Advances in the Development of Single‐Atom Catalysts for High‐Energy‐Density Lithium–Sulfur Batteries

Advanced Materials, Год журнала: 2022, Номер 34(30)

Опубликована: Март 3, 2022

Abstract Although lithium–sulfur (Li–S) batteries are promising next‐generation energy‐storage systems, their practical applications limited by the growth of Li dendrites and lithium polysulfide shuttling. These problems can be mitigated through use single‐atom catalysts (SACs), which exhibit advantages maximal atom utilization efficiency (≈100%) unique catalytic properties, thus effectively enhancing performance electrode materials in devices. This review systematically summarizes recent progress SACs intended for Li‐metal anodes, S cathodes, separators, briefly introducing operating principles Li–S batteries, action mechanisms corresponding SACs, fundamentals activity, then comprehensively describes main strategies synthesis. Subsequently, operation reinforced as well other metal–S individually illustrated, major challenges usage future development directions presented.

Язык: Английский

---

Covalent organic frameworks for photocatalysis: Synthesis, structural features, fundamentals and performance

Coordination Chemistry Reviews, Год журнала: 2022, Номер 475, С. 214889 - 214889

Опубликована: Окт. 15, 2022

Язык: Английский

---

Metalated covalent organic frameworks: from synthetic strategies to diverse applications

Chemical Society Reviews, Год журнала: 2022, Номер 51(15), С. 6307 - 6416

Опубликована: Янв. 1, 2022

This review highlights the recent advances of metalated covalent organic frameworks, including synthetic strategies and applications, discusses current challenges future directions.

Язык: Английский

---

Recent Progress for Concurrent Realization of Shuttle‐Inhibition and Dendrite‐Free Lithium–Sulfur Batteries

Advanced Materials, Год журнала: 2023, Номер 35(32)

Опубликована: Март 24, 2023

Lithium-sulfur (Li-S) batteries have become one of the most promising new-generation energy storage systems owing to their ultrahigh density (2600 Wh kg-1 ), cost-effectiveness, and environmental friendliness. Nevertheless, practical applications are seriously impeded by shuttle effect soluble lithium polysulfides (LiPSs), uncontrolled dendrite growth metallic Li, which result in rapid capacity fading battery safety problems. A systematic comprehensive review cooperative combination tackling fundamental problems terms cathode anode synchronously is still lacking. Herein, for first time, strategies inhibiting behavior dendrite-free Li-S simultaneously summarized classified into three parts, including "two-in-one" S-cathode Li-anode host materials toward full cell, "two birds with stone" modified functional separators, tailoring electrolyte stabilizing sulfur electrodes. This also emphasizes chemistry mechanism catalyst principles improving electrochemical performance; advanced characterization technologies monitor real-time LiPS evolution discussed detail. The problems, perspectives, challenges respect issues as well application proposed.

Язык: Английский

---

Covalent Organic Framework Based Lithium–Sulfur Batteries: Materials, Interfaces, and Solid‐State Electrolytes

Advanced Energy Materials, Год журнала: 2023, Номер 13(10)

Опубликована: Янв. 20, 2023

Abstract Lithium–sulfur batteries are recognized as one of the most promising next‐generation energy‐storage technologies owing to their high energy density and low cost. Nevertheless, shuttle effect polysulfide intermediates formation lithium dendrites principal reasons that restrict practical adoption current Li–S batteries. Adjustable frameworks, structural variety, functional adaptability covalent organic frameworks (COFs) have potential overcome issues associated with battery technology. Herein, a summary is presented emerging COF materials in addressing challenging problems terms sulfur hosts, modified separators, artificial solid electrolyte interphase layers, solid‐state electrolytes. This comprehensive overview focuses on design chemistry COFs used upgrade Furthermore, existing difficulties, prospective remedies, research directions for discussed, laying groundwork future advancements this class fascinating materials.

Язык: Английский

---

Designing principles of advanced sulfur cathodes toward practical lithium‐sulfur batteries

SusMat, Год журнала: 2022, Номер 2(1), С. 34 - 64

Опубликована: Янв. 24, 2022

Abstract As one of the most promising candidates for next‐generation energy storage systems, lithium‐sulfur (Li‐S) batteries have gained wide attention owing to their ultrahigh theoretical density and low cost. Nevertheless, road commercial application is still full thorns due inherent sluggish redox kinetics severe polysulfides shuttle. Incorporating sulfur cathodes with adsorbents/catalysts has been proposed be an effective strategy address foregoing challenges, whereas complexity resulting from intricate design parameters greatly influences corresponding density, which frequently ignored. In this review, recent progress in strategies advanced summarized significance compatible regulation among active materials, tailored hosts, elaborate cathode configuration clarified, aiming bridge gap between fundamental research practical Li‐S batteries. The representative classified by encapsulation, host architecture, are first highlighted illustrate synergetic contribution electrochemical performance improvement. Feasible integration principles also guide cathodes. Finally, prospects future directions provided realize high long‐life

