are presented in terms of the sulfur electrochemical processes: the dissolution–precipitation conversion and the solid–solid multi‐phasic transition. Finally, prospects of future lean‐electrolyte Li–S battery design and engineering are discussed.

show abstract

Section: Li-s Batteries Based On Solid-liquid Conversionmentioning

confidence: 99%

Lithium–Sulfur Batteries under Lean Electrolyte Conditions: Challenges and Opportunities

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Thed esign strategy of an electrolyte for lithium batteries (lithium ion, lithium-sulfur and lithium-air) is taken as an example,and the following steps are involved: [34][35][36][37] 1) selecting one or more suitable organic solvents to dissolve the appropriate lithium salt and achieve as uitable ionic conductivity 2) identifying solvated cations with arelatively low desolvation activation energy that can achieve reversible electrostripping/deposition (or intercalation/deintercalation).…”

Section: Basic Demands Of the Electrolytementioning

confidence: 99%

“…All these essential conditions make up the “electrolyte tetrahedron” (Figure ) and none of them can be ignored. The design strategy of an electrolyte for lithium batteries (lithium ion, lithium‐sulfur and lithium‐air) is taken as an example, and the following steps are involved:…”

Section: Aluminum Electrostripping/deposition Mechanisms In a Rtil Elmentioning

confidence: 99%

The Rechargeable Aluminum Battery: Opportunities and Challenges

et al. 2019

Self Cite

View full text Add to dashboard Cite

Aluminum battery systems are considered as a system that could supplement current lithium batteries due to the low cost and high volumetric capacity of aluminum metal, and the high safety of the whole battery system. However, first the use of ionic liquid electrolytes leading to AlCl4− instead of Al3+, the different intercalation reagents, the sluggish solid diffusion process and the fast capacity fading during cycling in aluminum batteries all need to be thoroughly explored. To provide a good understanding of the opportunities and challenges of the newly emerging aluminum batteries, this Review discusses the reaction mechanisms and the difficulties caused by the trivalent reaction medium in electrolytes, electrodes, and electrode–electrolyte interfaces. It is hoped that the Review will stimulate scientists and engineers to develop more reliable aluminum batteries.

show abstract

“…The thick electrode with high areal sulfur loading is crucially important for practical LSBs. [35] The cyclic performance of S-MoS 2 /CFs with a high sulfur loading of 4.2 mg cm À 2 was further investigated at 1 C (Figure 4f). The S-MoS 2 /CFs cathode shows high discharge capacity of 553 mAh g À 1 at 1 C corresponds to 85% capacity retention over 100 cycles.…”

Section: Resultsmentioning

confidence: 99%

Dense MoS₂ Micro‐Flowers Planting on Biomass‐Derived Carbon Fiber Network for Multifunctional Sulfur Cathodes

et al. 2020

View full text Add to dashboard Cite

The significant challenge in lithium-sulfur batteries (LSBs) arises from low conductivity of sulfur cathode, loss of active sulfur species due to less anchoring sites and sluggish redox kinetics of lithium polysulfides (LPSs). Herein, the dense MoS 2 microflowers assembled by cross-linked 2D MoS 2 nanoflakes planting on biomass-derived carbon fiber (CF) network (MoS 2 /CFs) are fabricated as multifunctional sulfur cathodes of LSBs. The 2D MoS 2 nanoflakes supported on CF provide abundant anchoring sites for strong adsorption, while the 3D flowerlike structure prevents lamellar aggregation of 2D MoS 2 nanoflakes. Importantly, the dense MoS 2 micro-flowers planting on the network weaved by biomass-derived CFs ensures the high electronic conductivity of the MoS 2 /CFs composite, sufficient electrode/ electrolyte interaction, fast electron and Li + transportation. Moreover, the CF network weaved from cost-effective tissue paper reduces the cost of LSBs. Thus, the S-MoS 2 /CFs cathode exhibits a high rate capability (1149 and 608 mA h g À 1 are obtained at 0.2 C and 4 C, respectively), excellent cyclic performance with ∼ 75% capacity retention and 99% Coulombic efficiency at 2 C after 500 cycles, corresponding to ∼ 0.05% capacity fading per cycle only, as well as structure integrity during the discharge/charge process.

show abstract

Electrochemical process of sulfur in carbon materials from electrode thickness to interlayer

Cited by 43 publications

References 30 publications

Lithium–Sulfur Batteries under Lean Electrolyte Conditions: Challenges and Opportunities

Lithium–Sulfur Batteries under Lean Electrolyte Conditions: Challenges and Opportunities

The Rechargeable Aluminum Battery: Opportunities and Challenges

Dense MoS₂ Micro‐Flowers Planting on Biomass‐Derived Carbon Fiber Network for Multifunctional Sulfur Cathodes

Contact Info

Product

Resources

About

Electrochemical process of sulfur in carbon materials from electrode thickness to interlayer

Cited by 43 publications

References 30 publications

Lithium–Sulfur Batteries under Lean Electrolyte Conditions: Challenges and Opportunities

Lithium–Sulfur Batteries under Lean Electrolyte Conditions: Challenges and Opportunities

The Rechargeable Aluminum Battery: Opportunities and Challenges

Dense MoS2 Micro‐Flowers Planting on Biomass‐Derived Carbon Fiber Network for Multifunctional Sulfur Cathodes

Contact Info

Product

Resources

About

Dense MoS₂ Micro‐Flowers Planting on Biomass‐Derived Carbon Fiber Network for Multifunctional Sulfur Cathodes