Bifunctional electrolyte additive with redox mediation and capacity contribution for sulfur cathode in aqueous Zn-S batteries

Chang, Ge; Liu, Jilei; Hao, Yisu; Huang, Cong; Yang, Yujie; Yang, Qian; Chen, Xiaohua; Tang, Qunli; Hu, Aiping

doi:10.1016/j.cej.2022.141083

Cited by 30 publications

(24 citation statements)

References 40 publications

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“…Chang et al used novel bifunctional electrolyte additive TU in 2 M ZnSO 4 to prevent SO 4 2− production and the loss of active S throughout cycles. 38 The S@KB electrode with electrolyte ZnSO 4 + TU displayed a high reversible capacity of 1785.1 mAh g −1 and an average discharge potential of 0.45 V (Figure 8a) at a current density of 1 A g −1 . As a result of these efforts, the energy density of the battery was significantly increased to 803.3 Wh kg −1 .…”

Section: Thiourea (Tu)mentioning

confidence: 99%

“…Apart from the poor conductivity, formed ZnS has a low solubility product ( K sp ) value of 1.2 × 10 –23 , which increases the cell resistance . Furthermore, the Zn 2+ ion transport is blocked by the low wettability of the sulfur cathode with the aqueous electrolyte (Figure c), which leads to significant polarization .…”

Section: Inherent Challengesmentioning

confidence: 99%

“…Exposure of sulfur in the cathode directly to dissolved O 2 in the electrolyte and interaction of ZnS with H 2 O during charging create an irreversible byproduct of SO 4 2– , which cannot be utilized again, lowering electrode reversibility and leading to the loss of active sulfur material (panels e and f of Figure ). To enhance the cycling performance of the cathode, it is beneficial to optimize its synthesis approach to reduce the direct surface exposure to sulfur in the composite and remove dissolved O 2 in the electrolyte.…”

Section: Inherent Challengesmentioning

confidence: 99%

“…TU has the ability to enhance specific capacities through the facilitation of reversible redox conversion processes, and it also weakens the Zn–S bond during charge and enhances electrochemical dynamics through interactions with intermediates TU – and Met + . Chang et al used novel bifunctional electrolyte additive TU in 2 M ZnSO 4 to prevent SO 4 2– production and the loss of active S throughout cycles . The S@KB electrode with electrolyte ZnSO 4 + TU displayed a high reversible capacity of 1785.1 mAh g –1 and an average discharge potential of 0.45 V (Figure a) at a current density of 1 A g –1 .…”

Section: Electrolyte Modificationsmentioning

confidence: 99%

Section: Electrolyte Modificationsmentioning

confidence: 99%

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Minireview on Aqueous Zinc–Sulfur Batteries: Recent Advances and Future Perspectives

Patel

Sharma

2023

Energy Fuels

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An aqueous zinc–sulfur battery (AZSB) represents a promising next-generation energy storage technology as a result of its salient features of safety, affordability, and environmental benignity. The incorporation of earth-abundant and environmentally friendly sulfur cathodes, zinc anodes, and aqueous electrolytes, coupled with the high theoretical energy density, positions an AZSB as a cost-effective and scalable technology with potential applications in grid-scale energy storage and portable electronics. This review provides a comprehensive review of the current status of research in AZSBs, discussing challenges faced, recent advances, and future perspectives. The major challenges associated with the aqueous electrolyte, zinc anode, and sulfur cathode are discussed in detail with a rational classification. These challenges limit the performance, cycling stability, and overall efficiency of AZSBs. Various strategies to address these issues, including electrolyte modification and electrode design, are critically analyzed and evaluated. Specifically, the review highlights recent advancements in research, including the development of advanced electrolytes by adding additives and the synthesis of novel electrode materials for enhanced electrochemical performance. Further, the utility of advanced characterization techniques for understanding and predicting the reaction mechanism occurring in an AZSB is reviewed. Along with a review of ongoing research activities in the field, future prospects and potential applications of this novel battery technology are also explored. Overall, this review identifies the need for continued research and development efforts to overcome the remaining challenges and, thus, realize the full potential of AZSBs in practical energy storage applications.

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Section: Thiourea (Tu)mentioning

confidence: 99%

Section: Inherent Challengesmentioning

confidence: 99%

Section: Inherent Challengesmentioning

confidence: 99%

Section: Electrolyte Modificationsmentioning

confidence: 99%

Section: Electrolyte Modificationsmentioning

confidence: 99%

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Minireview on Aqueous Zinc–Sulfur Batteries: Recent Advances and Future Perspectives

Patel

Sharma

2023

Energy Fuels

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The Rise of Multivalent Metal–Sulfur Batteries: Advances, Challenges, and Opportunities

Zhao,

Xiao,

Liu

et al. 2024

Adv Funct Materials

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As the “star of hope” for the next‐generation high‐energy‐density batteries, lithium–sulfur batteries (Li–S batteries) face severe challenges such as reserves, costs, and safety, which seriously restrict their practical application. Alternatively, research on multivalent metals (e.g., Mg, Ca, Al, Zn, etc.) as anodes, characterized by less reactivity and higher natural abundance, is gaining increasing attention and urgent demand. However, metal–sulfur (M–S) battery technology based on multivalent metal anodes is still in its infancy and not yet mature for practical application. This review provides insights into the challenges and prospects of multivalent M–S batteries, covering fundamental mechanisms, key issues, response strategies, and the latest advancements in flexible/micro energy storage devices. Furthermore, a general perspective and future research directions are also presented in this review. This review aims to explore opportunities for emerging multivalent M–S batteries and support the development of next‐generation high‐energy‐density energy storage systems.

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Internal Electron Donor Accelerated Sulfur Redox for Aqueous Zn─S Batteries

Zhang,

Yang,

Xiao

et al. 2024

Adv Funct Materials

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Improving the electrical conductivity of sulfur cathode while ensuring its high affinity to catalyst holds the key to facilitate the reaction kinetics of aqueous zinc–sulfur batteries. Herein, the sulfur redox in aqueous electrolyte is accelerated by introducing selenium–sulfur bonds into the sulfur structure to build an internal electron transport path. The Se with less electronegativity can act as an electron donor to accelerate the binding between S and Zn2+. Meanwhile, the bonded Se in the electron‐poor state endows the modified sulfur cathode with a strong affinity to the I3− catalyst, which further facilitates the conversion efficiency. Thus, the internal electron donor assisted sulfur cathode delivers excellent electrochemical performance in terms of high reversible capacity (1490 mAh g−1 at 0.5 A g−1), competitive rate performance (1010 mAh g−1 at 4 A g−1), as well as outstanding cycle stability (735 mAh g−1 at 4 A g−1 after 500 cycles).

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Bifunctional electrolyte additive with redox mediation and capacity contribution for sulfur cathode in aqueous Zn-S batteries

Cited by 30 publications

References 40 publications

Minireview on Aqueous Zinc–Sulfur Batteries: Recent Advances and Future Perspectives

Minireview on Aqueous Zinc–Sulfur Batteries: Recent Advances and Future Perspectives

The Rise of Multivalent Metal–Sulfur Batteries: Advances, Challenges, and Opportunities

Internal Electron Donor Accelerated Sulfur Redox for Aqueous Zn─S Batteries

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