Understanding the Curvature Effect of FeCo Nanoalloy Encapsulated by Nitrogen‐Doped Carbon Nanotubes for High‐Performance Lithium–Sulfur Batteries DOI Open Access

Mengjing Jin,

Guowen Sun, Muxuan Li

и другие.

Small, Год журнала: 2024, Номер unknown

Опубликована: Дек. 23, 2024

Abstract Well‐designed structures of the electrocatalyst provide excellent catalytic activity and high structural stability during sulfur reduction reaction Lithium–sulfur batteries (LSBs). In this study, a novel efficient structure is developed to encapsulate bimetallic FeCo nanoalloy catalysts within N‐doped carbon nanotube (NCNT) on nanofibers (FeCo@NCNT/CNFs) using combination electrospinning rapid‐cooling techniques. The NCNT matrix with abundant sites not only serves as pathway for electron transport reaction, but its encapsulation also acts armor protect nanoalloy. Further, curvature effect FeCo@NCNT facilitates greater transfer from NCNT, lowering barrier liquid–solid conversion process. As result, S/FeCo@NCNT/CNFs cathode can achieve exceptional cycle performance 500 cycles at 5 C, an ultra‐low capacity fade rate 0.031% per cycle. Moreover, even under extreme temperature conditions −20 80 °C, battery still delivers specific 827.16 697.46 mAh g −1 1 C. This work shows effective insight into enhancing LiPS kinetics over wide range in Li–S batteries.

Язык: Английский

Physical Field Effects to Suppress Polysulfide Shuttling in Lithium–Sulfur Battery DOI
Junan Feng, Chuan Shi, Xiaoxian Zhao

и другие.

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 14, 2024

Lithium-sulfur batteries (LSB) with high theoretical energy density are plagued by the infamous shuttle effect of lithium polysulfide (LPS) and sluggish sulfur reduction/evolution reaction. Extensive research is conducted on how to suppress effects, including physical structure confinement engineering, chemical adsorption strategy, design redox catalysts. Recently, rational mitigate effects enhance reaction kinetics based field has been widely studied, providing a more fundamental understanding interactions species. Herein, focused their methods mechanisms interaction summarized systematically LPS. Overall, working principle LSB system, origin effect, kinetic trouble in briefly described. Then, mechanism application materials concepts external field-assisted elaborated, electrostatic force, built-in electric field, spin state regulation, strain magnetic photoassisted other strategies pivotally elaborated discussed. Finally, potential directions enhancing performance weakening high-energy anticipated.

Язык: Английский

Процитировано

18
Metal Doping Activation of Anion-Mediated Electron Transfer in Catalytic Reactions DOI
Chaoyue Zhang, Jing Yu, Chenyang Huang

и другие.

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

Heteroatom-doping has emerged as a transformative approach to producing high-performance catalysts, yet the current trial-and-error optimize these materials remains ineffective. To enable rational design of more efficient models grounded in deeper understanding catalytic mechanisms are essential. Existing models, such d-band center theory, fall short explaining role dopants, particularly when dopants do not directly interact with reactants. In this study, we synthesize various heteroatom-doped catalysts explore correlation between electronic effects and catalyst activity. Using Co-MoS2 model Li–S redox reaction within cathode batteries test system, show interaction cobalt sites adjacent lattice sulfur atoms disrupts intrinsic structural symmetry MoS2. This disruption enhances transfer spin-polarized electrons from metal centers promotes adsorption reactant intermediates. Furthermore, by analyzing 20 different dopant elements, establish linear relationship electron density activity toward reduction species, that extends other systems, hydrogen evolution reaction.

