Review of Multifunctional Separators: Stabilizing the Cathode and the Anode for Alkali (Li, Na, and K) Metal–Sulfur and Selenium Batteries

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(9), P. 8053 - 8125

Published: March 29, 2022

Alkali metal batteries based on lithium, sodium, and potassium anodes sulfur-based cathodes are regarded as key for next-generation energy storage due to their high theoretical potential cost effectiveness. However, metal-sulfur remain challenged by several factors, including polysulfides' (PSs) dissolution, sluggish sulfur redox kinetics at the cathode, metallic dendrite growth anode. Functional separators interlayers an innovative approach remedying these drawbacks. Here we critically review state-of-the-art in separators/interlayers cathode anode protection, covering Li-S emerging Na-S K-S systems. The approaches improving electrochemical performance may be categorized one or a combination of following: Immobilization polysulfides (cathode); catalyzing introduction protective layers serve artificial solid electrolyte interphase (SEI) (anode); combined improvement wetting homogenization ion flux (anode cathode). It is demonstrated that while advances relatively mature, less progress has been made with more challenging chemistry increased instability Throughout sections there complementary discussion functional alkali systems metal-selenium sulfide. focus then shifts SEI/cathode (CEI) employed stabilize solid-state electrolytes (SSEs) (SSBs). SSEs focuses inorganic Li- Na-based oxides sulfides but also touches some hybrid matrix minority polymer phase. moves practical considerations separators, scaleup issues technoeconomics. concludes outlook section, where discuss mechanics, spectroscopy, advanced electron microscopy (e.g. cryo-transmission (cryo-TEM) cryo-focused beam (cryo-FIB))-based analysis separator structure-battery interrelations. identify outstanding open scientific technological questions providing recommendations future research topics.

Language: Английский

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In Situ Construction a Stable Protective Layer in Polymer Electrolyte for Ultralong Lifespan Solid‐State Lithium Metal Batteries

Advanced Science, Journal Year: 2022, Volume and Issue: 9(12)

Published: Feb. 22, 2022

Abstract Solid‐state lithium metal batteries (SLMBs) are attracting enormous attention due to their enhanced safety and high theoretical energy density. However, the alkali with reducibility can react solid‐state electrolytes resulting in inferior cycle lifespan. Herein, inspired by idea of interface design, 1‐butyl‐1‐methylpyrrolidinium bis(trifluoromethanesulfonyl) imide as an initiator generate artificial protective layer polymer electrolyte is selected. Time‐of‐flight secondary ion mass spectrometry X‐ray photoelectron spectroscopy reveal stable solid (SEI) situ formed between electrolyte/Li interface. Scanning electron microscopy (SEM) images demonstrate that constructed SEI promote homogeneous Li deposition. As a result, Li/Li symmetrical cells enable ultralong‐term for over 4500 h. Moreover, as‐prepared LiFePO 4 /Li SLMBs exhibit impressive ultra‐long lifespan 1300 cycles at 1 C, well 1600 0.5 C capacity retention ratio 80%. This work offers effective strategy construction interface, paving way rapid development long SLMBs.

Language: Английский

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Critical Current Densities for High-Performance All-Solid-State Li-Metal Batteries: Fundamentals, Mechanisms, Interfaces, Materials, and Applications

ACS Energy Letters, Journal Year: 2022, Volume and Issue: 7(4), P. 1492 - 1527

Published: March 29, 2022

All-solid-state lithium batteries (ASSLBs) are considered promising next-generation energy storage devices due to their safety and high volumetric densities. However, achieving the key U.S. DOE milestone of a power density 33 kW L–1 appears be significant hurdle in current ASSLBs. One main reasons is that advancements solid electrolyte (SE) conductivity have been prioritized over critical (CCD) when employing an elemental Li anode. Several aspects electrode- SE interface-based difficulties must resolved before commercialization. Here, we very deeply analyze some crucial parameters effectively restrict dendrite formation while CCD. Mechanistic explanations provided comprehend relationship between cell failure development dendrites. The latest progress discussed higher CCD emerging structures, including Li-stuffed garnets, Na superionic conductors (NASICONs), sulfides, phosphorus oxynitride (LiPON). Furthermore, primary strategies for improving CCDs by tailoring design stabilizing interfaces proposed advanced

