Research progress in hollow nanocomposite materials for lithium-sulfur batteries cathodes

Ma, Ying; Wang, Lei; Li, Zhao; Wei, Anke

doi:10.1016/j.jallcom.2022.166276

Cited by 13 publications

(4 citation statements)

References 138 publications

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“…[22] Elemental sulfur deposited on a conductive substrate (usually a metal current collector) is a routine cathode material for LSBs to accomplish the multielectron redox reaction with lithium ions and form Li 2 S during discharge. [23] However, there are several issues with sulfur as the cathode for LSBs. First, the poor ionic and electrical conductivity of elemental sulfur and the discharged products (including Li 2 S 2 and Li 2 S) suppress charge transfer at the cathode, resulting in sluggish kinetics of the electrochemical process.…”

Section: Cathodementioning

confidence: 99%

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Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

Shearer

et al. 2023

Advanced Sustainable Systems

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The continuously increasing demands for energy storage devices for portable electronics and electric vehicles have aroused massive research interest in developing lithium–sulfur batteries (LSBs) with high energy density and long‐term stability. Carbon nanotubes (CNTs), possessing numerous superior properties, are integrated into various components of LSBs for performance improvement. Nevertheless, a systematic and insightful issue‐based study of their inherent roles in addressing the practical challenges of LSBs is lacking. There is a growing consensus that CNTs do not directly contribute to the specific capacity (i.e., being involved in the redox reactions with electron loss/gain), while their auxiliary roles, such as providing a conductive and mechanically reinforced framework for active materials, are of prime significance in regulating the electrochemical reaction, charge transport, and mass transfer in the system. In this paper, after briefly introducing the working principles of LSBs and the promising applicability of CNTs, current challenges in various components of LSBs are discussed with the corresponding CNT‐based solutions, followed by an evaluation of the potential for commercializing CNT‐involved LSBs. Finally, some future research directions are provided to improve the device performance further.

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Section: Cathodementioning

confidence: 99%

Section: Challenges Of Lithium–sulfur Batteriesmentioning

confidence: 99%

Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

Shearer

et al. 2023

Advanced Sustainable Systems

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“…Scores of researchers are ramping up efforts to sort out the issues faced by LSBs, with the strategies involving the designs of cathode materials, 5,6 functionalization of separators, 7−9 electrolyte manipulation, 10,11 and protection of lithium electrodes. 12,13 Most remarkable of all, separator modification can endow the separators with multiple functions, such as ionic selectivity, catalyzing polysulfide conversion, and stymying polysulfide shuttling.…”

Section: Introductionmentioning

confidence: 99%

Expediting Polysulfide Evolution Kinetics via Porous Carbon Microspheres Embedded with Fe₃Se₄ Nanoparticles as a Separator Modifier for Lithium–Sulfur Batteries

Liu,

Lu,

Yuan

et al. 2024

ACS Sustainable Chem. Eng.

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As a prospective substitution for conventional lithium-ion batteries, lithium−sulfur batteries have been propelled into the spotlight on account of their merits, such as high energy density and ecofriendliness, among other things. Their commercialization, however, has run up against thorny impediments, with them primarily embodying sluggish evolution kinetics of sulfur species, the adverse shuttle effect of soluble polysulfide ions, and insufficient electronic conductivity of S 8 /Li 2 S 2 /Li 2 S. Herein, a multifunctional separator modifier based on porous carbonaceous microspheres inlaid with Fe 3 Se 4 nanoparticles (Fe 3 Se 4 /PCM) is proposed to surmount these hurdles. The porous carbon skeleton offers a wealth of adsorption sites for the physical immobilization of polysulfides in tandem with excellent electrical conductivity. Beyond chemically fixing polysulfide intermediates, the embedded Fe 3 Se 4 can facilitate the conversion reaction from Li 2 S 2 to Li 2 S. Attributed to the superiority of Fe 3 Se 4 /PCM, the final batteries deliver a high utilization rate of sulfur (1179.2 mAh•g −1 at 0.1 C), a superb rate capability of 486.4 mAh•g −1 at 3 C, and prolonged cycling stability (a low degradation rate of 0.04% per cycle over 500 cycles at 1 C). This work may provide a novel formula for designing a string of transition-metal selenides/porous carbon composites as separator modifiers to achieve robust lithium−sulfur batteries.

