Download Lithium-Ion Batteries: Solid-Electrolyte Interphase by Perla B Balbuena, Yi Xuan Wang PDF
By Perla B Balbuena, Yi Xuan Wang
This ebook specializes in the mechanisms of formation of a solid-electrolyte interphase (SEI) at the electrode surfaces of lithium-ion batteries. The SEI movie is because of electrochemical aid of species found in the electrolyte. it's well known that the presence of the movie performs a vital position within the battery functionality, and its very nature can ascertain a longer (or shorter) existence for the battery. inspite of the various comparable study efforts, info at the balance of the SEI composition and its impression at the battery ability are nonetheless arguable. This ebook conscientiously analyzes and discusses the latest findings and advances in this subject.
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Extra info for Lithium-Ion Batteries: Solid-Electrolyte Interphase
Example text
80 It seems likely, therefore, that powders are unsuitable as models for SEI studies. To overcome this problem, SLX20 graphite was mixed with Teflon (5%) and pressed to pellets at 1 MPa/cm2. As can be seen from the SEM micrographs (Figure 13), such an electrode has well defined cross-section and basal graphite surfaces. 00 V vs Li/Li+ in LiPF6 EC:DEC electrolyte. Figure 13 SEM micrographs of cross-section and basal planes of the composite SLX20-based electrode. 6 eV and 286 eV are observed at the crosssection surface before sputtering (0 time) (Figure 14a).
In such structures the size of the crystallites is small and there is a high probability of random stacking (shifts or rotations) of adjacent carbon layers. This type of disorder is called turbostratic disorder. Hundreds of carbons are commercially available; however, selecting the best carbon for use in lithium-ion cells is a subject for much current research. 2 V positive of the reversible lithium potential. Evidence for hydrocarbon, carbonate and alkylcarbonate formation in the surface film is found with the help of combined XPS and SIMS analysis.
2/O2, and the anode consisted of a commercial 48 Lithium-Ion Batteries: Solid-Electrolyte Interphase graphite blend Cells were aged by storage under 60% charge at elevated temperatures. One of the primary failure mechanisms believed to occur in these cells is the formation of a passivating layer on the positive electrode that eventually leads to loss of electrical contact between active cathode particles. The NMR spectra show buildup of a solid-electrolyte interphase characterized by a relatively featureless absorption centered at 0 ppm.