Опубликована: Янв. 1, 2024
Язык: Английский
ACS Nano, Год журнала: 2025, Номер unknown
Опубликована: Янв. 10, 2025
Solid polymer electrolytes (SPEs) are promising candidates for lithium metal batteries (LMBs) owing to their safety features and compatibility with anodes. However, the inferior ionic conductivity electrochemical stability of SPEs hinder application in high-voltage solid-state LMBs (HVSSLMBs). Here, a strategy is proposed develop dual-anion-rich solvation structure by implementing ferroelectric barium titanate (BTO) nanoparticles (NPs) dual salts into poly(vinylidene fluoride) (PVDF)-based HVSSLMBs. The BTO NPs regulate spatial PVDF segments, enhancing local built-in electric field SPEs, which, turn, facilitates dissolution dissociation salts. This contributes an enhanced steric effect, which significantly improves Li+ transport kinetics stability. designed PVDF-based SPE achieves high 4.1 × 10–4 S cm–1 transference number 0.70 at 25 °C. Li//Li symmetric cells deliver excellent critical current density 2.4 mA cm–2 maintain stable Li plating/stripping process over 5000 h. After 1000 cycles 2C, LiFePO4//Li achieve discharge capacity 108.3 mAh g–1. Furthermore, LiNi0.8Co0.1Mn0.1O2 (NCM811)//Li present retention after 300 1C cutoff voltage 4.4 V. NCM811/Graphite pouch exhibit cycling performance. work illustrates that synergistic integration functional multiple holds significant potential development SPEs.
Язык: Английский
Процитировано
3
ACS Energy Letters, Год журнала: 2024, Номер unknown, С. 4800 - 4809
Опубликована: Сен. 12, 2024
Язык: Английский
Процитировано
13
Energy storage materials, Год журнала: 2025, Номер unknown, С. 104066 - 104066
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
2
Small, Год журнала: 2025, Номер unknown
Опубликована: Фев. 7, 2025
Lithium-oxygen (Li-O2) batteries with high energy density have given rise to tremendous advances in developing highly efficient storage devices. However, the barrier of Li dendrite growth and liquid electrolyte volatilization under semi-open architectures still restrict their future applications. Poly(vinylidene fluoride) (PVDF)-based polymer electrolytes are considered be an effective solution these issues, but presence reactive residual solvents severely disrupts long-term cycling stability battery. Herein, a tailoring strategy confine redistribute solvent molecules by introducing porous metal-organic framework (MOF) is proposed. The Lewis acid sites functional groups on MOFs offer more binding for solvents, leading involved anions Li+ solvation. Benefiting from tailored coordination environment electrolytes, effectively suppressed composite (MOF@PVDF). As result, MOF@PVDF enables Li//Li symmetrical cells ultra-stable over 800 h at 0.2 mA cm-2. Meanwhile, MOF@PVDF-based Li-O2 battery has realized long life above 1100 200 g-1. This work opens direction stable solvation structures electrolytes.
Язык: Английский
Процитировано
1
Energy storage materials, Год журнала: 2025, Номер unknown, С. 104129 - 104129
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
1
Advanced Energy Materials, Год журнала: 2025, Номер unknown
Опубликована: Апрель 10, 2025
Abstract Solvents in liquid and gel polymer electrolytes are recognized for contributing to high ionic conductivity high‐energy‐density lithium metal batteries. However, parasitic reactions involving solvents induce safety risks under thermal abuse conditions poor lifespan during room‐temperature cycles, which rarely investigated. This study introduces a thermoresponsive mono‐solvent electrolyte as built‐in switch. The polymerizes at elevated temperatures, creating passivate network without residue solvents. exhibits stability with 91% mass retention 200 °C significantly suppresses side between the electrolyte, reducing runaway risks. Ah‐level Li||LiNi 0.8 Co 0.1 Mn O 2 pouch batteries employing this can efficiently improve critical temperature of by 75 compared electrolyte. At ambient promotes formation stable solid interphase (SEI) rich LiF Li O, effectively dendrite growth on anode. Consequently, 0.5 0.2 0.3 cells retain capacity after 152 even high‐loading cathodes (19.7 mg cm −2 , 3 mAh ). research offers valuable insights into inhibiting electrochemical cycle runaway, enhancing
Язык: Английский
Процитировано
1
Nano-Micro Letters, Год журнала: 2025, Номер 17(1)
Опубликована: Май 7, 2025
Abstract Fluoropolymers promise all-solid-state lithium metal batteries (ASLMBs) but suffer from two critical challenges. The first is the trade-off between ionic conductivity ( σ ) and anode reactions, closely related to high-content residual solvents. second, usually consciously overlooked, fluoropolymer’s inherent instability against alkaline anodes. Here, we propose indium-based metal–organic frameworks (In-MOFs) as a multifunctional promoter simultaneously address these challenges, using poly(vinylidene fluoride–hexafluoropropylene) (PVH) typical fluoropolymer. In-MOF plays trio: (1) adsorbing converting free solvents into bonded states prevent their side reactions with anodes while retaining advantages on Li + transport; (2) forming inorganic-rich solid electrolyte interphase layers PVH reacting promote uniform deposition without dendrite growth; (3) reducing crystallinity promoting Li-salt dissociation. Therefore, resulting PVH/In-MOF (PVH-IM) showcases excellent electrochemical stability anodes, delivering 5550 h cycling at 0.2 mA cm −2 remarkable cumulative capacity of 1110 mAh . It also exhibits an ultrahigh 1.23 × 10 −3 S −1 25 °C. Moreover, LiFePO 4 |PVH-IM|Li full cells show outstanding rate capability cyclability (80.0% retention after 280 cycles 0.5C), demonstrating high potential for practical ASLMBs.
Язык: Английский
Процитировано
1
Giant, Год журнала: 2024, Номер 20, С. 100337 - 100337
Опубликована: Авг. 23, 2024
Язык: Английский
Процитировано
5
ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(43), С. 59547 - 59555
Опубликована: Окт. 17, 2024
The dehydrofluorination effect of poly(vinylidene fluoride) (PVDF) induced by ceramic fillers with an alkaline surface compromises the comprehensive properties solid composite electrolyte (SCE) and leads to deficient performance solid-state lithium metal batteries (SLMBs). In this work, a unique PVDF-based double-layer was fabricated, which consisted Li6.4La3Zr1.4Ta0.6O12 (LLZTO)-filled SCE poly(acrylic acid) (PAA) as alkalinity-scavenging agent in contact Li anode, another difluoro(oxalato)borate (LiDFOB) film-formation additive facing cathode. It is found that moderate amount PAA relieves degree PVDF matrix improves plating/stripping reversibility, addition LiDFOB involved formation stable passivation film on Consequently, resultant holds favorable overall properties, especially being well-compatible both electrodes, endowing SLMBs superior cycle rate at room temperature.
Язык: Английский
Процитировано
4
Energy & Environmental Science, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
This review thoroughly examines the impact of lean-solvent solid electrolyte (LSEs) on for safer and more durable lithium batteries. It also provides a comprehensive overview existing LSEs.
Язык: Английский
Процитировано
0