Hollow carbon spheres with nanoporous shells and tailored chemical interfaces as sulfur host for long cycle life of lithium sulfur batteries

Liu, Shuangke; Hong, Xiaobin; Wang, Danqin; Li, Yujie; Xu, Jing; Zheng, Chunman; Xie, Kai

doi:10.1016/j.electacta.2018.05.029

Cited by 48 publications

(15 citation statements)

References 42 publications

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“…f) Comparison of the capacity delay per cycle of this work with other reports with similar structure. [ 13,14,18–20,52–64 ] g) Cycling stability of SG@S‐1:7 with high sulfur loading and low ratio of electrolyte volume (µL)/sulfur mass (mg).…”

Section: Resultsmentioning

confidence: 99%

Template‐Free Self‐Caging Nanochemistry for Large‐Scale Synthesis of Sulfonated‐Graphene@Sulfur Nanocage for Long‐Life Lithium‐Sulfur Batteries

Feng

Dai³

et al. 2021

Adv Funct Materials

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Big volume changes, the shuttle effect, and poor conductivity are well‐known, critical issues of sulfur electrodes that prevent practical application of lithium‐sulfur batteries. The design of active materials with a conductive shell provides an effective solution. Traditional strategies have long been limited for practical applications; however, by low productivity and time/energy consuming template‐based methods. Here, a facile template‐free self‐caging nanotechnology for the scalable fabrication of graphene@sulfur nanocages with atomic‐scale shells is reported. To do that, a new sulfur‐graphene nanochemistry based on a reductive sulfur solution and oxidative sulfonated‐graphene dispersion is developed for the first time. With only the help of mechanical mixing, sulfur particles are successfully synthesized in situ and encapsulated into reaction‐induced self‐assembled sulfonated‐graphene nanocages. These unique nanocages not only provide accommodation of the big volume changes in the active materials, but also exhibit robust polysulfide trapping capability due to the synergistic effects from physical blocking and strong chemical absorption. As a result, the resultant sulfur cathodes deliver superior electrochemical performance and have shown an extremely slow capacity decay of 0.019% per cycle at 0.5 C for over 2000 cycles. This study introduces a new self‐caging nanochemistry for scalable synthesis of functional nanocages with significant applications beyond lithium‐sulfur batteries.

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Section: Resultsmentioning

confidence: 99%

Template‐Free Self‐Caging Nanochemistry for Large‐Scale Synthesis of Sulfonated‐Graphene@Sulfur Nanocage for Long‐Life Lithium‐Sulfur Batteries

Feng

Dai³

et al. 2021

Adv Funct Materials

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“…Therefore, tuning the porosity of HPCS is very important to improve the capacity and stability of the HPCS/S cathodes. Aiming to tune and optimize the porosity, a series of HPCS were further investigated using various hard and soft templates …”

Section: Sulfur Cathodes Based On Hollow Porous Carbon Materialsmentioning

confidence: 99%

Recent Advances in Hollow Porous Carbon Materials for Lithium–Sulfur Batteries

Wang

Pei

et al. 2019

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Lithium–sulfur (Li–S) batteries are considered as one of the most potential next‐generation rechargeable batteries due to their high theoretical energy density. However, some critical issues, such as low capacity, poor cycling stability, and safety concerns, must be solved before Li–S batteries can be used practically. During the past decade, tremendous efforts have been devoted to the design and synthesis of electrode materials. Benefiting from their tunable structural parameters, hollow porous carbon materials (HPCM) remarkably enhance the performances of both sulfur cathodes and lithium anodes, promoting the development of high‐performance Li–S batteries. Here, together with the templated synthesis of HPCM, recent progresses of Li–S batteries based on HPCM are reviewed. Several important issues in Li–S batteries, including sulfur loading, polysulfide entrapping, and Li metal protection, are discussed, followed by a summary on recent research on HPCM‐based sulfur cathodes, modified separators, and lithium anodes. After the discussion on emerging technical obstacles toward high‐energy Li–S batteries, prospects for the future directions of HPCM research in the field of Li–S batteries are also proposed.

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“…Liu et al in their work investigated the effect of microstructure morphology on the impedance response. They found out that the EIS curve varies with the nature of reaction kinetics in the solid-electrolyte interface, exchange current density and dielectric property of the materials [22]. Illig et al in this study, investigates the impedance response of an 18,650 cell inside a frequency range of 100 kHz-2 µHz by merging electrochemical impedance spectroscopy and time-domain measurements.…”

Section: Introductionmentioning

confidence: 98%

“…They used detector strategies and voltage contrast to improve the resolution of images of cell electrodes [21]. Liu et al used electrochemical impedance spectroscopy (EIS) and SEM to check and relate the resistance stability of electrode and the morphology characteristics [22]. Babu P A et al studied the performance of the cell by SEM analysis of the cathode and anode for different abuse conditions [23].…”

Section: Introductionmentioning

confidence: 99%

Material Characterization and Analysis on the Effect of Vibration and Nail Penetration on Lithium Ion Battery

Parasumanna

Karle

Saraf

2019

WEVJ

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Battery packaging in a vehicle depends on the cell chemistry being used and its behavior plays an important role in the safety of the entire battery pack. Chemical degradation of various parts of a cell such as the cathode or anode is a concern as it adversely affects performance and safety. A cell in its battery pack once assembled can have two different mechanical abuse condition. One is the vibration generated from the vehicle and the second is the intrusion of external elements in case of accident. In this paper, a commercially available 32,700 lithium ion cell with lithium iron phosphate (LFP) chemistry is studied for its response to both the abuse conditions at two different states of charge (SoC). The primary aim of this study is to understand their effect on the surface morphology of the cathode and the anode. The cells are also characterized to study impedance behavior before and after being abused mechanically. The cells tested for vibration were also analyzed for dynamic stiffness. A microscopy technique such as scanning electron microscopy (SEM) was used to study the surface morphology and electrochemical impedance spectroscopy (EIS) characterization was carried out to study the internal resistance of the cell. It was observed that there was a drop in internal resistance and increase in the stiffness after the cells subjected to mechanical abuse. The study also revealed different morphology at the center and at the corner of the cell subjected to nail penetration at 50% SoC.

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Hollow carbon spheres with nanoporous shells and tailored chemical interfaces as sulfur host for long cycle life of lithium sulfur batteries

Cited by 48 publications

References 42 publications

Template‐Free Self‐Caging Nanochemistry for Large‐Scale Synthesis of Sulfonated‐Graphene@Sulfur Nanocage for Long‐Life Lithium‐Sulfur Batteries

Template‐Free Self‐Caging Nanochemistry for Large‐Scale Synthesis of Sulfonated‐Graphene@Sulfur Nanocage for Long‐Life Lithium‐Sulfur Batteries

Recent Advances in Hollow Porous Carbon Materials for Lithium–Sulfur Batteries

Material Characterization and Analysis on the Effect of Vibration and Nail Penetration on Lithium Ion Battery

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