A functional separator coated with sulfonated metal–organic framework/Nafion hybrids for Li–S batteries

Kim, Seon Hwa; Yeon, Jeong; Kim, Raekyung; Choi, Kyung Min; Park, Ho Seok

doi:10.1039/c8ta08843h

Cited by 102 publications

(49 citation statements)

References 49 publications

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“…In addition, constructing an interlayer also assists to confine the dissolved polysulfides within the cathode side via physical blocking, chemical adsorption, or electrostatic repulsion. 32 − 34 …”

Section: Introductionmentioning

confidence: 99%

A Perspective toward Practical Lithium–Sulfur Batteries

et al. 2020

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Lithium–sulfur (Li–S) batteries have long been expected to be a promising high-energy-density secondary battery system since their first prototype in the 1960s. During the past decade, great progress has been achieved in promoting the performances of Li–S batteries by addressing the challenges at the laboratory-level model systems. With growing attention paid to the application of Li–S batteries, new challenges at practical cell scales emerge as the bottleneck. In this Outlook, the key parameters for practical Li–S batteries to achieve practical high energy density are emphasized regarding high-sulfur-loading cathodes, lean electrolytes, and limited excess anodes. Subsequently, the key scientific problems are redefined in practical Li–S batteries beyond the previous ones under ideal conditions. Finally, viable strategies are proposed to address the above challenges as future research directions.

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Section: Introductionmentioning

confidence: 99%

A Perspective toward Practical Lithium–Sulfur Batteries

et al. 2020

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“…As shown the Nyquist plots of ZABs using CoO/N‐rGO catalyst and Pt/C and RuO 2 mixed catalyst (see Figure S13), the ZAB with the CoO/N‐rGO exhibited lower equivalent series resistance (ESR) of 2.68 Ω than 3.09 Ω with Pt/C and RuO 2 mixed catalyst. The charge transfer resistance ( R ct ) of the cell with CoO/N‐rGO was 3.68 Ω, lower than 3.69 Ω with Pt/C and RuO 2 mixed catalyst, 33 which is associated with the fast charge transfer of the former as confirmed by low VB.…”

Section: Resultsmentioning

confidence: 86%

Bifunctional mesoporous CoO/nitrogen‐incorporated graphene electrocatalysts for high‐power and long‐term stability of rechargeable zinc‐air batteries

et al. 2020

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Despite high energy density, low-cost, and ecofriendly, rechargeable Zinc-air batteries (ZABs) suffer from sluggish kinetics stability during oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at the cathode. Herein, we demonstrate CoO nanoparticles anchored on N-doped reduced graphene oxide (CoO/N-rGO) with an excellent bifunctional catalytic activity and stability and facile redox kinetics of ORR and OER for high-performance rechargeable ZABs. The CoO/N-rGO catalysts are featured with the abundant active sites, a large accessible area, and high electrochemical conductivity, which are associated with increased oxygen vacancy surface, reduced valence, and mesoporous architecture. The half-wave potential (E 1/2) and electron transfer number for ORR are 0.79 V and 3.72 at 0.40 V (vs RHE), respectively, while OER potential at 10 mA cm −2 (E j = 10) is 1.61 V (vs RHE). Remarkably, the ZAB cell with CoO/N-rGO achieves high specific capacity of 545 mAh g zn −1 , power density of 41 mW cm −2 , and cyclic stabilities with high energy efficiency of 64.44% at 2 mA cm −2. In addition, postmortem analysis validates that the oxidation and aggregation of CoO/N-rGO catalyst is mitigated while the inactivation of Zn anode is inhibited.

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“…Therefore, a high capacity of 1588 mAh g −1 can be obtained at 0.2 C, and a 36.2% higher capacity retention can be obtained in LSBs compared with batteries with commercial separators for the first 100 cycles. Park group synthesized a functional separator by applying the vacuum filtering of MOF and Nafion on a PE membrane [ 143 ]. Zr 6 O 4 (OH) 4 (BDC) 6 (BDC = 1,4-benzenedicarboxylate), termed as UiO-66, was used as the MOF.…”

Section: Real Cases Of Modifying Separators For Li-metal Based Batmentioning

confidence: 99%

A Review of Functional Separators for Lithium Metal Battery Applications

et al. 2020

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Lithium metal batteries are considered “rough diamonds” in electrochemical energy storage systems. Li-metal anodes have the versatile advantages of high theoretical capacity, low density, and low reaction potential, making them feasible candidates for next-generation battery applications. However, unsolved problems, such as dendritic growths, high reactivity of Li-metal, low Coulombic efficiency, and safety hazards, still exist and hamper the improvement of cell performance and reliability. The use of functional separators is one of the technologies that can contribute to solving these problems. Recently, functional separators have been actively studied and developed. In this paper, we summarize trends in the research on separators and predict future prospects.

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A functional separator coated with sulfonated metal–organic framework/Nafion hybrids for Li–S batteries

Abstract: A functional separator is designed to improve the utilization of sulfur and to inhibit polysulfide shuttling for high performance lithium–sulfur (Li–S) batteries.

Cited by 102 publications

References 49 publications

A Perspective toward Practical Lithium–Sulfur Batteries

A Perspective toward Practical Lithium–Sulfur Batteries

Bifunctional mesoporous CoO/nitrogen‐incorporated graphene electrocatalysts for high‐power and long‐term stability of rechargeable zinc‐air batteries

A Review of Functional Separators for Lithium Metal Battery Applications

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