In Situ Fabricated Quasi‐Solid Polymer Electrolyte for High‐Energy‐Density Lithium Metal Battery Capable of Subzero Operation

Advanced Energy Materials, Год журнала: 2021, Номер 12(2)

Опубликована: Дек. 1, 2021

Abstract Solid‐state batteries (SSBs) are an emerging technology for safe and high‐energy‐density electrochemical energy storage. Unfortunately, SSBs suffer from inadequate ionic conductivity sluggish interfacial transport at subzero temperatures, which limit their widespread application. Herein, a flexible, stable, highly conductive quasi‐solid polymer electrolyte (QSPE) is developed that allows low‐temperature (LT) operation. The in situ polymerized QSPE has integrated battery structure, outstanding (e.g., 1.0 mS cm −1 −30 °C), exhibits favorable compatibility with Li metal (>2000 h Li|QSPE|Li). Li|QSPE|LiFePO 4 high‐voltage Li|QSPE|LiNi 0.8 Mn 0.1 Co O 2 demonstrate excellent long‐term stability cycles room temperature) can operate effectively LT °C). Furthermore, pouch cells LiNi (14.5 mg −2 ) cathode show flexibility, safety, high capacity. performance of this ascribed to its unique multilayer solvation structure provides fast + stability. Thus, the newly chemistry enables practical high‐voltage, solid‐state batteries.

Язык: Английский

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Solid polymer electrolyte with in-situ generated fast Li+ conducting network enable high voltage and dendrite-free lithium metal battery

Energy storage materials, Год журнала: 2021, Номер 44, С. 93 - 103

Опубликована: Окт. 9, 2021

Язык: Английский

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Mechanism understanding for stripping electrochemistry of Li metal anode

SusMat, Год журнала: 2021, Номер 1(4), С. 506 - 536

Опубликована: Дек. 1, 2021

Abstract The pursuit of sustainable energy has a great request for advanced storage devices. Lithium metal batteries are regarded as potential electrochemical system because the extremely high capacity and most negative lithium anode. Dead formed in stripping process significantly contributes to low efficiency short lifespan rechargeable batteries. This review displays critical on current research status about electrochemistry significance robust anode is emphasized. models different scenarios discussed. Specific attention paid understanding principles atom diffusion, reaction, ion diffusion solid electrolyte interphase (SEI), electron transfer with purpose strengthen insights into behavior electrode stripping. factors affecting processes corresponding solutions summarized categorized follows: surface physics, SEI, operational external factors. affords fresh explore design based comprehensive electrochemistry.

Язык: Английский

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Enabling All‐Solid‐State Li Metal Batteries Operated at 30 °C by Molecular Regulation of Polymer Electrolyte

Advanced Energy Materials, Год журнала: 2023, Номер 13(10)

Опубликована: Янв. 20, 2023

Abstract The low ionic conductivity of poly(ethylene oxide) (PEO)‐based polymer electrolytes at room temperature and the undesired lithium‐dendrite growth Li|PEO interface impede their further application. Herein, a PEO is regulated molecular level through copper ion (Cu 2+ ) coordination effect with both Li salts to achieve high + 0.2 mS cm −1 transference number 0.42 30 °C. Moreover, Cu‐coordinated electrolyte neither sticky nor hygroscopic because hydrophilic oxygen groups in are terminated by Cu ions. Furthermore, situ formed F/Li‐rich inorganic layer induced CuF 2 additive accelerates transport kinetics enables uniform deposition during plating/stripping. As result, ‐coordinated deliver critical current density 1.5 mA −2 An all‐solid‐state Li‐LiNi 0.83 Co 0.12 Mn 0.05 O (NCM83) battery such coordinated exhibits long cycle life over 500 cycles capacity retention 71% under 0.6 C When mass loading increases record 7 mg , Li‐NCM83 cell delivers areal 1.07 mAh 0.1

Язык: Английский

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Ion–Dipole-Interaction-Induced Encapsulation of Free Residual Solvent for Long-Cycle Solid-State Lithium Metal Batteries

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(47), С. 25632 - 25642

Опубликована: Ноя. 9, 2023

Owing to high ionic conductivity and mechanical strength, poly(vinylidene fluoride) (PVDF) electrolytes have attracted increasing attention for solid-state lithium batteries, but highly reactive residual solvents severely plague cycling stability. Herein, we report a free-solvent-capturing strategy triggered by reinforced ion-dipole interactions between Li+ solvent molecules. Lithium difluoro(oxalato)borate (LiDFOB) salt additive with electron-withdrawing capability serves as redistributor of the electropositive state, which offers more binding sites solvents. Benefiting from modified coordination environment, kinetically stable anion-derived interphases are preferentially formed, effectively mitigating interfacial side reactions electrodes electrolytes. As result, assembled battery shows lifetime over 2000 cycles an average Coulombic efficiency 99.9% capacity retention 80%. Our discovery sheds fresh light on targeted regulation extend cycle life batteries.

