Rate capability of lithium intercalation into nano-porous graphitized carbons

Nano-porous graphitized carbons were successfully prepared by using mono-dispersed SiO2 colloidal crystal as a template and mesophase pitch as a carbon source with final heat treatment temperatures (HTT) of 1000?2500 °C. Rate capability of lithium intercalation/de-intercalation of the nano-porous graphitized carbons was investigated. 35?60% of capacities were retained when the current density was increased from 37.2 mA g? 1 to 372 mA g? 1. Electrochemical impedance spectra indicated that formation of SEI layers caused increased polarization

新奇メソ構造材料（バナジン酸－ポリエチレングリコール複合体）の設計

A new method for designing nanomodified inorganic-organic materials is proposed, and one example of synthesizing mesostructured vanadate-poly(ethylene glycol) composite is demonstrated. Commercially available poly (ethylene glycol) was changed in its terminal hydroxy group(s) to ammonium head group by two-step sequential tosylation/nucleophilic substitution in order to enable connection with the vanadate framework component. Selforganization of vanadate and the new organic template was successfully processed in the aqueous mixture to precipitate as a composite by adding sodium chloride. We discuss not only the design of a mesostructured material, but also the reasonable treatment for obtaining it from the mixture by the same technique as the volume shrinkage of an amphiphilic block copolymer in water