Nanocomposite with fast Li+ conducting percolation network: Solid polymer electrolyte with Li+ non-conducting filler

Ao, Xin; Wang, Xiaotao; Tan, Jiewen; Zhang, Shaolong; Su, Chenliang; Dong, Lei; Tang, Mingxue; Wang, Zhongchang; Tian, Bingbing; Wang, Haihui

doi:10.1016/j.nanoen.2020.105475

Cited by 80 publications

(44 citation statements)

References 59 publications

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“…With the presence of UiO-66, the FT-IR spectrum of MMSE-4.5 shows fewer splits and a decrease of intensity in the typical peaks of LiTFSI (1201 and 1335 cm −1 ), implying that there is more "free TFSI − " in MMSE-4.5. 60 The peaks of −CH 2 − and −CF 2 − in MMSE-4.5 and PSE exhibit a blue shift compared with those in MSE (1407−1409 and 1176−1183 cm −1 , Figure S5). Such a behavior may arise from the ion−dipole interactions between C−F in P(VDF-HFP) and imidazolium cations in EMIMTFSI, as proved by density functional theory (DFT) calculations.…”

Section: Resultsmentioning

confidence: 95%

High-Voltage and Wide-Temperature Lithium Metal Batteries Enabled by Ultrathin MOF-Derived Solid Polymer Electrolytes with Modulated Ion Transport

Yao

Ruan

et al. 2021

ACS Appl. Mater. Interfaces

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Solid polymer electrolytes (SPEs) of superior ionic conductivity, long-term cycling stability, and good interface compatibility are regarded as promising candidates to enable the practical applications of solid lithium metal batteries (SLMBs). Here, a mixed-matrix SPE (MMSE) with incorporated metal–organic frameworks (MOFs) and ionic liquid is prepared. The dissociation of Li salt in MMSE can be promoted effectively due to the introduction of MOF via the Fourier-transform infrared spectroscopy (FT-IR) analysis, density functional theory calculation, and molecular dynamics simulation. The as-formed MMSE exhibits an ultralow thickness of 20 μm with a satisfactory ionic conductivity and lithium-ion transference number (1.1 mS cm–1 at 30 °C, 0.72). The optimized SLMBs with high-voltage LiMn0.75Fe0.25PO4 (LMFP) exhibit an excellent cyclability at 4.2 V under room temperature. Moreover, Li/MMSE/LiFePO4 cells have desirable cycle performance from −20 to 100 °C, and their capacity remains 143.3 mA h g–1 after being cycled 300 times at 10 C at 100 °C. The Li/LiFePO4 pouch cells also show excellent safety under extreme conditions. The Li symmetric cells can work steadily even at a supreme current density of 4 mA cm–2 at 100 °C. From the above analysis, these MMSEs present new opportunities for the development of SLMBs with good electrochemical properties.

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Section: Resultsmentioning

confidence: 95%

High-Voltage and Wide-Temperature Lithium Metal Batteries Enabled by Ultrathin MOF-Derived Solid Polymer Electrolytes with Modulated Ion Transport

Yao

Ruan

et al. 2021

ACS Appl. Mater. Interfaces

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“…The i, iii, iv, I, III, and IV peaks are related to Ce 4+ . [38,39] The high-resolution XPS spectra (Figure 3f 4a). [40] By contrast, the solution containing CNFs and the blank Li 2 S 6 solution remain yellow, and distinct characteristic peaks of Li 2 S 6 and Li 2 S 4 appear in the UVvis spectra (Figure 4a).…”

Section: Resultsmentioning

confidence: 99%

Ni‐CeO₂ Heterostructures in Li‐S Batteries: A Balancing Act between Adsorption and Catalytic Conversion of Polysulfide

Kong

Huang

et al. 2022

Advanced Science

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Lithium–sulfur (Li–S) batteries have attracted considerable attention over the last two decades because of a high energy density and low cost. However, the wide application of Li–S batteries has been severely impeded due to the poor electrical conductivity of S, shuttling effect of soluble lithium polysulfides (LiPSs), and sluggish redox kinetics of S species, especially under high S loading. To address all these issues, a Ni–CeO2 heterostructure‐doped carbon nanofiber (Ni‐CeO2‐CNF) is developed as an S host that combines the strong adsorption with the high catalytic activity and the good electrical conductivity, where the LiPSs anchored on the heterostructure surface can directly gain electrons from the current collector and realize a fast conversion between S8 and Li2S. Therefore, Li–S batteries with S@Ni‐CeO2‐CNF cathodes exhibit superior long‐term cycling stability, with a capacity decay of 0.046% per cycle over 1000 cycles, even at 2 C. Noteworthy, under a sulfur loading up to 6 mg cm−2, a high reversible areal capacity of 5.3 mAh cm−2 can be achieved after 50 cycles at 0.1 C. The heterostructure‐modified S cathode effectively reconciles the thermodynamic and kinetic characteristics of LiPSs for adsorption and conversion, furthering the development of high‐performance Li–S batteries.

