Building a highly functional Li1.3Al0.3Ti1.7(PO4)3/poly (vinylidene fluoride) composite electrolyte for all-solid-state lithium batteries

Jin, Yingmin; Liu, Chaojun; Jia, Zhenggang; Zong, Xin; Li, Dong; Fu, Mengyu; Wei, Junhua; Xiong, Yueping

doi:10.1016/j.jallcom.2021.159890

Cited by 26 publications

(18 citation statements)

References 53 publications

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“…During the charging and discharging processes, the low t Li + tended to cause high battery polarization and accumulation of anionic decomposition products on the electrode, resulting in lithium dendrites. , The t Li + value was determined by the Bruce–Vincent equation. − A symmetrical Li/PAF-QSPE/Li cell was assembled, and chronoamperometry and EIS analyses were performed (Figure b). The t Li + of the PAF-QSPE was calculated to be 0.56, which was higher than the t Li + of the normal polymer electrolyte (∼0.3) . The main factor that affected the ionic conductivity and t Li + of the PAF-QSPE was the dynamics of Li + .…”

Section: Resultsmentioning

confidence: 83%

“…The t Li + of the PAF-QSPE was calculated to be 0.56, which was higher than the t Li + of the normal polymer electrolyte (∼0.3). 43 The main factor that affected the ionic conductivity and t Li + of the PAF-QSPE was the dynamics of Li + . The amidoxime groups in the skeleton of PAF-170-AO not only restricted the movement of TFSI − ions through hydrogen bonding but also promoted the dissociation of Li + and improved the mobility, thereby weakening the concentration gradient inside the battery, reducing the concentration polarization effect, and prolonging the battery life.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

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Lithium-Rich Porous Aromatic Framework-Based Quasi-Solid Polymer Electrolyte for High-Performance Lithium Ion Batteries

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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The development of solid polymer electrolytes (SPEs) with high ionic conductivity, wide electrochemical window, and high mechanical strength is the key factor to realize highenergy-density solid lithium ion batteries (SLIBs). Porous aromatic frameworks (PAFs) have the advantages of high porosity, easily functionalized molecular structure, and rigid stable framework, which fully meet the requirements of solid polymer electrolytes with high Li + capacity, fast Li + transport, and safety. Herein, a lithium-rich amidoxime (AO)-modified porous aromatic framework (PAF-170-AO) was obtained through the absorption of LiTFSI by amidoxime groups and abundant pores and then compounded with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) to prepare a PAF-based quasi-solid polymer electrolyte (PAF-QSPE) with only tiny amounts of plasticizer (∼12 μL). The amidoxime groups of PAF-170-AO restricted the movement of the anions of LiTFSI through hydrogen bonding, which effectively promoted the dissociation and migration number of Li + (t Li + ), reduced the concentration polarization, and inhibited the growth of lithium dendrites. The PAF-QSPE exhibited a high ionic conductivity of 1.75 × 10 −4 S cm −1 and t Li + of 0.55 at room temperature. The activation energy was as low as 0.136 eV. Furthermore, the assembled SLIBs with the PAF-QSPE presented a discharge capacity of 163 mAh g −1 at 0.2 C and a capacity retention rate of 96% after 350 cycles, illustrating a stable cycling performance. This work demonstrated the great application potential of lithium-rich PAFs in QSPEs.

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Section: Resultsmentioning

confidence: 83%

Section: Electrochemical Propertiesmentioning

confidence: 99%

Lithium-Rich Porous Aromatic Framework-Based Quasi-Solid Polymer Electrolyte for High-Performance Lithium Ion Batteries

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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“…They found that the accumulation of formate–polymeric species produced under the presence of Li + ions could result in the polymer instability, which is detrimental to the battery performance. In addition, the halogenated polymers such as PVDF and PVDF-HFP could serve as the important host-polymers for lithium batteries due to the interaction between their fluorine (F) atoms and lithium ions, which is beneficial to the diffusion of ions. , Their highly polar carbon–halogen (C–F) bonds resulting in the strong nucleophile and the highly electron deficient α-C atoms tend to undergo the following reactions: (1) nucleophilic substitution at the site of α-C and (2) elimination of β-H and halogens to produce an alkene. Owing to the poor leaving nature of F, the nucleophilic substitution at the α-C was unfavorable and elimination mechanism should be preferred for the reaction of PVDF or PVDF-HFP with Li 2 O 2 .…”