Language: 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, Journal Year: 2023, Volume and Issue: 13(10)

Published: Jan. 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

Language: Английский

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Long‐Life Lithium‐Metal All‐Solid‐State Batteries and Stable Li Plating Enabled by In Situ Formation of Li₃PS₄ in the SEI Layer

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(34)

Published: June 29, 2022

An ultrastable and kinetically favorable interface is constructed between sulfide-poly(ethylene oxide) (PEO) composite solid electrolytes (CSEs) lithium metal, via in situ formation of a electrolyte interphase (SEI) layer containing Li3 PS4 . A specially designed sulfide, polysulfidophosphate (LPS), can distribute uniformly the PEO matrix simple stirring process because its complete solubility acetonitrile solvent, which advantageous for creating homogeneous SEI layer. The CSE/Li with high Li+ transportation capability stabilized quickly through /Li2 S/LiF reaction LPS metal to inhibit dendrite growth. Li/Li symmetric cell LPS-integrated CSE exhibits constant small resistance 10 Ω cm2 during cycling, delivering stable cycling 3475 h at current density 0.2 mA cm-2 critical 0.9 60 °C. Impressive electrochemical performance also demonstrated LiFePO4 /CSE/Li all-solid-state batteries capacity 127.6 mAh g-1 after 1000 cycles 1 C.

Language: Английский

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High ionic conductivity PEO-based electrolyte with 3D framework for Dendrite-free solid-state lithium metal batteries at ambient temperature

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 431, P. 133352 - 133352

Published: Nov. 4, 2021

Language: Английский

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Polymer-in-salt electrolyte enables ultrahigh ionic conductivity for advanced solid-state lithium metal batteries

Energy storage materials, Journal Year: 2022, Volume and Issue: 54, P. 440 - 449

Published: Oct. 30, 2022

Language: Английский

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Uniform lithiophilic layers in 3D current collectors enable ultrastable solid electrolyte interphase for high-performance lithium metal batteries

Nano Energy, Journal Year: 2022, Volume and Issue: 96, P. 107121 - 107121

Published: March 10, 2022

Language: Английский

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Molecular Self-Assembled Ether-Based Polyrotaxane Solid Electrolyte for Lithium Metal Batteries

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(3), P. 1548 - 1556

Published: Jan. 13, 2023

Poly(ethylene oxide) has been widely investigated as a potential separator for solid-state lithium metal batteries. However, its applications were significantly restricted by low ionic conductivity and narrow electrochemical stability window (<4.0 V vs Li/Li+) at room temperature. Herein, novel molecular self-assembled ether-based polyrotaxane electrolyte was designed using different functional units prepared threading cyclic 18-crown ether-6 (18C6) to linear poly(ethylene glycol) (PEG) via intermolecular hydrogen bond terminating with hexamethylene diisocyanate trimer (HDIt), which strongly confirmed local structure-sensitive solid/liquid-state nuclear magnetic resonance (NMR) techniques. The shown an obviously increased room-temperature of 3.48 × 10-4 S cm-1 compared 1.12 10-5 without assembling units, contributing the enhanced cycling batteries both LiFePO4 LiNi0.8Co0.15Al0.05O2 cathode materials. This advanced strategy provides new paradigm in designing solid polymer electrolytes demanded performance

Language: Английский

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Solid polymer electrolytes: Ion conduction mechanisms and enhancement strategies

Deleted Journal, Journal Year: 2023, Volume and Issue: 2, P. e9120050 - e9120050

Published: Feb. 1, 2023

Solid polymer electrolytes (SPEs) possess comprehensive advantages such as high flexibility, low interfacial resistance with the electrodes, excellent film-forming ability, and price, however, their applications in solid-state batteries are mainly hindered by insufficient ionic conductivity especially below melting temperatures, etc. To improve ion conduction capability other properties, a variety of modification strategies have been exploited. In this review article, we scrutinize structure characteristics transfer behaviors SPEs (and composites) then disclose mechanisms. The transport involves hopping segmental motion, improvement is attributed to increase concentration mobility charge carriers construction fast-ion pathways. Furthermore, recent advances on enhance from copolymer design lithium salt exploitation, additive engineering, electrolyte micromorphology adjustion summarized. This article intends give comprehensive, systemic, profound understanding enhancement mechanisms for viable safety energy density.

Language: Английский

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