Rational design and superfast production of biomimetic, calendering-compatible, catalytic, sulfur-rich secondary particles for advanced lithium-sulfur batteries

Feng, Lanxiang; Ji, Yuan; Zhu, Zhiwei; Yu, Peng; Fu, Xuewei; Yang, Ming‐Bo; Wang, Yu; Yang, Wei

doi:10.1016/j.ensm.2021.05.038

Cited by 32 publications

(35 citation statements)

References 49 publications

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“…They proposed an active material microenvironment model to elucidate the role of the calendaring process on electrode quality. They showed that the calendaring process could alter the electrochemical performance of the cell by decreasing the volume fraction of mesopores and micropores, as well as reshaping and stabilizing the microstructures of the ion and electron transport network [137].…”

Section: Modeling and Manufacturingmentioning

confidence: 99%

A Perspective on Li/S Battery Design: Modeling and Development Approaches

McCreary

Kim

et al. 2021

Batteries

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Lithium/sulfur (Li/S) cells that offer an ultrahigh theoretical specific energy of 2600 Wh/kg are considered one of the most promising next-generation rechargeable battery systems for the electrification of transportation. However, the commercialization of Li/S cells remains challenging, despite the recent advancements in materials development for sulfur electrodes and electrolytes, due to several critical issues such as the insufficient obtainable specific energy and relatively poor cyclability. This review aims to introduce electrode manufacturing and modeling methodologies and the current issues to be overcome. The obtainable specific energy values of Li/S pouch cells are calculated with respect to various parameters (e.g., sulfur mass loading, sulfur content, sulfur utilization, electrolyte-volume-to-sulfur-weight ratio, and electrode porosity) to demonstrate the design requirements for achieving a high specific energy of >300 Wh/kg. Finally, the prospects for rational modeling and manufacturing strategies are discussed, to establish a new design standard for Li/S batteries.

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Section: Modeling and Manufacturingmentioning

confidence: 99%

A Perspective on Li/S Battery Design: Modeling and Development Approaches

McCreary

Kim

et al. 2021

Batteries

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Section: Introductionmentioning

confidence: 99%

“…The microstructure of this electrode is key to the final electronic properties, [9] and has been shown to be highly dependent on the processing in each step, e.g., coating technique, [10] drying temperatures, [3,11] calendaring. [12,13] It is therefore important to employ metrology at each stage, to gain understanding and enable modeling approaches, digital twins of the process, and in-line manufacturing control. [2,[14][15][16] Due to the complexity of the process and the number of variables involved, measuring the properties of the electrode slurry can be highly informative to optimize later steps, detect failures early, and prevent wastage.…”

mentioning

confidence: 99%

Rheology and Structure of Lithium‐Ion Battery Electrode Slurries

et al. 2022

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The rheology of electrode slurries dictates the final coating microstructure. High slurry viscosity creates excess pressure and limits coating speed, elasticity causes instabilities leading to coating defects and high flow causes slumping leading to thin, poorly structured coatings. However, due to differing solvent systems and components, and the complex nature of the many competing interactions, finding the source of these detrimental rheological properties can be difficult. Herein, a systematic rheological characterization of all components of an industrially relevant anode and cathode slurry is presented. Through a combinatory approach, the additive nature of the interactions is explored, using steady shear, small and large amplitude oscillatory shear to give insight into the underlying structure, which is vital to develop novel, more sustainable formulations. For water‐based anodes, the polymeric binder dictates the rheology, thickening the slurry, allowing efficient suspension of the active material particles, which only contribute an increase in viscosity. For N‐methyl pyrrolidine (NMP)‐based cathodes, the conductive additive forms a weakly gelled network in NMP which flows under coating shear. The binder, as well as thickening, also functions to adsorb to active material surfaces, displacing additive and leaving it free to form this network, which is key to the electronic properties of the dried electrode.

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“…[9][10][11] First, the non-conductive nature of elemental sulfur and discharge products will hinder the electron transfer and lead to poor active materials utilization. 12,13 Second, the large volume expansion of elemental sulfur particles will cause structural collapse and poor cycling stability of the lithium-sulfur batteries. 14,15 Finally, the shuttle effect of the discharge product of lithium polysulfide leads to poor electrochemical performance during the discharging and charging process.…”

Section: Introductionmentioning

confidence: 99%

“…So far, there have been some issues that inhibit the wide application of lithium–sulfur batteries 9‐11 . First, the non‐conductive nature of elemental sulfur and discharge products will hinder the electron transfer and lead to poor active materials utilization 12,13 . Second, the large volume expansion of elemental sulfur particles will cause structural collapse and poor cycling stability of the lithium–sulfur batteries 14,15 .…”

Section: Introductionmentioning

confidence: 99%

In situ load of sulfur species on hollow carbon spheres as advanced electrode for superior electrochemical activity

Yan-tao

2022

J of Chemical Tech & Biotech

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BACKGROUND Hollow carbon nanospheres (HCNS) were successfully prepared using silica as a template. After that, elemental sulfur particles were grown in situ on the surface of the hollow carbon nanospheres by a solution method to prepare HCNS/S composites. RESULTS The morphology and crystal structure of the samples were characterized by scanning electron microscopy and X‐ray diffraction. The electrochemical performance of the samples was tested by constant charge and discharge, cyclic voltammetry and electrochemical impedance spectra using coin 2032 half batteries. The electrochemical tests indicated that the as‐prepared HCNS/S composites exhibited an initial specific capacity of 1162 mA h g−1 at the current density of 0.2 C. CONCLUSION The electrochemical impedance spectra showed that the as‐prepared HCNS/S composites displayed superior electronic conductivity during electrochemical cycles. The employment of HCNS/S composites is beneficial for the improvement of electrochemical performance of lithium–sulfur batteries. © 2022 Society of Chemical Industry (SCI).

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Rational design and superfast production of biomimetic, calendering-compatible, catalytic, sulfur-rich secondary particles for advanced lithium-sulfur batteries

Cited by 32 publications

References 49 publications

A Perspective on Li/S Battery Design: Modeling and Development Approaches

A Perspective on Li/S Battery Design: Modeling and Development Approaches

Rheology and Structure of Lithium‐Ion Battery Electrode Slurries

In situ load of sulfur species on hollow carbon spheres as advanced electrode for superior electrochemical activity

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