Effect of an additive to polysiloxane-based electrolyte on passive film formation on a graphite electrode

Nakahara, Hiroyuki; Yoon, Sangyoung; Nutt, Steven

doi:10.1016/j.jpowsour.2005.09.050

Cited by 26 publications

(15 citation statements)

References 54 publications

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“…[446][447][448][449][450][451][452] The polysiloxane-based electrolyte (-[Me 2 SiO] m -[MeRSiO] n -) was also studied in the presence of LiTFSI, LiBOB, or LiPF 6 salt. [453][454][455][456] polysiloxane-based electrolytes with different of ethylene oxide (EO) substituted sidechains. Wang et al 457 synthesized a comb polysiloxane polymer by a reaction of polysiloxane and POEM in the presence of Pt catalyst.…”

Section: Silane or Siloxane Corementioning

confidence: 99%

Poly(ethylene oxide)-based electrolytes for lithium-ion batteries

2015

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This article reviews the PEO-based electrolytes for lithium-ion batteries.Poly(ethylene oxide) (PEO) based materials are widely considered as promising candidates of polymer hosts in solid-state electrolytes for high energy density secondary lithium batteries. They have several specific advantages such as high safety, easy fabrication, low cost, high energy density, good electrochemical stability, and excellent compatibility with lithium salt. However, the typical linear PEO does not reach the production requirement because its insufficient ionic conductivity due to the high crystallinity of the ethylene oxide (EO) chains, which can restrain the ionic transition due to the stiff structure especially at low temperature. The scientists have explored different approaches to reduce the crystallinity hence to improve the ionic conductivity of PEO-based electrolytes, including: blending, modifying and making PEO derivatives etc. This review is focused on surveying the recent developments and issues about PEO-based electrolytes for lithium-ion batteries.

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Section: Silane or Siloxane Corementioning

confidence: 99%

Poly(ethylene oxide)-based electrolytes for lithium-ion batteries

2015

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“…While LiFTSI and LiBOB in a polysiloxane solvent, form a disordered matrix and a gel-like/island film SEI morphologies, respectively (Fig. 4), that accumulate on the HOPG surface [94]. The electrolyte salts: LiCF 3 SO 3 , LiBF 4 , LiN(SO 2 CF 3 ) 2 , LiClO 4 , and LiTFSI are reported to form a leaky SEI layers on the graphite electrode surface in carbonate solvents [24e27], which can be a source of recyclable lithium ions loss [95e97].…”

Section: Morphology Of the Sei Layermentioning

confidence: 99%

The formation and stability of the solid electrolyte interface on the graphite anode

Agubra

Fergus

2014

Journal of Power Sources

427

314

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“…6 Regarding the development of alternative liquid electrolytes to improve safety, low viscosity siliconcontaining liquids have drawn much attention due to their nontoxic nature and reduced flammability. So far, published results mainly focus on carbonate-modified [7][8][9] and ethylene glycol-modified [10][11][12][13][14][15] di-/trisiloxanes and silyl ether compounds. [16][17][18] Their structure derived from EC/PC, and from poly(ethylene oxide) (PEO), an ion-conducting polymer already widely used in solid polymer electrolytes (SPE) since 1973.…”

Section: Introductionmentioning

confidence: 99%

Computational study of structural properties of lithium cation complexes with carbamate-modified disiloxanes

Jeschke

Wiemhöfer

Mück‐Lichtenfeld

2014

Phys. Chem. Chem. Phys.

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Lithium cation solvation structures [Li(S)(n=1-4)](+) with ligands of cyclic or noncyclic carbamate-modified disiloxanes are optimized at B3LYP level of theory and compared to their corresponding simplified carbamates and to the organic carbonates ethylene carbonate (EC) and dimethyl carbonate (DMC). The electrostatic potentials (ESP) of these investigated carbonyl-containing solvents are mapped on the electron density surface. The maximum ESP is located at the C=O-oxygen, whereas the disiloxane functionality represents an unpolar residue. Natural Bond Orbitals (NBO) analysis reveals strong n(N) →π(C[double bond, length as m-dash]O) donor-acceptor interactions in carbamates which outrun dipolar properties. As a result, higher total binding energies (ΔE(B)) for solvation of Li(+) in carbamates (-148 kcal mol(-1)) are found than for carbonates (-137 kcal mol(-1)). Furthermore, the disiloxane moiety with its Si-O bond is stabilized by n(O) →σ*(Si-C) hyperconjugation that provides additional electron density to a nearby SiCH3 methyl group thus supporting an additional SiCH2-H...Li(+) coordination. The formation of all investigated solvation structures is exothermic. Owing to steric hindrance of noncyclic carbonyl-containing ligands and the bulky disiloxane functionality, the solvation structure [Li(S)3](+) is the preferred structure according to Gibbs free energy ΔG(B) results.

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Effect of an additive to polysiloxane-based electrolyte on passive film formation on a graphite electrode

Cited by 26 publications

References 54 publications

Poly(ethylene oxide)-based electrolytes for lithium-ion batteries

Poly(ethylene oxide)-based electrolytes for lithium-ion batteries

The formation and stability of the solid electrolyte interface on the graphite anode

Computational study of structural properties of lithium cation complexes with carbamate-modified disiloxanes

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