First characterization of the surface compounds formed during the reduction of a carbonaceous electrode in LiClO4-ethylene carbonate electrolyte

Naji, A.; Ghanbaja, Jaâfar; Willmann, P.; Humbert, Bernard; Billaud, D.

doi:10.1016/s0378-7753(96)02401-9

Cited by 28 publications

(21 citation statements)

References 8 publications

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“…The SEI morphology formed is influenced by the electrode material, electrolytes salts, and solvents involved. For instance, the electrolyte salts LiClO 4 and LiTFSI, form porous and spongy SEI morphologies [70,93] with carbonate solvents on a graphite anode. While LiFTSI and LiBOB in a polysiloxane solvent, form a disordered matrix and a gel-like/island film SEI morphologies, respectively (Fig.…”

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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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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“…34 These characteristic peaks are originated from the alkyl carbonates, C 2 H 5 OCOOK and (CH 2 OCO 2 K) 2 , the reduction products of EC and DEC in the SEI layer. 31,[35][36][37] It could be clearly observed that the peak located at 835 cm -1 , ascribed to the bending mode of -OCO 2 , and the peaks located at 1300 and 1659 cm -1 , assigned to the symmetric/asymmetric stretching modes of C=O, are much weaker in KFSI-induced SEI layer than that in KPF 6 -induced SEI. These observations indicate more ROCO 2 K in KPF 6 -induced SEI layer because of severe reduction of EC and DEC solvents.…”

Section: Resultsmentioning

confidence: 95%

“…Therefore, the electrode is easily to be attacked by the electrolyte, resulting in inferior stability of the KPF 6 containing cells. [35][36][37] In addition, for KFSI-induced SEI, the peaks positioned at ~1190 and ~1388 cm -1 for KFSI-induced SEI (Fig. 4a) likely originate from the reduction products, like KFSO 2 and KNSO 2 .…”

Section: Resultsmentioning

confidence: 99%

A Depth-Profiling Study on the Solid Electrolyte Interface: Bis(fluorosulfuryl)imide Anion toward Improved K⁺ Storage

Wang

Chen³

et al. 2019

ACS Appl. Energy Mater.

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Solid electrolyte interface (SEI) significantly affects alkaline metal ion battery performance in terms of reversible capacity, columbic efficiency and cycling stability.However, intrinsic properties of SEI layer in potassium ion batteries (KIBs), including structures, components, formation mechanism and corresponding K + storage behavior, are poorly understood. Here, we focus on the effect of electrolyte on SEI formation and K + storage behavior in self-supported nitrogen-doped graphite foams (NGFs).Two types of organic electrolytes, KPF 6 and KN(SO 2 F) 2 (KFSI) salt in EC/DEC solution, were carefully selected and compared in detail to reveal the effect of SEI on K + ion storage mechanism. The experimental results, including in-situ electrochemical evaluations and depth-profiling XPS analysis, demonstrate that the salts of KFSI result in a more uniform, stable and thinner SEI layer compared with the SEI induced by KPF 6 . Particularly, the KFSI-induced SEI is rich in stable and uniformly distributed inorganic species and polycarbonates, whereas the KPF 6induced SEI is mainly composed of instable alkyl carbonates. This could be attributed to the larger FSIsize over PF 6and lower LUMO levels than solvents according to theoretical calculations, which effectively prevent SEI from co-intercalation damage and thus leading to high stability of the as-obtained SEI layer. In general, the abovementioned features could ensure high reversibility and good cycling stability of the self-supported NGFs electrode in KFSI-based electrolyte.

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“…After the first cycle, peaks a and b disappear, implying that peaks a and b are attributed to the formation of the SEI film on the surface of the graphite. According to Naji et al [40,41], the reduction process of EC mainly includes two steps.…”

Section: And Lsv Resultsmentioning

confidence: 99%

Influence of vinylene carbonate as an additive on the electrochemical performances of graphite electrode in poly(methyl methacrylate) gel polymer electrolytes

et al. 2015

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Thermal initiation polymerization was used and optimized to prepare poly(methyl methacrylate) gel polymer electrolytes (PMMA-GPE). The impact of vinylene carbonate (VC) on the electrochemical performance of mesophase-pitch-based carbon fibers in PMMA-GPE for lithium-ion batteries was investigated using cyclic voltammetry (CV), linear sweep voltammetry (LSV) and charge-discharge test. As expected, adding VC with a proper concentration of 1 vol% into GPE results in better electrolyte conductivity, cycling performance, and reversible capacity. Combining with Scanning electron microscopy, LSV and CV, detailed EIS investigation was used in order to better understand the modified mechanisms of graphite electrode in GPE with VC. The results reveal that the improvement of electrochemical performance is mainly due to the effective inhibition on growth of the internal resistance, which mainly attributed to the solid electrolyte interphase with an electrochemically and structurally stability mainly formed by the reduction and polymerization of VC at higher potential as restraining the side reaction of the reduction and polymerization of matrix in GPE.

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First characterization of the surface compounds formed during the reduction of a carbonaceous electrode in LiClO4-ethylene carbonate electrolyte

Cited by 28 publications

References 8 publications

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

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

A Depth-Profiling Study on the Solid Electrolyte Interface: Bis(fluorosulfuryl)imide Anion toward Improved K⁺ Storage

Influence of vinylene carbonate as an additive on the electrochemical performances of graphite electrode in poly(methyl methacrylate) gel polymer electrolytes

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First characterization of the surface compounds formed during the reduction of a carbonaceous electrode in LiClO4-ethylene carbonate electrolyte

Cited by 28 publications

References 8 publications

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

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

A Depth-Profiling Study on the Solid Electrolyte Interface: Bis(fluorosulfuryl)imide Anion toward Improved K+ Storage

Influence of vinylene carbonate as an additive on the electrochemical performances of graphite electrode in poly(methyl methacrylate) gel polymer electrolytes

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A Depth-Profiling Study on the Solid Electrolyte Interface: Bis(fluorosulfuryl)imide Anion toward Improved K⁺ Storage