New insights into the interactions between electrode materials and electrolyte solutions for advanced nonaqueous batteries

Aurbach, Doron; Markovsky, Boris; Levi, Mikhael D.; Levi, Elena; Schechter, Alex; Moshkovich, M.; Cohen, Yair

doi:10.1016/s0378-7753(99)00187-1

Cited by 450 publications

(385 citation statements)

References 15 publications

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“…The higher heat evolution can be attributed to the fact that the system with 20 % EC probably has a less compact (more porous) SEI, since it is mainly the decomposition product of EC (CH 2 OCO 2 Li) 2 and Li 2 CO 3 , which are regarded as the species responsible for providing a compact and passivating SEI [25]. This would allow for easier diffusion of lithium from the graphite structure to the surface, consequently causing reactions with the electrolyte to form stable species (like LiF and Li 2 CO 3 ).…”

Section: Resultsmentioning

confidence: 99%

Edge/basal/defect ratios in graphite and their influence on the thermal stability of lithium ion batteries

Foss

Svensson

Sunde

et al. 2016

Journal of Power Sources

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Raw graphite can be processed industrially in large quanta but for the graphite to be useful in lithium ion batteries (LIB's) certain parameters needs to be optimized. Some key parameters are graphite morphology, active surface area, and particle size. These parameters can to some extent be manipulated by surface coatings, milling processes and heat treatment in various atmospheres. Industrial graphite materials have been investigated for use as anode material in LIB's and compared with commercial graphite. These materials have been exposed to two different milling processes, and some of these materials were further heat treated in nitrogen atmosphere above 2650 o C. BET combined with density functional theory (DFT) has been employed to study the ratio of basal to non-basal plane and to determine the relative amount of defects. Thermal properties have been investigated with differential scanning calorimetry (DSC). High ethylene carbonate (EC) content improved the thermal stability for graphite with high amount of edge/defect surface area, but showed no improvement of graphite with lower amount of edge/defects. High irreversible capacity loss (ICL) combined with low surface area improved the thermal properties. DFT combined with ICL could potentially be used as a tool to predict thermal stability.

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Section: Resultsmentioning

confidence: 99%

Edge/basal/defect ratios in graphite and their influence on the thermal stability of lithium ion batteries

Foss

Svensson

Sunde

et al. 2016

Journal of Power Sources

View full text Add to dashboard Cite

show abstract

“…Continued decomposition and re-growth of the protective layer result in the consumption of both electrolyte and anode material. This accelerates the capacity fade of the batteries and causes exothermic reactions that eventually lead to thermal runaway [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Graft copolymer-based lithium-ion battery for high-temperature operation

Osswald

Daniel

et al. 2011

Journal of Power Sources

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“…[6][7][8] They found that there were obvious differences in the composition and thickness for the SEI films on the different planes, and deduced that solvents were preferentially reduced on the basal plane and the salt anions on the edge plane. Aurbach et al [9][10][11][12][13][14][15][16][17][18] used XPS, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive analysis by X-ray (EDAX), X-ray diffraction (XRD), and electrochemical impendence spectroscopy (EIS) etc. to systematically investigate the SEI film in different electrolytes and on different electrode surfaces.…”

Section: Introductionmentioning

confidence: 99%

New Insight into the Solid Electrolyte Interphase with Use of a Focused Ion Beam

Zhang

Liu

et al. 2005

J. Phys. Chem. B

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The formation and evolution of the solid electrolyte interphase (SEI) film on the surface of natural graphite spheres in the electrolyte of 1 M LiPF 6 in ethylene carbonate (EC) and dimethyl carbonate (DMC) (volume ratio 1:1) were investigated with use of focused ion beam (FIB) technology. Secondary electron FIB images clearly show the surface and cross-section morphology of the SEI film. The composition variation along the surface and cross section of the SEI film was also explored by the elemental line scan analysis (ELSA). The initial SEI film with an apparent thickness range of ∼450 to ∼980 nm is rough in morphology and nonuniform in composition, and contains small splits. After certain electrochemical cycles, the thickened SEI film displays microscale holes and obvious cracks on the surface, and the content of organic compounds increases. In addition, the concept of "internal SEI film" is first proposed based on the characterization of the cross section of the natural graphite spheres with the aid of FIB. Finally, the capacity fading mechanisms of the natural graphite spheres corresponding to different electrochemical stages are discussed.

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New insights into the interactions between electrode materials and electrolyte solutions for advanced nonaqueous batteries

Cited by 450 publications

References 15 publications

Edge/basal/defect ratios in graphite and their influence on the thermal stability of lithium ion batteries

Edge/basal/defect ratios in graphite and their influence on the thermal stability of lithium ion batteries

Graft copolymer-based lithium-ion battery for high-temperature operation

New Insight into the Solid Electrolyte Interphase with Use of a Focused Ion Beam

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