Язык: Английский

---

Porous Dithiine-Linked Covalent Organic Framework as a Dynamic Platform for Covalent Polysulfide Anchoring in Lithium–Sulfur Battery Cathodes

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(20), С. 9101 - 9112

Опубликована: Май 11, 2022

Dithiine linkage formation via a dynamic and self-correcting nucleophilic aromatic substitution reaction enables the de novo synthesis of porous thianthrene-based two-dimensional covalent organic framework (COF). For first time, this organo-sulfur moiety is integrated as structural building block into crystalline layered COF. The structure new material deviates from typical planar interlayer π-stacking COF to form undulated layers caused by bending along C-S-C bridge, without loss aromaticity crystallinity overall structure. Comprehensive experimental theoretical investigations model compound, featuring thianthrene moiety, suggest partial delocalization sulfur lone pair electrons over backbone decreasing band gap promoting redox activity. Postsynthetic sulfurization allows for direct attachment polysulfides carbon afford molecular-designed cathode lithium-sulfur (Li-S) batteries with minimized polysulfide shuttle. fabricated coin cell delivers nearly 77% initial capacity even after 500 charge-discharge cycles at mA/g current density. This novel in chemistry an ideal motif designing materials studying advanced electrode Li-S on molecular level.

Язык: Английский

---

Covalent Organic Framework for Rechargeable Batteries: Mechanisms and Properties of Ionic Conduction

Advanced Energy Materials, Год журнала: 2022, Номер 12(20)

Опубликована: Апрель 10, 2022

Abstract Ionic conduction plays a critical role in the process of electrode reactions and charge transfer kinetics rechargeable battery. Covalent organic frameworks (COFs) have emerged as an exciting new class ionic conductors, made great progress terms their application batteries. The unique features COFs, such well‐defined directional channels, functional diversity, structural robustness, endow COF‐based conductors with low diffusion energy barrier excellent temperature tolerance, which are much superior to classic inorganic or polymer conductors. Here, comprehensive analysis summary ion‐conducting behavior presented, design principles for COFs emphasized. Moreover, systematic overview recent development serving electrodes, separators, solid electrolytes, artificial interphase materials diverse battery applications, metal‐ion batteries, lithium metal lithium–sulfur lithium–CO 2 zinc–air etc., is proposed. This review expected provide theoretical guidance novel kinds conductor bearing intrinsic framework structures boost further research enthusiasm

Язык: Английский

---

In Situ Growth of Covalent Organic Framework Nanosheets on Graphene as the Cathode for Long‐Life High‐Capacity Lithium‐Ion Batteries

Advanced Materials, Год журнала: 2022, Номер 34(37)

Опубликована: Июль 29, 2022

The poor electronic and ionic conductivities of covalent organic frameworks (COFs) severely restrict the development COF-based electrodes for practical rechargeable batteries, therefore inspiring more research interest from direction both material synthesis technology. Herein, a dual-porous COF, USTB-6, with good crystallinity rich redox-active sites is conceived fabricated by polymerization 2,3,8,9,14,15-hexa(4-formylphenyl)diquinoxalino [2,3-a:2',3'-c]phenazine 2,7-diaminopyrene-4,5,9,10-tetraone. In particular, heterogeneous same starting materials in presence graphene affords uniformly dispersed COF nanosheets thickness 8.3 nm on conductive carbon substrate, effectively enhancing conductivity electrode. Such graphene-supported USTB-6 cathode when used lithium-ion battery exhibits specific capacity 285 mA h g-1 at current density 0.2 C excellent rate performance prominent 188 10 C. More importantly, 170 retained using after 6000 cycles charge discharge measurement 5

Язык: Английский

---

Conjugated Three-Dimensional High-Connected Covalent Organic Frameworks for Lithium–Sulfur Batteries

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(37), С. 17209 - 17218

Опубликована: Сен. 9, 2022

Developing conjugated three-dimensional (3D) covalent organic frameworks (COFs) still remains an extremely difficult task due to the lack of enough 3D building blocks. Herein, condensation between 8-connected pentiptycene-based D2h block (DMOPTP) and 4-connected square-planar linkers affords two COFs (named 3D-scu-COF-1 3D-scu-COF-2). A combination homoaromatic structure former with 2D latter linking units enables π-electron delocalization over whole both COFs, endowing them excellent conductivities 3.2-3.5 × 10-5 S cm-1. In particular, rigid quadrangular prism shape DMOPTP guides formation a twofold interpenetrated scu topology high-connected permanent porosity large Brunauer-Emmett-Teller (BET) surface area 2340 1602 m2 g-1 for 3D-scu-COF-2, respectively, ensuring effective small molecule storage mass transport characteristics. This, in their good charge properties, renders promising sulfur host materials lithium-sulfur batteries (LSBs) high capacities (1035-1155 mA h at 0.2 C, 1 C = 1675 g-1), rate capabilities (713-757 5.0 C), superior cycling stability (71-83% capacity retention 2.0 after 500 cycles), surpassing most LSB cathodes reported thus far.

Язык: Английский

---