Sulfite-Based Electrolyte Chemistry with Ion–Dipole Interactions and Robust Interphase Achieves Wide-Temperature Sodium-Ion Batteries DOI
Haojie Liang,

Wen-Yu Qian,

Han‐Hao Liu

и другие.

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

Опубликована: Май 17, 2025

Currently, ether- and carbonate-based electrolytes have been extensively studied for applications in harsh conditions; however, it is difficult to develop a suitable electrolyte system that compatible with both high low temperatures. Herein, the first time, cyclic sulfite-based formulated successfully achieve wide-temperature operation of sodium-ion batteries (SIBs) from -60 60 °C. By precisely modulating ion-dipole interactions, dominant ion coordination states are screened directionally accelerate desolvation process simultaneously maintain sufficient electrostatic constraints, laying foundation high- low-temperature compatibility. And coordinated anions additives synergistically decompose enable inorganic-rich interphases robustness favorable diffusion, extending voltage window temperature range. As result, Na3V2(PO4)2O2F demonstrates 58 mA h g-1 at -50 °C while stably cycling 300 cycles 80% capacity retention. Additionally, Na3V2(PO4)3 NaFe1/3Ni1/3Mn1/3O2 cathodes also exhibit discharge specific capacities 50 65 Eventually, Ah-class pouch cell displays 0.64 A 56% retention -40 In short, introduced formulation enhances wide SIBs, shedding light on development all-weather systems.

Язык: Английский

Cation–Anion Regulation Engineering in a Flame-Retardant Electrolyte toward Safe Na-Ion Batteries with Appealing Stability DOI
Yi‐Hu Feng,

Chengye Lin,

Hui-Huan Qin

и другие.

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

Опубликована: Май 1, 2025

Great electrochemical stability and intrinsic safety are of critical significance in realizing large-scale applications Na-ion batteries (NIBs). Unfortunately, the notorious decomposition electrolyte undesirable side reactions on cathode-electrolyte interphase (CEI) pose major obstacles to practical implementation NIBs. Besides, flammability traditional carbonate-based electrolytes raises increasing concerns about batteries. Herein, a flame-retardant all-fluorinated is proposed achieve an anion-aggregated inner solvation shell by modulating cation-anion interactions through low-coordination number cosolvent. The more electrochemically antioxidant fluorinated solvents anion-dominated interfacial chemistry contribute construction both mechanically chemically stable F-rich CEI. Such thin, homogeneous effectively inhibits parasitic reaction, strengthens stability, enables fast Na+ diffusion kinetics interface. When employing this electrolyte, Na0.95Ni0.4Fe0.15Mn0.3Ti0.15O2 (NFMT) cathode delivers remarkable discharge capacity up 169.7 mAh g-1, with cycling at 1C for 500 cycles. Impressively, NFMT//hard carbon pouch cells such also steady operation 100 cycles 0.5C 86.8% remaining. This study offers reference developing high-performance electrolytes.

Язык: Английский

Процитировано

0
In Situ Polymerization Enhances Anion Solvation Structure for Stable High‐Temperature Cycling in Quasi‐Solid‐State Sodium Metal Batteries DOI Creative Commons
Ziyong Li, Yuxuan Liu, Binghao Zhang

и другие.

SusMat, Год журнала: 2025, Номер unknown

Опубликована: Май 6, 2025

ABSTRACT While sodium metal batteries (SMBs) possess remarkable superiority for next‐generation energy storage systems, interfacial reactions, and dendrite growth due to the dissolution of solid electrolyte interphase (SEI) have seriously hindered large‐scale application SMBs, especially at high temperatures. Here, a vinyl ethylene carbonate‐based quasi‐solid (PVEC‐QSPE) capable enhancing high‐temperature stability Na anodes is successfully synthesized by in situ curing oligomeric poly(vinyl carbonate) (PVEC). The increased steric hindrance PVEC reduces coordination ability C═O toward + , which promotes cooperative migration with anions decomposition form SEI. Furthermore, PVEC‐QSPE significantly SEI, contains more organic components fewer inorganic components, thereby minimizing release gases including CO 2 inhibiting dendrites. stable interface between helps Na|PVEC‐QSPE|Na 3 V (PO 4 ) (NVP) operate stably temperatures, whose capacity retention rate reaches 80% 80°C 93.3% 60°C after 3000 cycles employing 10 C. This work provides an efficient strategy solve problems unstable SEI growth, promoting development safe practical SMBs.