Язык: Английский

Процитировано

2
Boosting Polysulfide Conversion on Fe‐Doped Nickel Diselenide Toward Robust Lithium–Sulfur Batteries DOI Open Access
Junshan Li, Jing Yu, Yong Cai Zhang

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

Abstract Sulfur offers a high‐energy‐density, low‐cost, and sustainable alternative to traditional battery cathodes, but its practical use is limited by sluggish uneven reaction polysulfide dissolution, necessitating electrocatalytic additives enhance conversion efficiency. Generating unpaired spin electrons has proven effective in enhancing performance Co‐based electrocatalysts. These increase adsorption weakening S─S bonds, facilitating their cleavage during sulfur reduction reactions. This work extends the strategy Fe–Ni‐based catalysts. The synthesis of NiSe 2 Fe‐doped particles reported investigate impact Fe doping on electronic structure, catalytic activity, introduced as coating cathode side Li–S (LSB) separator. Experimental analyses first‐principles calculations reveal that Fe‐rich cores surface density states at Fermi level introduce electrons, boosting LiPS conversion. synergistic effects significantly improve performance, cycling stability, overall LSB cells. Specifically, cells based ‐based separators achieve specific capacities 1483 mAh g⁻¹ 0.1C 1085 1C, along with remarkable retaining 84.4% capacity after 800 cycles. High sulfur‐loading tests further validate multifunctional membrane's effectiveness, showing significant retention reduced loss.

Язык: Английский

Процитировано

2
Are Sulfide‐Based Solid‐State Electrolytes the Best Pair for Si Anodes in Li‐Ion Batteries? DOI
Qing Sun, Guifang Zeng, Xiao Xu

и другие.

Advanced Energy Materials, Год журнала: 2024, Номер 14(40)

Опубликована: Авг. 19, 2024

Abstract The integration of Si‐based anodes within sulfide‐based solid electrolyte (SSE) Li‐ion batteries (LIB) has emerged as a promising avenue research and development, attracting increasing interest in recent years. This work comprehensively examines the latest directions major strides this field. It covers key advances design engineering nano‐ micro‐structured Si anode architectures, strategies surface modification. Additionally, it explores impacts external pressure, role binders conductive additives, implications varying particle size. Beyond providing detailed account evolution SSE LIBs, also identifies critical challenges that urgently need addressing. These include electrochemical‐mechanical behavior failure mechanism for structural interface modifications, methods preparing electrodes, advancements high‐performance SSEs, development scalable technologies thin films. Moreover, discusses high‐energy cathodes tailored LIBs. identified priorities are set to offer crucial guidance insights, supporting ongoing investigations innovations dynamic area research.

Язык: Английский

Процитировано

10
Optimizing Electron Modulation Induced by the Interfacial Coupling in Cu3P‐Cu2O Heterostructures to Enhance Polysulfide Conversion DOI Open Access

Jinliang Zhu,

Yulin Xian,

Fengxing Liang

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 11, 2025

Abstract Electrocatalysts can inhibit the shuttling of lithium polysulfides (LiPSs) in Li–S batteries by enabling catalytic conversion LiPSs. In this research, heterogeneous Cu 3 P‐Cu 2 O nanoparticles anchored on porous carbon network (Cu O/PC) are investigated to stimulate reaction kinetics LiPSs conversion. At heterojunction interface, high electron density measured functional theory energizes transfer, anchoring The strong interfacial coupling effect generated heterostructure endows active sites with promoted adsorption capability. improved sulfur reduction and Li S activation suppress shuttling. Remarkably, cells equipped O/PC@S cathode marked capacity 1254.3 mAh g −1 at 0.2C ultrahigh cycling stability (0.021% decay rate per cycle after 1200 cycles 4C). Considering practical applications, cathode‐based pouch cell exhibited an initial specific 1069.5 a energy 378.8 Wh kg . This work established pathway for regulating through copper‐based catalysts, exhorting design highly efficient catalysts batteries.

Язык: Английский

Процитировано

1
Mechanistic Insights and Technical Challenges in Sulfur-Based Batteries: A Comprehensive In Situ/Operando Monitoring Toolbox DOI Creative Commons
Jing Yu,

Ivan Pinto‐Huguet,

Chaoyue Zhang

и другие.

