Super‐Ionic Conductor Soft Filler Promotes Li⁺ Transport in Integrated Cathode–Electrolyte for Solid‐State Battery at Room Temperature

Advanced Materials, Год журнала: 2024, Номер 36(27)

Опубликована: Апрель 7, 2024

Abstract Composite polymer solid electrolytes (CPEs), possessing good rigid flexible, are expected to be used in solid‐state lithium‐metal batteries. The integration of fillers into matrices emerges as a dominant strategy improve Li + transport and form ‐conducting electrode–electrolyte interface. However, challenges arise traditional fillers: 1) inorganic fillers, characterized by high interfacial energy, induce agglomeration; 2) organic with elevated crystallinity, impede intrinsic ionic conductivity, both severely hindering migration. Here, concept super‐ionic conductor soft filler, utilizing conductivity nanocellulose (Li‐NC) model, is introduced which exhibits conductivity. Li‐NC anchors anions, enhances speed, assists the cathode–electrolyte electrodes for room temperature tough dual‐channel electrolyte (TDCT) polyvinylidene fluoride (PVDF) demonstrates transfer number (0.79) due synergistic coordination mechanism transport. Integrated electrodes’ design enables stable performance LiNi 0.5 Co 0.2 Mn 0.3 O 2 |Li cells, 720 cycles at C, 88.8% capacity retention. Furthermore, lifespan Li|TDCT|Li cells over 4000 h Li‐rich 1.2 Ni 0.13 0.54 excellent performance, proving practical application potential filler energy density batteries temperature.

Язык: Английский

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Ether-Based High-Voltage Lithium Metal Batteries: The Road to Commercialization

ACS Nano, Год журнала: 2024, Номер 18(16), С. 10726 - 10737

Опубликована: Апрель 11, 2024

Ether-based high-voltage lithium metal batteries (HV-LMBs) are drawing growing interest due to their high compatibility with the Li anode. However, commercialization of ether-based HV-LMBs still faces many challenges, including short cycle life, limited safety, and complex failure mechanisms. In this Review, we discuss recent progress achieved in electrolytes for propose a systematic design principle electrolyte based on three important parameters: electrochemical performance, industrial scalability. Finally, summarize challenges commercial application suggest roadmap future development.

Язык: Английский

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Research Progress and Perspectives on Pre‐Sodiation Strategies for Sodium‐Ion Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 12, 2024

Abstract Sodium‐ion batteries (SIBs) with abundant elements have garnered significant attention from researches as a promise compensation to lithium‐ion (LIBs). However, the large‐scale commercial application of SIBs is partially hindered by limited initial coulombic efficiency (ICE) due irreversible formation solid electrolyte interphase (SEI) and intercalation into defects in anode. Similar pre‐lithiation techniques, pre‐sodiation approaches are considered be one most direct effective way compensate for loss active sodium at anode side during cycle. In this context, additional ions pre‐injected cathode/anode material chemical/electrochemical methods, aiming improve battery span life energy density. This review delves necessity impact compiling latest research progress, instance, self‐sacrificing cathode additives, over‐sodiated materials, contact solution chemical pre‐sodiation. Notably, mechanisms underlying highlighted. comprehensive overview aims foster deeper understanding techniques expects provide guidance realizing high density sodium‐ion batteries.

Язык: Английский

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Designing Electrolytes with Steric Hindrance and Film‐Forming Booster for High‐Voltage Potassium Metal Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(17)

Опубликована: Янв. 2, 2024

Abstract Potassium metal batteries coupling with high‐voltage manganese hexacyanoferrate (MnHCF) cathodes are promising candidates for energy storage devices. Ethers the primary electrolyte solvent reversible potassium anodes, but their poor oxidative stability at high voltage restricts application. Taking advantage of steric hindrance, a dilute (1 m ) non‐fluorinated ether extended alkyl groups is designed to reduce solvation capability K ions, thus suppressing decomposition and tailoring interphase composition on both cathode anode sides. The accompanying viscosity associated long can be readily resolved by incorporating an S‐containing additive, which further boosts 4.6 V. Furthermore, additive contributes S‐rich organic species among interphases that inhibit dissolution induce homogenous deposition through promoted kinetics. Benefiting from stable restricted side reactions, ether‐based enables cycling MnHCF||K cell over 200 cycles Coulombic efficiency 99.4% under negative/positive capacity ratio 4.

Язык: Английский

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Rapid and Up‐Scalable Flash Fabrication of Graphitic Carbon Nanocages for Robust Potassium Storage

Advanced Functional Materials, Год журнала: 2024, Номер 34(32)

Опубликована: Март 13, 2024

Abstract Graphitic carbon nanocages (CNCs) have garnered attention as viable candidates for potassium storage, primarily due to their notable crystallinity, large surface area, and rich porosity. Yet, the development of a rapid, scalable, economically feasible synthesis approach CNCs persists formidable challenge. This study presents rapid (millisecond‐scale) scalable (gram‐scale) method fabricating mesoporous characterized by high purity orderly graphitic structures, utilizing flash Joule heating technique. Employed CNC electrode developed herein exhibits exceptional performance metrics, including initial capacity, rate capability, cycling stability, surpassing numerous carbonaceous materials previously documented. Impressively, it delivers capacity 312.3 mAh g −1 at 0.1 A , maintains 175.1 2.0 retains 219.6 over 1000 cycles 1.0 . Molecular dynamics simulations in situ characterizations are employed elucidate this robust behavior. work underscores significant advantages technique synthesizing storage applications.