Язык: Английский

Процитировано

0
Constructing Dissolution–Resistant Interphases for Long‐Life Sodium‐Ion Batteries at Elevated Temperatures DOI Creative Commons
Wen‐Ting Deng, Xiaofan Du, Gaojie Xu

и другие.

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

Abstract Rechargeable sodium‐ion batteries (SIBs) utilizing NaPF 6 ‐carbonate electrolytes consistently exhibit unsatisfactory cycle life at elevated temperatures, posing a significant challenge for their large‐scale commercialization. This is mainly caused by the instability of interphase layers especially high solubility components (especially NaF) in carbonate solvents. In this study, novel additive sodium difluorobis(oxalato) phosphate (NaDFBOP) synthesized and introduced into to enhance commercial SIBs composed NaNi 1/3 Fe Mn O 2 (NFM) cathode hard carbon (HC) anode, particularly 50 °C. Specifically, NaDFBOP enables NFM/HC retain 85.45% initial capacity after 1000 cycles 30 °C 90.76% 500 Theoretical calculations reveal that DFBOP⁻ anions enter first solvation shell Na + , exhibits strong propensity decomposition. Characterizations suggest favors formation dissolution–resistant robust enriched dissolution‐resistant oxalate‐containing species inorganic NaF, which have mutual binding energy. work underscores critical importance designing functional additives constructing interphases temperature SIBs.

Язык: Английский

Процитировано

0
Zirconium Modification Induced Small‐Polaron Breakdown in Na4Fe3(PO4)2P2O7 as Superior Cathode in Sodium‐Ion Battery DOI
Hongmei Dai, Zhenning Yang,

Tingting Xie

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 15, 2025

Abstract Na₄Fe₃(PO₄)₂(P₂O₇) (NFPP) is a promising cathode material for sodium‐ion batteries (SIBs) due to its low cost, facile synthesis, environmental compatibility, high structural stability, and suitable operating voltage. However, practical application hindered by poor cycling limited rate capability, electronic/ionic conductivity. Herein, these challenges are addressed strategically incorporating Zr⁴⁺ ions at the Fe1 site of NFPP (denoted as NZFPP‐X, where X represents Zr/Fe ratio). The optimized NZFPP‐0.05 exhibits significantly enhanced thermodynamic stability electrochemical performance. Zr substitution induces depolarization effects, which promote electron mobility, thereby improving conductivity, Specifically, delivers an exceptional capacity retention 86.6% after 6000 cycles 10 C remarkable capability 58.5 mAh g⁻¹ 50 C. These advancements attributed reduced energy barrier accelerated kinetics compared pristine NFPP. This work presents novel Zr‐substitution strategy enhance performance cathodes introduces cost‐effective, ultra‐stable, high‐rate SIBs.

Язык: Английский

Процитировано

0
Sulfite-Based Electrolyte Chemistry with Ion–Dipole Interactions and Robust Interphase Achieves Wide-Temperature Sodium-Ion Batteries DOI
Haojie Liang,

Wen-Yu Qian,

Han‐Hao Liu

и другие.

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

Опубликована: Май 17, 2025

Currently, ether- and carbonate-based electrolytes have been extensively studied for applications in harsh conditions; however, it is difficult to develop a suitable electrolyte system that compatible with both high low temperatures. Herein, the first time, cyclic sulfite-based formulated successfully achieve wide-temperature operation of sodium-ion batteries (SIBs) from -60 60 °C. By precisely modulating ion-dipole interactions, dominant ion coordination states are screened directionally accelerate desolvation process simultaneously maintain sufficient electrostatic constraints, laying foundation high- low-temperature compatibility. And coordinated anions additives synergistically decompose enable inorganic-rich interphases robustness favorable diffusion, extending voltage window temperature range. As result, Na3V2(PO4)2O2F demonstrates 58 mA h g-1 at -50 °C while stably cycling 300 cycles 80% capacity retention. Additionally, Na3V2(PO4)3 NaFe1/3Ni1/3Mn1/3O2 cathodes also exhibit discharge specific capacities 50 65 Eventually, Ah-class pouch cell displays 0.64 A 56% retention -40 In short, introduced formulation enhances wide SIBs, shedding light on development all-weather systems.

Язык: Английский

Процитировано

0