ACS Energy Letters, Год журнала: 2024, Номер 9(12), С. 6178 - 6214

Опубликована: Дек. 4, 2024

Batteries based on sulfur cathodes offer a promising energy storage solution due to their potential for high performance, cost-effectiveness, and sustainability. However, commercial viability is challenged by issues such as polysulfide migration, volume changes, uneven phase nucleation, limited ion transport, sluggish redox kinetics. Addressing these challenges requires insights into the structural, morphological, chemical evolution of phases, associated changes internal stresses, diffusion within battery. Such can only be obtained through real-time reaction monitoring battery's operational environment, supported molecular dynamics simulations advanced artificial intelligence-driven data analysis. This review provides an overview

Язык: Английский

Процитировано

4
Enhanced Lithium Polysulfide Adsorption and Reaction with Cobalt-Doped Spinel Additives for Robust Lithium-Sulfur Batteries DOI
Jesús Chacón‐Borrero,

Xuede Qi,

Xuesong Zhang

и другие.

Energy storage materials, Год журнала: 2025, Номер unknown, С. 104207 - 104207

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0
Rapid electron transfer in Co0.85Se-MoSe2/NCP heterostructure catalyst towards robust lithium-sulfur batteries DOI

Xuede Qi,

Chaoyue Zhang, Jing Yu

и другие.

Journal of Energy Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0
Programmable Solid Electrolyte Interphase Enables Simultaneous Optimization of Electrochemical Performance and Self‐Discharge of Lithium Sulfur Batteries under Practical Conditions DOI
Yiyang Li, Huan Liang, Junling Guo

и другие.

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 18, 2025

Abstract The development of lithium–sulfur batteries is impeded by their suboptimal electrochemical performance and significant self‐discharge under practical conditions, especially at high sulfur‐to‐host ratios low electrolyte‐to‐sulfur ratios. Under these improving necessitates accelerating the polysulfides conversion, while reducing entails inhibiting same conversion (disproportionation reaction, a key contributor to self‐discharge). Herein, address this challenging contradiction, an imprisoning strategy designed that utilizes programmable solid electrolyte interphase (SEI) layers formed only on outer surface TiO 2−x coated hollow carbon spheres (TiO @C). @C chosen primarily because it supports regulated SEI growth upon simple voltage control, leveraging different formation potential C, its conductivity catalytic property ensure sulfur reaction kinetics. This functions effectively even conditions. exposed internal provides abundant effective sites (as dense barrier) prevents from migrating out spheres, performance. These soluble polysulfides, being confined within easily reach saturation concentrations during storage, disproportionation reaction. Consequently, wrapped @C/sulfur cathodes exhibit both self‐discharge. work new attempt achieve above simultaneous optimization without compromise.

Язык: Английский

Процитировано

0
Understanding the Curvature Effect of FeCo Nanoalloy Encapsulated by Nitrogen‐Doped Carbon Nanotubes for High‐Performance Lithium–Sulfur Batteries DOI Open Access

Mengjing Jin,

Guowen Sun, Muxuan Li

и другие.

Small, Год журнала: 2024, Номер unknown

Опубликована: Дек. 23, 2024

Abstract Well‐designed structures of the electrocatalyst provide excellent catalytic activity and high structural stability during sulfur reduction reaction Lithium–sulfur batteries (LSBs). In this study, a novel efficient structure is developed to encapsulate bimetallic FeCo nanoalloy catalysts within N‐doped carbon nanotube (NCNT) on nanofibers (FeCo@NCNT/CNFs) using combination electrospinning rapid‐cooling techniques. The NCNT matrix with abundant sites not only serves as pathway for electron transport reaction, but its encapsulation also acts armor protect nanoalloy. Further, curvature effect FeCo@NCNT facilitates greater transfer from NCNT, lowering barrier liquid–solid conversion process. As result, S/FeCo@NCNT/CNFs cathode can achieve exceptional cycle performance 500 cycles at 5 C, an ultra‐low capacity fade rate 0.031% per cycle. Moreover, even under extreme temperature conditions −20 80 °C, battery still delivers specific 827.16 697.46 mAh g −1 1 C. This work shows effective insight into enhancing LiPS kinetics over wide range in Li–S batteries.

Язык: Английский

Процитировано

0