Deposition and Dissolution of Lithium through Lithium Phosphorus Oxynitride Thin Film in Lithium Bis(trifluoromethylsulfonyl)amide-Glyme Solvate Ionic Liquid

Tachikawa, Naoki; Furuya, Ryota; Yoshii, Kazuki; Watanabe, Masayoshi; Katayama, Yasushi

doi:10.5796/electrochemistry.83.846

Cited by 4 publications

(4 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The broad and small reductive current that was observed during the first cycle might have resulted from the decomposition of [P 2225 ][TFSA] to form a solid electrolyte interphase (SEI) on the electrode. 51 Indeed, the reductive decomposition was suppressed during subsequent cycles, implying the formation of SEI passivation film on the electrode. We calculated the Coulombic efficiency from the CV results for both gel and solution systems (Figure S2).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The CV behavior (i.e., Li deposition/dissolution reaction) seen in the ion gel was comparable to that in the corresponding solution system (Figure S1). The broad and small reductive current that was observed during the first cycle might have resulted from the decomposition of [P 2225 ][TFSA] to form a solid electrolyte interphase (SEI) on the electrode . Indeed, the reductive decomposition was suppressed during subsequent cycles, implying the formation of SEI passivation film on the electrode.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Polymer Gel Electrolyte Prepared by “Salting-In” Poly(ethylene glycol) into a Phosphonium-Based Ionic Liquid with a Lithium Salt

Matsuura

Shibata

Han

et al. 2020

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

We report the synthesis of an ion gel electrolyte based on a tetra-arm poly(ethylene glycol) (TetraPEG) network in a phosphonium-based ionic liquid (IL) solution utilizing the "salting-in" effect with a Li salt. Poly(ethylene glycol) (PEG) chains are insoluble in phosphonium-based ILs (such as triethylpentylphosphonium bis(trifluoromethanesulfonyl)amide, [P 2225 ][TFSA]); however, the addition of LiTFSA enabled complete solvation of TetraPEG into a [P 2225 ][TFSA] solution. The Li salt and polymer concentration dependences for PEG solubility in a [P 2225 ][TFSA] system were investigated, and the optimum concentrations for polymer gel electrolyte preparation were elucidated. The gelation reaction (Michael addition between tetra-maleimide-terminated and tetra-thiol-terminated PEGs) of TetraPEG prepolymers in LiTFSA/[P 2225 ][TFSA] solutions was characterized via chemical reaction kinetics to determine the apparent gelation rate constant (k gel ′), and the reaction efficiency (p) was estimated to be p ∼ 95% at the end of the reaction. The resulting nearly defect-free TetraPEG gel electrolyte polymer network showed high ionic conductivity, comparable to the corresponding solution electrolyte. The TetraPEG gel electrolyte containing LiTFSA/[P 2225 ][TFSA] also possessed a wide electrochemical window (∼4.2 V vs Li/Li + ), thus allowing the reversible Li deposition/dissolution reaction to be performed using typical metal negative electrodes.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Polymer Gel Electrolyte Prepared by “Salting-In” Poly(ethylene glycol) into a Phosphonium-Based Ionic Liquid with a Lithium Salt

Matsuura

Shibata

Han

et al. 2020

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

“…We have been investigating the deposition and dissolution of metallic lithium using pyrrolidinium-based RTILs and solvated ionic liquids as electrolytes. 74,75 For example, we have shown that the use of lithium phosphorus oxynitride as an artificial solid electrolyte interphase on an electrode suppresses the reductive decomposition of the electrolyte and increases the Coulombic efficiency of the deposition and dissolution of metallic lithium in RTILs.…”

Section: Rtils As Electrolytes For Secondary Batteriesmentioning

confidence: 99%

Electrodeposition of Metals and Preparation of Metal Nanoparticles in Nonaqueous Electrolytes and Their Application to Energy Devices

Yoshii

2021

Electrochemistry

Self Cite

View full text Add to dashboard Cite

Nonaqueous electrolytes are used in various electrochemical devices as their electrochemical potential window is wider than that of aqueous electrolytes. Electrochemical reactions significantly change depending on the combination of nonaqueous solvent and salt and the dissolved state of the metal ions or redox species in the solvent. Room-temperature ionic liquids (RTILs), a type of nonaqueous solvent, have unique physicochemical properties such as negligible vapor pressure and non-flammability. Their application as reaction media for a variety of reactions, including electrochemical reactions has attracted significant interest, as they enable reactions that cannot proceed in water or organic solvents.We have been researching materials synthesis and energy devices using RTILs and organic electrolytes.Herein, we comprehensively review our research on the electrodeposition of metals, preparation of metal nanoparticles, and secondary batteries using nonaqueous electrolytes.

show abstract

“…Li metal having the theoretical specific capacity of 3861 mAh g ¹1 is also attractive to realize high specific capacity of the Li-S battery. Although fundamental studies on the electrochemical deposition and dissolution of Li have been reported so far, 14,15 there is no literature about the charge-discharge cycle of the Li anode in the LiTFSA-G4 solvate ionic liquid. It is well-known that the volumetric expansion associated with the whisker-like deposition of Li metal occurs during the charge process, leading to the short circuit of the cell in conventional electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Deposition and Dissolution of Lithium on a Carbon Fiber Composite Electrode in a Solvate Ionic Liquid

et al. 2017

Self Cite

View full text Add to dashboard Cite

Electrochemical deposition and dissolution of Li metal on a carbon fiber composite electrode were investigated in lithium bis(trifluoromethylsulfonyl)amide-tetraglyme solvate ionic liquid electrolyte. The carbon fiber composite coated on a Cu substrate was composed of vapor-grown carbon fiber (VGCF ® -H) and poly(vinylidene fluoride). The coulombic efficiency for dissolution of Li deposits on the VGCF ® -H modified Cu electrode was kept more than 98% at 100th cycle and higher than that on a Cu electrode in the solvate ionic liquid. Li was deposited in the porous structure of the VGCF ® -H modified Cu electrode and scarcely observed on the surface of the VGCF ® -H modified Cu probably because the overpotential for the reduction of Li is smaller on the Cu substrate and/or deposited Li than that on the cylindrical basal plane of VGCF ® -H. This result suggests that the voids in the carbon fiber network effectively act as the Li deposition sites at the electrode|separator interface in the coin cell.

show abstract

Deposition and Dissolution of Lithium through Lithium Phosphorus Oxynitride Thin Film in Lithium Bis(trifluoromethylsulfonyl)amide-Glyme Solvate Ionic Liquid

Cited by 4 publications

References 31 publications

Polymer Gel Electrolyte Prepared by “Salting-In” Poly(ethylene glycol) into a Phosphonium-Based Ionic Liquid with a Lithium Salt

Polymer Gel Electrolyte Prepared by “Salting-In” Poly(ethylene glycol) into a Phosphonium-Based Ionic Liquid with a Lithium Salt

Electrodeposition of Metals and Preparation of Metal Nanoparticles in Nonaqueous Electrolytes and Their Application to Energy Devices

Electrochemical Deposition and Dissolution of Lithium on a Carbon Fiber Composite Electrode in a Solvate Ionic Liquid

Contact Info

Product

Resources

About