Язык: Английский

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Carbonate Ester‐Based Sodium Metal Battery with High‐Capacity Retention at −50°C Enabled by Weak Solvents and Electrodeposited Anode

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Июль 11, 2024

Sodium metal batteries (SMBs) have received increasing attention due to the abundant sodium resources and high energy density, but suffered from sluggish interfacial kinetic unstable plating/stripping of anode at low temperature, especially when matched with ester electrolytes. Here, we develop a stable ultra-low-temperature SMBs high-capacity retention -50 °C in weak solvated carbonate ester-based electrolyte, combined an electrodeposited Na (Cu/Na) anode. The Cu/Na electrochemically activated "deposited sodium" inorganic-rich solid electrolyte interphase (SEI) is favor for fast

Язык: Английский

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Strategies to enable microsized alloy anodes for high-energy and long-life alkali-ion batteries

Industrial Chemistry and Materials, Год журнала: 2024, Номер 2(4), С. 489 - 513

Опубликована: Янв. 1, 2024

In this review, challenges and strategies to enable the use of micro-sized alloy anodes for alkali-ion batteries with high energy density long cycle life are explored.

Язык: Английский

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Multiphase Riveting Structure for High Power and Long Lifespan Potassium‐Ion Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(26)

Опубликована: Фев. 26, 2024

Abstract The development of potassium‐ion batteries (KIBs) relies on the exploration stable layer‐structured oxide cathode materials and a comprehensive understanding ion storage diffusion behaviors. A multiphase riveting‐structured O3/P2/P3‐Na 0.9 [Ni 0.3 Mn 0.55 Cu 0.1 Ti 0.05 ]O 2 (Tri‐NMCT) is employed as material for KIBs. It demonstrates an initial discharge specific capacity 108 mA g −1 at current density 15 in voltage range 1.5–4 V. Excellent cyclic stability exhibited well with high 83% retention after 600 cycles higher 300 . Based in‐situ XRD, it reveals that P2 phase offers more triangular prism site compared to O3 phase. This inhibits undesired transition from P3 during discharge, thereby ensuring long‐term performance. Furthermore, Density state (DOS) calculations migration barrier analyses indicate preferential K + ions due lower Fermi level. observation elucidates structural preservation embedding. Overall, this work sheds light Tri‐NMCT promising advanced

Язык: Английский

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Chloro‐Functionalized Ether‐Based Electrolyte for High‐Voltage and Stable Potassium‐Ion Batteries

Angewandte Chemie, Год журнала: 2024, Номер 136(23)

Опубликована: Апрель 10, 2024

Abstract Ether‐based electrolyte is beneficial to obtaining good low‐temperature performance and high ionic conductivity in potassium ion batteries. However, the dilute ether‐based electrolytes usually result ion‐solvent co‐intercalation of graphite, poor cycling stability, hard withstand voltage cathodes above 4.0 V. To address aforementioned issues, an electron‐withdrawing group (chloro‐substitution) was introduced regulate solid‐electrolyte interphase (SEI) enhance oxidative stability electrolytes. The (~0.91 M) chloro‐functionalized not only facilitates formation homogeneous dual halides‐based SEI, but also effectively suppress aluminum corrosion at voltage. Using this functionalized electrolyte, K||graphite cell exhibits a 700 cycles, K||Prussian blue (PB) (4.3 V) delivers 500 PB||graphite full‐cell reveals long 6000 cycles with average Coulombic efficiency 99.98 %. Additionally, can operate under wide temperature range from −5 °C 45 °C. This work highlights positive impact functionalization on electrochemical performance, providing bright future application for long‐lasting, wide‐temperature, PIBs beyond.

Язык: Английский

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Nonflammable Phosphate‐Based Electrolyte for Safe and Stable Potassium Batteries Enabled by Optimized Solvation Effect

Angewandte Chemie, Год журнала: 2024, Номер 136(29)

Опубликована: Май 6, 2024

Abstract Current potassium‐ion batteries (PIBs) are limited in safety and lifetime owing to the lack of suitable electrolyte solutions. To address these issues, herein, we report an innovative non‐flammable design strategy that leverages optimal moderate solvation phosphate‐based solvent which strikes a balance between capability salt dissociation ability, leading superior electrochemical performance. The formulated simultaneously exhibits advantages low concentration (only 0.6 M), viscosity, high ionic conductivity, oxidative stability, safety. Our also promotes formation self‐limiting inorganic‐rich interphases at anode surface, alongside robust cathode‐electrolyte interphase on iron‐based Prussian blue analogues, mitigating electrode/electrolyte side reactions preventing Fe dissolution. Notably, PIBs employing our exhibit exceptional durability, with 80 % capacity retention after 2,000 cycles high‐voltage 4.2 V coin cell. Impressively, larger scale pouch cell, it maintains over 81 its initial 1,400 1 C‐rate average Coulombic efficiency 99.6 %. This work represents significant advancement toward realization safe, sustainable, high‐performance PIBs.

Язык: Английский

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