A Novel Magnetic Coupling to Construct Spiral Deposition of Lithium Ions for Improving Anode Performance of Lithium-Sulfur Batteries

Cao, Yongan; Wu, Qiao; Wang, Wenju; Xiong, Zhi; Chen, Yuchao; Zhang, Biao; Zou, Jiaxuan; Zhu, Ting

doi:10.1149/1945-7111/abec98

Cited by 9 publications

(4 citation statements)

References 53 publications

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“…At 0.5 C, the CE with magnetic field is generally higher than that without magnetic field. According to the previous research of our group, 47 magnetic field can effectively improve the deposition process of lithium ions in anode and inhibit the generation of lithium dendrites. Thus, coupling a magnetic field can improve the coulombic efficiency.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Control of Electrolyte Trapping Polysulfide for Enhanced Lithium-Sulfur Batteries

Cao

Chen

et al. 2021

J. Electrochem. Soc.

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Lithium sulfur (Li-S) batteries are considered one of the most promising energy storage devices due to their high specific capacity, pollution-free reactant, and low cost. However, the “shuttle effect” of lithium polysulfide (Li2S x ) leads to a fast capacity decay and poor cycle life. Here, the magnetorheological effect (MRE) is first applied in Li-S batteries and a magnetic control electrolyte is designed by introducing carbonyl iron powders (CIPs) to improve the performance of Li-S batteries. According to adsorption bonding theory, the binding energy of Fe site with Li2S4 is up to 2.68 eV via discrete Fourier transform (DFT) calculation. After coupling an external magnetic field, the uniform distribution of CIPs avoids the accumulation on the cathode surface. The induced magnetic field of spherical particles captures dissolved S x 2− effectively by Lorenz force, which is confirmed by adsorption experiments. These magnetized particles form a magnetic shield layer in the electrolyte and alleviate the “shuttle effect.” At 0.2 C, the initial specific capacity reaches 1296 mAh g−1. Magnetic control electrolyte provides not only a novel insight but also creates a new possibility for mitigating the “shuttle effect” thereby promoting performance of Li-S batteries.

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Section: Resultsmentioning

confidence: 99%

Magnetic Control of Electrolyte Trapping Polysulfide for Enhanced Lithium-Sulfur Batteries

Cao

Chen

et al. 2021

J. Electrochem. Soc.

Self Cite

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“…232 Furthermore, alternative approaches, including the employment of centrally symmetric and curved magnetic fields, have been investigated to curb lithium dendrite growth and enhance the efficacy of Li-S batteries. 233 Table 5 presents the electrochemical performance metrics of both symmetric cells and full cells with Li alloy improvements previously discussed.…”

Section: Other LI Alloy Anodesmentioning

confidence: 99%

“…In all, alloy‐type anodes face challenges such as large initial irreversible capacity and diminished energy density of full cells due to the consumption of Li + in the shuttle effect 232 . Furthermore, alternative approaches, including the employment of centrally symmetric and curved magnetic fields, have been investigated to curb lithium dendrite growth and enhance the efficacy of Li‐S batteries 233 . Table 5 presents the electrochemical performance metrics of both symmetric cells and full cells with Li alloy improvements previously discussed.…”

Section: Remaining LI Anode Stablementioning

confidence: 99%

An examination and prospect of stabilizing Li metal anode in lithium–sulfur batteries: A review of latest progress

Song,

Su,

Liu

et al. 2023

Electron

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The Li metal anode emerges as a formidable competitor among anode materials for lithium–sulfur (Li‐S) batteries; nevertheless, safety issues pose a significant hurdle in its path toward commercial viability. This review enumerates three historical challenges inherent to the Li metal anode: unavoidable volume expansion, multifunctional solid electrolyte interface formation, and uncontrollable lithium dendrite growth. In particular, when paired with a sulfur cathode, the Li anode presents an additional unique hurdle: the shuttle effect. To address these issues, this article offers a thorough examination of the latest innovations aimed at stabilizing the Li metal anode within Li‐S batteries. We categorize these approaches into five classifications: liquid electrolyte optimization, enhancement of non‐liquid‐state electrolytes, Li metal surface modification, Li anode architecture design, and Li alloy improvement. For several noteworthy results within these categories, we have compiled their electrochemical performance into tables, facilitating direct comparison. This detailed analysis illuminates feasible strategies and suggests directions warranting further exploration for optimizing the capability and safety of Li metal anodes in Li‐S batteries.

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“…4,5 Many strategies have been proposed to improve CE, including Multiphysics coupling (e.g. coupling central symmetric and curved magnetic field), 6 electrolyte engineering (e.g. localized high-concentration electrolytes), [7][8][9] use of a 3D host (e.g.…”

mentioning

confidence: 99%

Study on Stable Lithiophilic Ag Modification Layer on Copper Current Collector for High Coulombic-Efficiency Lithium Metal Anode

Xia¹,

Wang²,

Wang³

et al. 2023

J. Electrochem. Soc.

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High energy-density lithium metal batteries will be crucial in improving the driving range and promoting electric vehicles. The lithophilic modification layer is usually introduced to improve CE and cycle stability. However, the stability of the lithophilic modified layer in long-term cycling and lithophilic modification strategies for anode current collectors in all-solid-state anode-free lithium batteries are rarely investigated. Here, we prove the failure process of the silver lithophilic modified layer towards lithium metal anode through electrochemical cycling in liquid electrolytes. Combined with electrochemical impedance spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy analysis, the failure is due to the formation of solid electrolyte interface on the Ag surface and the silver particles' peeling off from the current collector during cycling, which forms "dead silver". And we construct carbon-incorporated lithium phosphorous oxynitride (LiCPON) -based all-solid-state Li/Cu half-cells to evaluate the stability of the lithophilic Ag layer. The introduction of Ag between solid electrolyte (LiCPON) and current collector enables the long-term cycle (367th) of all-solid-state Li/Cu half cells with high CE. Our work clarifies the issue of Ag deactivation and provides a method for evaluating modified layers' use and building stable electrolyte/anode interfaces in all-solid-state anode-free lithium batteries.

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A Novel Magnetic Coupling to Construct Spiral Deposition of Lithium Ions for Improving Anode Performance of Lithium-Sulfur Batteries

Cited by 9 publications

References 53 publications

Magnetic Control of Electrolyte Trapping Polysulfide for Enhanced Lithium-Sulfur Batteries

Magnetic Control of Electrolyte Trapping Polysulfide for Enhanced Lithium-Sulfur Batteries

An examination and prospect of stabilizing Li metal anode in lithium–sulfur batteries: A review of latest progress

Study on Stable Lithiophilic Ag Modification Layer on Copper Current Collector for High Coulombic-Efficiency Lithium Metal Anode

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