Electrochemical and Chemical Synthesis of [ZnTCNQF4(DMF)2]·2DMF – A 2D Network Coordination Polymer

Tran, M. D.; Lu, Jinzhen; Bay, Mai Van; Nguyen, Vo Thang; Le, Hai Tu; Bond, Alan M.; Martin, Lisandra L.

doi:10.1002/ejic.201900431

Cited by 2 publications

(1 citation statement)

References 45 publications

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“…42 The digital photographs display that the LiTFSI/ PEI/PVP/PVDF polymer electrolyte becomes completely solid after drying (Figure 2g). The infrared spectra show that the ν ̅ (H−CO) peak 43 of DMF disappears after drying the polymer electrolyte, indicating that DMF is all removed. As is well-known, 44,45 the amorphous region is the main structure of the Li + migration in the polymer electrolyte.…”

Section: Resultsmentioning

confidence: 99%

Improving Fast and Safe Transfer of Lithium Ions in Solid-State Lithium Batteries by Porosity and Channel Structure of Polymer Electrolyte

Shan

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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Solid-state lithium batteries using solid polymer electrolytes can improve the safety and energy density of batteries. Smoother lithium-ion channels are necessary for solid polymer electrolytes with high ionic conductivity. The porosity and channel structure of the polymer film affect the transfer of lithium ions. However, their controllable synthesis remains a big challenge. Here, we developed a simple synthesis approach toward wrinkled microporous polymer electrolytes by combining the amphoteric (water solubility and organic solubility) polymer in three polymer blends. The homogeneous blend solution spontaneously wrinkled to vertical fold channels as the solvent evaporated. Two minor polymers, poly(vinyl pyrrolidone) (PVP) and polyetherimide (PEI), formed close stacks, and Janus PVP was dispersed in the poly(vinylidene fluoride) (PVDF) matrix. The interfacial tensions between the three polymers were different, so stress was produced when they solidified. The solvent was evaporated to the top layer of the polymers when the temperature increased. The bottom layer wrinkled owing to the stress during solidification. The evaporation of the solvent generated micropores to form the lithium-ion channel. They helped Li + transference and created a wrinkled microporous PVDF-based polymer electrolyte, which achieved an ionic conductivity of 5.1 × 10 −4 S cm −1 and a lithium-ion transference number of 0.51 at room temperature. Meanwhile, the good flame retardancy and tensile strength of the polymer electrolyte film can improve the safety of the battery. At 0.5C and room temperature, the batteries with a LiFePO 4 cathode and the wrinkled microporous LiTFSI/PEI/PVP/PVDF electrolyte reached a high discharge specific capacity of 122.1 mAh g −1 at the 100th cycle with a Coulombic efficiency of above 99%. The results of tensile and self-extinguishing tests show that the polymer electrolyte film has good safety application prospects.

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Section: Resultsmentioning

confidence: 99%

Improving Fast and Safe Transfer of Lithium Ions in Solid-State Lithium Batteries by Porosity and Channel Structure of Polymer Electrolyte

Shan

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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Experimental determination of relationship between intramolecular bond lengths and their stretching vibrational frequencies of N,N-dimethylformamide and acetonitrile molecules in the liquid state

Kameda,

Amo,

Usuki

et al. 2023

Bulletin of the Chemical Society of Japan

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Time-of-flight (TOF) neutron diffraction measurements have been carried out on pure liquid deuterated N, N-dimethylformamide (DMF-d7), acetonitrile (AN-d3) and their concentrated LiTFSA solutions to investigate the effect of intermolecular interaction to intramolecular bond lengths, rCO, of the DMF and rCN of the AN molecules in the liquid state. Intramolecular parameters of DMF and AN are determined by the least squares fitting analyses of neutron total interference terms observed in the high-Q region. Attenuated total reflection (ATR) IR spectra have been measured for pure liquid DMF, AN and their LiTFSA solutions of natural abundances to determine the average C = O and C≡N stretching vibrational frequencies (νCO and νCN) of the DMF and AN molecules, respectively. The relationships between rCO and νCO for DMF, and between rCN and νCN for AN, are well approximated by linear functions. The value, dνCO/drCO = -3400 ± 1600 cm-1.Å-1 has been derived for DMF from the slope of the fitted function. dνCN/drCN = -7000 ± 3000 cm-1.Å-1 has been obtained for AN. It has been revealed that the C = O bond length of the DMF and C≡N one of the AN molecules are sensitively affected by intermolecular interaction.

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Electrochemical and Chemical Synthesis of [ZnTCNQF₄(DMF)₂]·2DMF – A 2D Network Coordination Polymer

Cited by 2 publications

References 45 publications

Improving Fast and Safe Transfer of Lithium Ions in Solid-State Lithium Batteries by Porosity and Channel Structure of Polymer Electrolyte

Improving Fast and Safe Transfer of Lithium Ions in Solid-State Lithium Batteries by Porosity and Channel Structure of Polymer Electrolyte

Experimental determination of relationship between intramolecular bond lengths and their stretching vibrational frequencies of N,N-dimethylformamide and acetonitrile molecules in the liquid state

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