In Situ Reconstruction of Electrocatalysts for Lithium–Sulfur Batteries: Progress and Prospects

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(33)

Published: May 1, 2023

Abstract The current research of Li–S batteries primarily focuses on increasing the catalytic activity electrocatalysts to inhibit polysulfide shuttling and enhance redox kinetics. However, stability is largely neglected, given premise that they are stable over extended cycles. Notably, reconstruction during electrochemical reaction process has recently been proposed. Such in situ inevitably leads varied electrocatalytic behaviors, such as sites, selectivity, activity, amounts sites. Therefore, a crucial prerequisite for design highly effective an in‐depth understanding variation active sites influence factors which not achieved fundamental summary. This review comprehensively summarizes recent advances behaviors different process, mainly including metal nitrides, oxides, selenides, fluorides, metals/alloys, sulfides. Moreover, unexplored issues major challenges chemistry summarized prospected. Based this review, new perspectives offered into true batteries.

Language: Английский

---

Precisely optimizing polysulfides adsorption and conversion by local coordination engineering for high-performance Li-S batteries

Nano Energy, Journal Year: 2023, Volume and Issue: 110, P. 108353 - 108353

Published: March 15, 2023

Language: Английский

---

Chemomechanics Engineering Promotes the Catalytic Activity of Spinel Oxides for Sulfur Redox Reaction

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: May 13, 2024

Abstract Cooperative catalysis is a promising approach to enhance the sluggish redox kinetics of lithium polysulfides (LiPSs) for practical lithium–sulfur (Li–S) batteries. However, elusory synergistic effect among multiple active sites makes it challenging accurately customize electronic structure catalysts. Herein, strategy precisely tailoring e g orbitals spinel oxides through chemomechanics engineering porposed regulate LiPSs retention and catalysis. By manipulating regulable cations in Mn x Co 3‐ O 4 , theoretically experimentally revealed that lattice strain induced by Jahn–Teller high‐spin 3+ at octahedral (Oh) can increase occupancy low‐spin Oh which effectively regulates chemical affinity toward establishes an unblocked channel intrinsic charge transfer. This leads volcano‐type correlation between sulfur activity. Benefitting from cooperative dual‐active sites, MnCo 2 with average 0.45 affords most appropriate adsorption strength rapid LiPSs, leading remarkable rate performance capacity assembled Li–S work demonstrates promise optimizing achieve efficient

Language: Английский

---

Valence Electron: A Descriptor of Spinel Sulfides for Sulfur Reduction Catalysis

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Abstract Catalysts are essential for achieving high‐performance lithium–sulfur batteries. The precise design and regulation of catalytic sites to strengthen their efficiency robustness remains challenging. In this study, spinel sulfides catalyst principles through element doping investigated. This research highlights the distinct role lattice sulfur in lithium polysulfide conversion emphasizes differences activity between metal anion sites. valence electron model as a descriptor can characterize performance, guiding (FeCo) 3 (PS) 4 co‐doped with cation anion. exhibits highest performance among catalysts data, particularly under high loading conditions. It achieves an initial specific capacity 1205.9 mAh g −1 (6.1 cm −2 ) at 5 mg 1192.7 (11.9 10 , demonstrating excellent electrocatalytic performance.

Language: Английский

---

Self-recovery catalysts of ZnIn2S4@In2O3 heterostructures with multiple catalytic centers for cascade catalysis in lithium−sulfur battery

Nano Energy, Journal Year: 2023, Volume and Issue: 119, P. 109078 - 109078

Published: Nov. 8, 2023

Language: Английский

---

Designing metal sulfide-based cathodes and separators for suppressing polysulfide shuttling in lithium-sulfur batteries

Nano Research, Journal Year: 2023, Volume and Issue: 17(4), P. 2574 - 2591

Published: Nov. 3, 2023

Language: Английский

---

Alveoli‐Inspired Carbon Cathodes with Interconnected Porous Structure and Asymmetric Coordinated Vanadium Sites for Superior Li−S Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(25)

Published: April 16, 2024

Accelerating sulfur conversion catalysis to alleviate the shuttle effect has become a novel paradigm for effective Li-S batteries. Although nitrogen-coordinated metal single-atom (M-N

Language: Английский

---

Electrochemical Restructuring Driven Catalytic Cycle of Bi-Based Heterojunctions for High-Performance Lithium–Sulfur Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(20), P. 12795 - 12807

Published: May 8, 2024

Restructuring is an important phenomenon in catalytic reactions. Conversion-type materials with suitable redox potential may undergo situ electrochemically driven restructurings and induce highly active sites a working lithium–sulfur battery. Herein, by the electrochemical conversion reaction of BiVO4, reversible cycle Bi/amorphous Li3VO4 (a-Li3VO4) Bi2S3/a-Li3VO4 heterojunctions constructed, which targets oxidation Li2S polysulfide, respectively. The heterostructures size confinement provide abundant for shuttle restraining sulfur conversion. Especially, p-block Bi Bi2S3 could dramatically reduce energy barriers polysulfide virtue p–p orbital hybridization, promoting bidirectional reactions cathode. As result, corresponding cathode possesses high capacity 7.5 mAh cm–2 after 120 cycles under loading 10.3 mg current density 0.38 mA cm–2. This study furnishes feasible scheme to obtain effective catalysts utilizing induced restructuring.

Language: Английский

---

Mastering Surface Sulfidation of MnP‐MnO₂ Heterostructure to Facilitate Efficient Polysulfide Conversion in Li─S Batteries

Advanced Science, Journal Year: 2024, Volume and Issue: 11(32)

Published: June 24, 2024

Abstract The development of lithium–sulfur (Li─S) batteries has been hampered by the shuttling effect lithium polysulfides (LiPSs). An effective method to address this issue is use an electrocatalyst accelerate catalytic conversion LiPSs. In study, heterogeneous MnP‐MnO 2 nanoparticles are uniformly synthesized and embedded in porous carbon (MnP‐MnO /C) as core catalysts improve reaction kinetics situ characterization density functional theory (DFT) calculations confirm that heterostructure undergo surface sulfidation during charge/discharge process, forming MnS phase. Surface catalyst significantly accelerated SRR Li S activation, effectively inhibiting LiPSs effect. Consequently, /C@S cathode achieves outstanding rate performance (10 C, 500 mAh g −1 ) ultrahigh cycling stability (0.017% decay per cycle for 2000 cycles at 5 C). A pouch cell with delivers a high energy 429 Wh kg . This study may provide new approach investigating electrocatalysts, which valuable advancing high‐energy‐density Li−S batteries.

Language: Английский

---

Surface Electron Reconstruction of Catalyst Through Alloying Strategy for Accelerating Sulfur Conversion in Lithium‐Sulfur Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: May 28, 2024

Abstract Alloy catalyst is considered to be an important strategy solve the shuttle effect and sluggish kinetics of lithium‐sulfur batteries (LSBs). However, electronic structure alloy on sulfur conversion process has not been effectively analyzed. In this paper, based alloying strategy, such a FeCoNi regulated optimized, adsorption configuration catalytic are defined. The in situ Raman spectroscopy density functional theory (DFT) employed deeply understand mechanism conversion. A cell with modified separator delivers ultra‐low capacity attenuation 0.056% per cycle over 1000 cycles at 3 C. outstanding anti‐self‐discharge performance 8.1% 7 days also achieved. Furthermore, obtained high loading 9.7 mg cm −2 lean electrolyte 5.6 µL s −1 exhibits 81% retention after 100 cycles, providing research prospect for practical application batteries.

Language: Английский

---