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“…In the past decades, various approaches have been taken to address the aforementioned challenges. One such tactic is the combination of sulfur with different types of carbons (such as graphene, porous carbon, carbon nanotubes, and nanofibers , ) to mitigate the low conductivity and significant volume expansion (about 78%) of sulfur and Li 2 S. However, the issues of shuttle effect, low sulfur utilization, and sluggish conversion kinetics remain unresolved due to the weak interfacial interaction between nonpolar carbon and polar LiPSs. To counteract these problems, additive materials with stronger chemisorption, particularly transition metal oxides − and hydroxides, , have been introduced to anchor soluble LiPSs and suppress the shuttle effect.…”

Section: Introductionmentioning

confidence: 99%

Manipulating Sulfur Conversion Kinetics through Interfacial Built-In Electric Field Enhanced Bidirectional Mott–Schottky Electrocatalysts in Lithium–Sulfur Batteries

Liu

Zeng

et al. 2023

ACS Appl. Mater. Interfaces

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Efficient electrocatalysts and catalytic mechanisms remain a pressing need in Li−S electrochemistry to address lithium polysulfide (LiPS) shuttling and enhance conversion kinetics. This study presents the development of multifunctional VO 2 @rGO heterostructures, incorporating interfacial built-in electric field (BIEF) enhancement, as a Mott−Schottky electrocatalyst for Li−S batteries. Electrochemical experiments and theoretical analysis demonstrate that the interfacial BIEF between VO 2 and rGO induces self-driven charge redistribution, resulting in accelerated charge transport rates, enhanced LiPS chemisorption, reduced energy barriers for Li 2 S nucleation/decomposition, and improved Li-ion diffusion behavior. The Mott−Schottky electrocatalyst, combining the strengths of VO 2 's anchoring ability, rGO's metallic conductivity, and BIEF's optimized charge transport, exhibits an outstanding "trapping− conversion" effect. The modified Li−S battery with a VO 2 @rGO-modified separator achieves a highly reversible capacity of 558.0 mAh g −1 at 2 C over 600 cycles, with an average decay rate of 0.048% per cycle. This research offers valuable insights into the design of Mott−Schottky electrocatalysts and their catalytic mechanisms, advancing high-efficiency Li−S batteries and other multielectron energy storage and conversion devices.

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Research progress in hollow nanocomposite materials for lithium-sulfur batteries cathodes

Cited by 13 publications

References 138 publications

Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

Expediting Polysulfide Evolution Kinetics via Porous Carbon Microspheres Embedded with Fe₃Se₄ Nanoparticles as a Separator Modifier for Lithium–Sulfur Batteries

Manipulating Sulfur Conversion Kinetics through Interfacial Built-In Electric Field Enhanced Bidirectional Mott–Schottky Electrocatalysts in Lithium–Sulfur Batteries

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Research progress in hollow nanocomposite materials for lithium-sulfur batteries cathodes

Cited by 13 publications

References 138 publications

Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

Solutions to the Challenges of Lithium–Sulfur Batteries by Carbon Nanotubes

Expediting Polysulfide Evolution Kinetics via Porous Carbon Microspheres Embedded with Fe3Se4 Nanoparticles as a Separator Modifier for Lithium–Sulfur Batteries

Manipulating Sulfur Conversion Kinetics through Interfacial Built-In Electric Field Enhanced Bidirectional Mott–Schottky Electrocatalysts in Lithium–Sulfur Batteries

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Expediting Polysulfide Evolution Kinetics via Porous Carbon Microspheres Embedded with Fe₃Se₄ Nanoparticles as a Separator Modifier for Lithium–Sulfur Batteries