High Ion Conducting Solid Composite Electrolytes with Enhanced Interfacial Compatibility for Lithium Metal Batteries

Feng, Haoyu; Ma, Cheng; Dai, Kuan; Kuang, Gui‐Chao; Ivey, Douglas G.; Wei, Weifeng

doi:10.1002/celc.201801894

Cited by 18 publications

(15 citation statements)

References 52 publications

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“…The high conductivity of those EOEOEA GPEs should be attributed to the ester and ether groups in EOEOEA, resulting in a high solubility for lithium salts [29,30]. On the other hand, as shown in Figure 5a, at a certain temperature, the conductivity of gel electrolytes decreased with the increase of EOEOEA content, because a higher EOEOEA content led to a lower lithium salt content and lower conductivity [31,32].…”

Section: Resultsmentioning

confidence: 99%

Preparation and Properties of a High-Performance EOEOEA-Based Gel-Polymer-Electrolyte Lithium Battery

et al. 2019

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Gel polymer electrolyte (GPE) is a promising candidate for lithium-ion batteries due to its adhesion property (like a solid), diffusion property (like a liquid), and inhibition of the growth of lithium dendrite. In this paper, 2-(2-ethoxyethoxy)ethyl acrylate (EOEOEA) and LiBF4 electrolyte were mixed as precursors of gel polymer electrolytes. Through thermal curing, a thermally stable GPE with high ionic conductivity (5.60 × 10−4 s/cm at 30 °C) and wide room temperature electrochemical window (4.65 V) was prepared, and the properties of the GPE were measured by linear sweep voltammetry (LSV), AC impedance spectroscopy, Thermogravimetric analysis (TG), and X-ray diffraction (XRD) techniques. On the basis of the in-situ deep polymerization on a LiFePO4 electrode and cellulose membrane in a battery case, EOEOEA-based GPE could be derived on both LiFePO4 electrode and cellulose membrane. Meanwhile, the contact between GPE, LiFePO4 electrode, and lithium electrode was promoted. The capacity retention rate of the as-prepared LiBF4-EOEOEA 30% gel lithium battery reached 100% under the condition of 0.1 °C after 50 cycles, and the Coulombic efficiency was over 99%. Meanwhile, the growth of lithium dendrite could be effectively inhibited. GPE can be applied in high-performance lithium batteries.

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Section: Resultsmentioning

confidence: 99%

Preparation and Properties of a High-Performance EOEOEA-Based Gel-Polymer-Electrolyte Lithium Battery

et al. 2019

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Section: Macromolecular Design Of Polymer Matrixmentioning

confidence: 99%

“…As shown in Figure 2f, a cyclic carbonate‐cyclic ether copolymer was synthesized via radical polymerization of vinylene carbonate (VC) and tetrahydrofurfuryl acrylate (TFA). [ 65 ] The VC‐ co ‐TFA‐based SPE shows an amorphous state, a promoted tensile stress at break of 2.6 MPa, a high ionic conductivity of 1.6 × 10 −4 S cm −1 at ambient temperature, a wide electrochemical stability window of 4.7 V (vs Li/Li + ), and a t Li+ of 0.55. Additionally, the VC‐ co ‐TFA‐based SPE forms a polymer component‐rich solid electrolyte interface on lithium metal anode, which contributes to a high coulombic efficiency of 98.8% and a stable cycling in LiFePO 4 /SPE/Li cells, even at low temperature of 10 °C.…”

Section: Macromolecular Design Of Polymer Matrixmentioning

confidence: 99%

Macromolecular Design of Lithium Conductive Polymer as Electrolyte for Solid‐State Lithium Batteries

Meng

Lian

Cui

2020

Small

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In the development of solid‐state lithium batteries, solid polymer electrolyte (SPE) has drawn extensive concerns for its thermal and chemical stability, low density, and good processability. Especially SPE efficiently suppresses the formation of lithium dendrite and promotes battery safety. However, most of SPE is derived from the matrix with simple functional group, which suffers from low ionic conductivity, reduced mechanical properties after conductivity modification, bad electrochemical stability, and low lithium‐ion transference number. Appling macromolecular design with multiple functional groups to polymer matrix is accepted as a strategy to solve the problems of SPE fundamentally. In this review, macromolecular design based on lithium conducting groups is summarized including copolymerization, network construction, and grafting. Meanwhile, the construction of single‐ion conductor polymer is also focused herein. Moreover, synergistic effects between the designed matrix, lithium salt, and fillers are reviewed with the objective to further improve the performance of SPE. At last, future studies on macromolecular design are proposed in the development of SPE for solid‐state batteries with high energy density and durability.

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“…12c). Feng et al 102 designed a polymer-type SSE based on a cyclic carbonate-cyclic ether copolymer (Fig. 12d).…”

Section: Single Polymer-type Ssesmentioning

confidence: 99%

Recent advances in the interface design of solid-state electrolytes for solid-state energy storage devices

Hui

Hui³

et al. 2020

Mater. Horiz.

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High Ion Conducting Solid Composite Electrolytes with Enhanced Interfacial Compatibility for Lithium Metal Batteries

Cited by 18 publications

References 52 publications

Preparation and Properties of a High-Performance EOEOEA-Based Gel-Polymer-Electrolyte Lithium Battery

Preparation and Properties of a High-Performance EOEOEA-Based Gel-Polymer-Electrolyte Lithium Battery

Macromolecular Design of Lithium Conductive Polymer as Electrolyte for Solid‐State Lithium Batteries

Recent advances in the interface design of solid-state electrolytes for solid-state energy storage devices

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