Section: Semi-solid/solid Electrolytes In Flexible and Portable Elect...mentioning

confidence: 99%

Opportunities of Flexible and Portable Electrochemical Devices for Energy Storage: Expanding the Spotlight onto Semi-solid/Solid Electrolytes

et al. 2022

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The ever-increasing demand for flexible and portable electronics has stimulated research and development in building advanced electrochemical energy devices which are lightweight, ultrathin, small in size, bendable, foldable, knittable, wearable, and/or stretchable. In such flexible and portable devices, semi-solid/solid electrolytes besides anodes and cathodes are the necessary components determining the energy/power performances. By serving as the ion transport channels, such semi-solid/solid electrolytes may be beneficial to resolving the issues of leakage, electrode corrosion, and metal electrode dendrite growth. In this paper, the fundamentals of semi-solid/solid electrolytes (e.g., chemical composition, ionic conductivity, electrochemical window, mechanical strength, thermal stability, and other attractive features), the electrode–electrolyte interfacial properties, and their relationships with the performance of various energy devices (e.g., supercapacitors, secondary ion batteries, metal–sulfur batteries, and metal–air batteries) are comprehensively reviewed in terms of materials synthesis and/or characterization, functional mechanisms, and device assembling for performance validation. The most recent advancements in improving the performance of electrochemical energy devices are summarized with focuses on analyzing the existing technical challenges (e.g., solid electrolyte interphase formation, metal electrode dendrite growth, polysulfide shuttle issue, electrolyte instability in half-open battery structure) and the strategies for overcoming these challenges through modification of semi-solid/solid electrolyte materials. Several possible directions for future research and development are proposed for going beyond existing technological bottlenecks and achieving desirable flexible and portable electrochemical energy devices to fulfill their practical applications. It is expected that this review may provide the readers with a comprehensive cross-technology understanding of the semi-solid/solid electrolytes for facilitating their current and future researches on the flexible and portable electrochemical energy devices.

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“…PVDF can also be combined with common inorganic electrolytes to reduce its own crystallinity, thereby improving the ionic conductivity. [ 72–75 ]…”

Section: Fluorinated Sesmentioning

confidence: 99%

Fluorinated Strategies Among All‐Solid‐State Lithium Metal Batteries from Microperspective

Yang

Liu

et al. 2022

Small Structures

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All‐solid‐state lithium metal batteries (ASSLMBs) are becoming the crucial energy‐storage candidate in achieving both theoretical capacity and safety guarantee. However, the inherent defects of solid electrolytes (SEs) (low ionic conductivity, lack of mechanical properties, weak antioxidant capacity, etc.) and the existence of interfacial issues between electrodes (cathode/electrolyte interface and anode/electrolyte interface) hinder further practical application. To overcome these problems, many approaches have been developed, such as composite solid electrolytes, interfacial coatings, electrolyte additives, etc. Among them, fluorides and its derivatives with good chemical stability are generally believed as one of the significant materials for stabilizing ASSLMBs. In this article, the progress of fluorinated strategies in ASSLMBs is summarized from the aspects of fluorinated SEs and fluorinated interfaces. Meanwhile, the enhanced mechanisms of fluorinated strategies are emphasized from the microscopic view of the nanostructures evolution based on the discussion of emerging analysis technologies such as cryogenic transmission electron microscopy. The progress of future fluorinated strategies is prospected, and this review may thus instruct the rational design of high performance ASSLMBs.

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Building a highly functional Li1.3Al0.3Ti1.7(PO4)3/poly (vinylidene fluoride) composite electrolyte for all-solid-state lithium batteries

Cited by 26 publications

References 53 publications

Lithium-Rich Porous Aromatic Framework-Based Quasi-Solid Polymer Electrolyte for High-Performance Lithium Ion Batteries

Lithium-Rich Porous Aromatic Framework-Based Quasi-Solid Polymer Electrolyte for High-Performance Lithium Ion Batteries

Opportunities of Flexible and Portable Electrochemical Devices for Energy Storage: Expanding the Spotlight onto Semi-solid/Solid Electrolytes

Fluorinated Strategies Among All‐Solid‐State Lithium Metal Batteries from Microperspective

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