Chemically bonded SEI

Figure 8. The formation of a chemically bonded SEI at the zig-zag and armchair faces (schematic presentation of an organic carbonate-based electrolyte) [25],...

Graphite Modification by Mild Oxidation and Chemically Bonded (CB) SEI... 

Mild oxidation of graphite was found to improve anode performance. Improvement was attributed to the formation of SEI chemically bonded to the surface carboxylic and oxide groups at the zig-zag and armchair faces, better wetting by the electrolyte and to accommodation of extra lithium at the zig-zag, armchair and other edge sites and nanovoids. Graphite-surface modification by silylation and the creation of the core-shell-structured carbon composite look promising for the enhancement of electrochemical performance. 

Bond length between As and its nearest-neighbor in GexASj,Sei, f glasses. Reprinted with permission from Sen S. and Aitken B. G., Atomic structure and chemical order in Ge-As selenide and sulfoselenide glasses an x-ray absorption fine structure spectroscopic study, Phys. Rev. B, 66, 134204-10 (2002). Cop3n-ight (2002) by the American Physical Society. 

It is reasonable to conclude that in Se-rich, chemical stoichiometric and slightly Se-poor (<30%) Ge (As Sei.x. ternary glasses, Ge is bonded only to Se atoms, forming GeSe4 polyhedra, and As is predominantly heteropolar-bonded to Se, forming AsSe3/2... 

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