Язык: Английский

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Fundamentals of Electrolyte Design for Wide‐Temperature Lithium Metal Batteries

Advanced Energy Materials, Год журнала: 2023, Номер 13(37)

Опубликована: Авг. 3, 2023

Abstract Lithium metal‐based batteries (LMBs) have garnered significant attention due to their exceptional energy density and lightweight characteristics. However, the electrochemical performance of LMBs often falls short, particularly in extreme temperature conditions. To address these challenges, development electrolytes capable withstanding wide ranges has emerged as a highly promising strategy for enhancing operational capabilities LMB across diverse weather This comprehensive review aims explore degradation mechanisms wide‐temperature electrolytes, establishing fundamental understanding failure that impede at harsh temperatures. Essential properties required are elucidated, latest advancements electrolyte technologies tailored specifically all‐climate operations comprehensively discussed. Particular emphasis is placed on unique role solvation structure interfacial offers valuable insights proposes directions practical implementation LMBs, contributing significantly existing knowledge base while concurrently paving way developing robust rigors environments.

Язык: Английский

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Construction of a High-Performance Composite Solid Electrolyte Through In-Situ Polymerization within a Self-Supported Porous Garnet Framework

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Янв. 12, 2024

Composite solid electrolytes (CSEs) have emerged as promising candidates for safe and high-energy-density solid-state lithium metal batteries (SSLMBs). However, concurrently achieving exceptional ionic conductivity interface compatibility between the electrolyte electrode presents a significant challenge in development of high-performance CSEs SSLMBs. To overcome these challenges, we present method involving in-situ polymerization monomer within self-supported porous Li

Язык: Английский

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Progress of Polymer Electrolytes Worked in Solid‐State Lithium Batteries for Wide‐Temperature Application

Small, Год журнала: 2024, Номер 20(31)

Опубликована: Март 10, 2024

Abstract Solid‐state Li‐ion batteries have emerged as the most promising next‐generation energy storage systems, offering theoretical advantages such superior safety and higher density. However, polymer‐based solid‐state face challenges across wide temperature ranges. The primary issue lies in fact that polymer electrolytes exhibit relatively low ionic conductivity at or below room temperature. This sensitivity to variations poses operating lithium sub‐zero temperatures. Moreover, elevated working temperatures lead shrinkage deformation, ultimately resulting battery failure. To address this challenge of batteries, review presents an overview various electrolyte systems. provides insights into temperature‐dependent physical electrochemical properties polymers, aiming expand range operation. also further summarizes modification strategies for suited diverse final section performance different Valuable potential future research directions designing wide‐temperature are presented based on differences performance. information is intended inspire practical applications batteries.

Язык: Английский

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Recent progress in quasi-solid and solid polymer electrolytes for multivalent metal-ion batteries

Journal of Materials Chemistry A, Год журнала: 2021, Номер 9(43), С. 24175 - 24194

Опубликована: Янв. 1, 2021

The increasing urgency of the energy source crisis has accelerated application polymers in storage for renewable energy.

Язык: Английский

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Quasi-Solid-State Ion-Conducting Arrays Composite Electrolytes with Fast Ion Transport Vertical-Aligned Interfaces for All-Weather Practical Lithium-Metal Batteries

Nano-Micro Letters, Год журнала: 2022, Номер 14(1)

Опубликована: Окт. 31, 2022

The rapid improvement in the gel polymer electrolytes (GPEs) with high ionic conductivity brought it closer to practical applications solid-state Li-metal batteries. combination of solvent and enables quasi-liquid fast ion transport GPEs. However, different capacity between will cause local nonuniform Li+ distribution, leading severe dendrite growth. In addition, poor thermal stability also limits operating-temperature window electrolytes. Optimizing environment enhancing are two major challenges that hinder application Here, a strategy by introducing ion-conducting arrays (ICA) is created vertical-aligned montmorillonite into GPE. Rapid on ICA was demonstrated 6Li nuclear magnetic resonance synchrotron X-ray diffraction, combined computer simulations visualize process. Compared conventional randomly dispersed fillers, provides continuous interfaces regulate enhances tolerance GPEs extreme temperatures. Therefore, GPE/ICA exhibits room-temperature (1.08 mS cm-1) long-term stable Li deposition/stripping cycles (> 1000 h). As final proof, Li||GPE/ICA||LiFePO4 cells exhibit excellent cycle performance at wide temperature range (from 0 60 °C), which shows promising path toward all-weather

Язык: Английский

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