A Compact Gel Membrane Based on a Blend of PEO and PVDF for Dendrite‐Free Lithium Metal Anodes

Liang, Shishuo; Shi, Yi; Ma, Tianyi; Yan, Wei-Yong; Qin, Sainan; Wang, Yuqi; Zhu, Yusong; Wang, Hongwei; Wu, Yuping

doi:10.1002/celc.201901351

Cited by 26 publications

(13 citation statements)

References 51 publications

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“…The first proposed strategy is constructing crosslinked or blocked structured polymer matrixes, such as P(STFSILi)–PEO–P(STFSILi) triblock copolymers, [ 49 ] PS‐ b ‐PEO, [ 50 ] crosslinked PE/PEO electrolytes, [ 51 ] PEO/PE‐ b ‐PEO copolymer, [ 52 ] blend of PEO and PVDF. [ 53 ] Another approach is designing the organic/inorganic composite electrolytes with fillers (Figure 5c,d). These inorganic fillers include passive fillers (SiO 2 , TiO 2 , ZrO 2 , Al 2 O 3 , BaTiO 3 , etc.…”

Section: Interfaces In All‐solid‐state Lithium Batteriesmentioning

confidence: 99%

Interface Issues and Challenges in All‐Solid‐State Batteries: Lithium, Sodium, and Beyond

et al. 2020

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Owing to the promise of high safety and energy density, all‐solid‐state batteries are attracting incremental interest as one of the most promising next‐generation energy storage systems. However, their widespread applications are inhibited by many technical challenges, including low‐conductivity electrolytes, dendrite growth, and poor cycle/rate properties. Particularly, the interfacial dynamics between the solid electrolyte and the electrode is considered as a crucial factor in determining solid‐state battery performance. In recent years, intensive research efforts have been devoted to understanding the interfacial behavior and strategies to overcome these challenges for all‐solid‐state batteries. Here, the interfacial principle and engineering in a variety of solid‐state batteries, including solid‐state lithium/sodium batteries and emerging batteries (lithium–sulfur, lithium–air, etc.), are discussed. Specific attention is paid to interface physics (contact and wettability) and interface chemistry (passivation layer, ionic transport, dendrite growth), as well as the strategies to address the above concerns. The purpose here is to outline the current interface issues and challenges, allowing for target‐oriented research for solid‐state electrochemical energy storage. Current trends and future perspectives in interfacial engineering are also presented.

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Section: Interfaces In All‐solid‐state Lithium Batteriesmentioning

confidence: 99%

Interface Issues and Challenges in All‐Solid‐State Batteries: Lithium, Sodium, and Beyond

et al. 2020

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“…The lithium ion transference number ( t Li+ ) of the electrolytes (the GPE or the organic liquid electrolyte) was obtained based on the Evans’ technique and calculated with Equation (4) [ 16 ].

…”

Section: Methodsmentioning

confidence: 99%

Nylon-Based Composite Gel Membrane Fabricated via Sequential Layer-By-Layer Electrospinning for Rechargeable Lithium Batteries with High Performance

et al. 2020

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With the raw materials of poly(vinylidene-co-hexafluoropropylene) (P(VDF-HFP)) and polyamide 6 (PA6, nylon 6), a sandwich-structured composite membrane, PA6/P(VDF-HFP)/PA6, is fabricated via sequential layer-by-layer electrospinning. The nylon-based composite exhibits high absorption to organic liquid electrolyte (270 wt%) owing to its high porosity (90.35%), good mechanical property (17.11 MPa), and outstanding shut-down behavior from approximately 145 to 230 °C. Moreover, the dimensional shrink of a wet PA6 porous membrane immersed into liquid electrolyte is cured due to the existence of the P(VDF-HFP) middle layer. After swelling by the LiPF6-based organic liquid electrolyte, the obtained PA6/P(VDF-HFP)/PA6-based gel polymer electrolytes (GPE) shows high ionic conductivity at room temperature (4.2 mS cm−1), a wide electrochemical stable window (4.8 V), and low activation energy for Li+ ion conduction (4.68 kJ mol−1). Benefiting from the precise porosity structure made of the interlaced electrospinning nanofibers and the superior physicochemical properties of the nylon-based composite GPE, the reversible Li+ ion dissolution/deposition behaviors between the GPE and Li anode are successfully realized with the Li/Li symmetrical cells (current density: 1.0 mA cm−2; areal capacity: 1.0 mAh cm−2) proceeding over 400 h at a polarization voltage of no more than 70 mV. Furthermore, the nylon-based composite GPE in assembled Li/LiFePO4 cells displays good electrochemical stability, high discharge capacity, good cycle durability, and high rate capability. This research provides a new strategy to fabricate gel polymer electrolytes via the electrospinning technique for rechargeable lithium batteries with good electrochemical performance, high security, and low cost.

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“…and the filler materials (SiO 2 , TiO 2 , Al 2 O 3 , MgO, etc.). [ 148,159‐164 ] The intrinsic properties of the separator such as thermal stability, mechanical strength and wettability are enhanced. Common fabrication methods of single‐layer functional separators are casting, electrospinning, electrospraying and phase inversion methods.…”

Section: Dendrite Suppression Through Separator Functionalizationmentioning

confidence: 99%

Recent advances in separator engineering for effective dendrite suppression of Li‐metal anodes

et al. 2021

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Lithium dendrites cause battery failures and safety hazards in liquid‐electrolyte lithium‐based batteries. To address this problem, each component of the battery, such as cathode, anode, electrolyte and separator, should be well matched and engineered for the integrated battery system. The separator plays an increasingly important role owing to its gradual transformation from an inert to an active component in the battery, especially for resolving Li dendrite issues in Li‐metal batteries. Armed with advanced nanotechnology solutions, separator engineering presents a formidable strategy to suppress dendrite growth dynamics by modifying the electrolyte chemistry, regulating/trapping unwanted ionic species and redirecting dendrite growth direction. This review summarizes recent advances in separator engineering for effective dendrite suppression of Li‐metal anodes. We first introduce the challenges that the Li‐metal anode faces and the irreplaceable role of separators in the battery system. The characterization parameters and design principles of separators are also discussed. Then, the mainstream techniques for separator functionalization and their impacts on dendrite suppression are scrutinized and highlighted. Lastly, the conclusion is drawn and the future outlook for separator engineering is presented.

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A Compact Gel Membrane Based on a Blend of PEO and PVDF for Dendrite‐Free Lithium Metal Anodes

Cited by 26 publications

References 51 publications

Interface Issues and Challenges in All‐Solid‐State Batteries: Lithium, Sodium, and Beyond

Interface Issues and Challenges in All‐Solid‐State Batteries: Lithium, Sodium, and Beyond

Nylon-Based Composite Gel Membrane Fabricated via Sequential Layer-By-Layer Electrospinning for Rechargeable Lithium Batteries with High Performance

Recent advances in separator engineering for effective dendrite suppression of Li‐metal anodes

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