The novel mixed-valence vanadium oxide V10O24 center dot 12H(2)O nano-structure were prepared by Sol-Gel process with the industrial V2O5 powder as the starting materials and a simple peroxyde reaction route in this paper, and the formation mechanism has been clarified. XRD, TEM, TG-DSC, FTIR and XPS measurements were used to obtain structure and infrared vibration of the V10O24 center dot 12H(2)O. The analyses showed that the V10O24 center dot 12H(2)O have a nano-structure with porous, and the diameter about 40-60 nm. The infrared absorption properties were discussed based on the vibration model and the change of bond length before and after reaction. It has reveal that shift of the absorption peaks of the V10O24 center dot 12H(2)O was caused by the lattice expansion and formation of low valence vanadium ion in V10O24 center dot 12H(2)O. This mixed-valence vanadium oxide has a nanoporous structure which make it a potential candidate to be used as cathode in lithium-based batteries.

Miscible mixtures of poly(methyl methacrylate)(PMMA)and di-octylphthalate(DOP)are investigated over the range 0%~20wt% of DOP.The glass transition temperature(Tg)and relaxational behavior are characterized by differential scanning calorimetry(DSC)and dynamic mechanical analysis(DMA).Increase in DOP content improves the plasticization of PMMA,as revealed by the decrease of both Tg and α relaxation temperature.In the β relaxation region,the amplitude of E″ loss peak is almost independent of the DOP content,showing the absence of any antiplasticization effect.This result is in good agreement with the intramolecular character of the PMMA β relaxation motions.DMA spectra also reveals,at low temperature,the occurrence of highly localized motions ascribed to the PMMA γ relaxation.The plastic behavior of DOP/PMMA is deduced from compression tests.Use of the reduced temperature Tg-T for inspecting the plots at variable DOP content shows that σpf is controlled by the α motions all over the temperature range,whereas σy is governed by the β motions at low temperature and by the α motions while approaching Tg.Except at low temperature,all the DOP/PMMA samples exhibit a quite low SSA,in connection with the presence of a strong β relaxation.

Ambient pressure dried V2O5 aerogels are prepared from crystalline V2O5 and H2O2(30wt%) by sol-gel method and solvent exchange process.The microstructure,crystalline structure and vibration modes of the V2O5 aerogels are investigated by SEM,TEM,XRD,FTIR and Raman.The experimental results show that ambient dried V2O5 aerogels exhibit a fibrous microstructure,the distance of inter-layers increases distinctly,and the average pore diameter is about 16nm.These properties indicate that the ambient pressure dried V2O5 aerogels can be used as good cathode material for lithium batteries.

Lithium vanadium oxide nanotubes as cathode materials for rechargeable lithium batteries were ME prepared via a sol-gel reaction followed by hydrothermal treatment, in which V2O5 and LiOH center dot H2O were used as raw materials and C16H33NH2 as structure-directing template. Structure and morphology of the nanotubes were investigated by SEM, TEM, XRD, FT-IR and XPS. Meantime, electrochemical behavior of the materials was researched by cyclic voltammetry. The results show that the inner and the outer diameters of the obtained nanotubes are of about 30nm and 70nm with length between 1 mu m to 3 mu m, respectively. It is also confirmed by XPS that the elements of the products are made up of various chemical states. The electrochemical performance indicates that the obtained nanotubes as cathode materials for rechargeable lithium batteries have good lithium-ion insertion/deinsertion reversibility.

The novel vanadium oxide V10O24·12H2O is prepared by sol-gel process and solvent exchange process with the industrial V2O5 powder as the starting materials and a simple peroxidation route.The structure and AC impedance properties of V10O24·12H2O are clarified.It's shown that V10O24·12H2O has a layer structure with V5+and V4+ mixed.New equivalent circuits modeling are proposed to fit the experimental electrochemical impedance spectroscopies,and the fitting results are in agreement with the experimental results.This vanadium oxide is a potential candidate to be used as new power sources materials owing to its structure and electrochemical properties.

0.2% Nb_2O_5 doped Ba(Zr_(0.15)Ti_(0.85))O_3 relaxor ferroelectric ceramic was prepared by a traditional solid phase reaction;the frequency dependences of dielectric constant at different temperatures were measured;the temperature and frequency dependences of dielectric constant were discussed,the result showed that a dissymmetrical distribution of several relaxor times is induced by the asymmetrical internal structure of Nb doped BZT ceramic,the practical ColeCole plot obtained is not a semicircle but a mouse shape,and a relaxor behavior was also observed in BZT with Zr content reaching 0.15.As the influence of leakage current,the tgδ-T curve increases at the higher temperature.