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“…2c. The two fitted Lorentzian peaks, located at 741 cm −1 (P1) and 747 cm −1 (P2), correspond to the dissociated TFSI − anions and the anionic cluster [Li(TFSI) 2 ] − , respectively [31,32]. The lower anionic cluster [Li(TFSI) 2 ] − content indicates more free Li + coordinated with ether oxygen atoms on the PEO chains, causing inefficient ion transport in the polymer matrix.…”

Section: Structural Characterization and Kinetics Of The Peo-based Composite Electrolytesmentioning

confidence: 99%

A strong Lewis acid imparts high ionic conductivity and interfacial stability to polymer composite electrolytes towards all-solid-state Li-metal batteries

Wang¹,

Zhong²,

Wen³

et al. 2022

Sci. China Mater.

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The development of high-performance solid polymer electrolytes is crucial for producing all-solid-state lithium metal batteries with high safety and high energy density. However, the low ionic conductivity of solid polymer electrolytes and their unstable electrolyte/electrode interfaces have hindered their widespread utilization. To address these critical challenges, a strong Lewis acid (aluminum fluoride (AlF 3 )) with dual functionality is introduced into poly(ethylene oxide) (PEO)-based polymer electrolyte. The AlF 3 facilitates the dissociation of lithium salt, increasing the iontransfer efficiency due to the Lewis acid-base interaction; further the in-situ formation of lithium fluoride-rich interfacial layer is promoted, which suppresses the uneven lithium deposition and continuous undesired reactions between the Li metal and PEO matrix. Benefiting from our rational design, the symmetric Li/Li battery with the modified electrolyte exhibits much longer cycling stability (over 3600 h) than that of the pure PEO/lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) electrolyte (550 h). Furthermore, the all-solid-state LiFePO 4 full cell with the composite electrolyte displays a much higher Coulombic efficiency (98.4% after 150 cycles) than that of the electrolyte without the AlF 3 additive (63.3% after 150 cycles) at a large voltage window of 2.4-4.2 V, demonstrating the improved interface and cycling stability of solid polymer lithium metal batteries.

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Nanocomposite with fast Li+ conducting percolation network: Solid polymer electrolyte with Li+ non-conducting filler

Cited by 80 publications

References 59 publications

High-Voltage and Wide-Temperature Lithium Metal Batteries Enabled by Ultrathin MOF-Derived Solid Polymer Electrolytes with Modulated Ion Transport

High-Voltage and Wide-Temperature Lithium Metal Batteries Enabled by Ultrathin MOF-Derived Solid Polymer Electrolytes with Modulated Ion Transport

Ni‐CeO₂ Heterostructures in Li‐S Batteries: A Balancing Act between Adsorption and Catalytic Conversion of Polysulfide

A strong Lewis acid imparts high ionic conductivity and interfacial stability to polymer composite electrolytes towards all-solid-state Li-metal batteries

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Nanocomposite with fast Li+ conducting percolation network: Solid polymer electrolyte with Li+ non-conducting filler

Cited by 80 publications

References 59 publications

High-Voltage and Wide-Temperature Lithium Metal Batteries Enabled by Ultrathin MOF-Derived Solid Polymer Electrolytes with Modulated Ion Transport

High-Voltage and Wide-Temperature Lithium Metal Batteries Enabled by Ultrathin MOF-Derived Solid Polymer Electrolytes with Modulated Ion Transport

Ni‐CeO2 Heterostructures in Li‐S Batteries: A Balancing Act between Adsorption and Catalytic Conversion of Polysulfide

A strong Lewis acid imparts high ionic conductivity and interfacial stability to polymer composite electrolytes towards all-solid-state Li-metal batteries

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Product

Resources

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Ni‐CeO₂ Heterostructures in Li‐S Batteries: A Balancing Act between Adsorption and Catalytic Conversion of Polysulfide