Effect of Ni and Cu Substitution on the Crystal Structure, Morphology and Electrochemical Performance of Spinel LiMn2O4

Sintesis nanofiber komposit Zn-PVDF kopolimer dengan metoda elektrospinning telah berhasil dilakukan. Proses pembuatan nanofiber komposit serta morfologi yang terbentuk dipengaruhi oleh penambahan Zn-asetat dengan perubahan diameter rata-rata serat dari 357,13 nm menjadi 777,24 nm. Analisis FTIR menunjukkan bahwa struktur kristal nanofiber komposit Zn-PVDF kopolimer didominasi oleh strukturβ-phase, dengan bilangan gelombang 1190,08 cm-1 dan 487,99 cm-1 untuk struktur α-phase dan 1404,18 cm-1; 1280,73 cm-1; 1074,35 cm-1; 881,47 cm-1; dan 840,96 cm-1 untuk struktur β-phase.Kata kunci :nanofiber komposit, Zn-PVDF kopolimer komposit, elektrospinning,kristal struktur, morfologi, diameter fiber The fabrication of Zn-PVDF copolymer nanofiber composite has been investigated in this research study by using electrospinning method. Fabrication and morphology of nanofiber composite is influenced by the addition of Zn-acetate. The average diameter of nanofiber composites increase with an addition of Zn-acetate, from 357,13 to 777,24nm. FTIRanalysisshowedthat thecrystalstructure ofPVDFnanofiberis dominatedby β-phase , thewave number 1190,08 cm-1 and 487,99 cm-1 for α-phase structure and 1404,18cm-1; 1280,73cm-1; 1074,35cm-1; 881,47cm-1and840,96cm-1 for β-phase structure respectively.Key words : nanofiber composite, Zn-PVDF copolymer composite, electrospinning, crystal structure, morphology, fiber diameter

Download Full-text

Influence of Laser Incident Energy on Chemical Composition, Crystal Structure, Morphology and Band Gap of Cu2ZnSnS4 Thin Films by Pulsed Laser Deposition

Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology (2012) ◽

10.2991/emeit.2012.237 ◽

2012 ◽

Author(s):

Yanan Wen ◽

Lin Li ◽

Yan Dong ◽

Min Yao ◽

Qi Liang

Keyword(s):

Crystal Structure ◽

Thin Films ◽

Chemical Composition ◽

Pulsed Laser Deposition ◽

Band Gap ◽

Incident Energy ◽

Pulsed Laser ◽

Laser Deposition ◽

Structure Morphology

Download Full-text

Effect of High Levels of Impurity Calcium on the Electrochemical Performance of Spinel LiMn2O4

Proceedings of the 4th 2016 International Conference on Material Science and Engineering (ICMSE 2016) ◽

10.2991/icmse-16.2016.84 ◽

2016 ◽

Author(s):

Xing Zou ◽

Peng Wu ◽

Hai-Chao Xie

Keyword(s):

Electrochemical Performance ◽

Spinel Limn2o4

Download Full-text

The influence of multifunctional microalloyed ceramics microstructure on its capacity properties

Serbian Journal of Electrical Engineering ◽

10.2298/sjee180203003p ◽

2018 ◽

Vol 15 (2) ◽

pp. 187-199

Author(s):

Jelena Purenovic ◽

Nedeljko Ducic ◽

Branko Matovic ◽

Milovan Purenovic

Keyword(s):

Crystal Structure ◽

Dielectric Constant ◽

Electrical Properties ◽

Electrical Resistance ◽

Ceramic Materials ◽

Porous Ceramics ◽

Electrophysical Properties ◽

Microstructural Properties ◽

Structure Morphology ◽

Composition Structure

Modified porous alumo-silicate ceramics, alloyed with magnesium and microalloyed with aluminum, belongs to modern multifunctional ceramic materials. Microalloying has led to important changes in dielectric and electrical properties of ceramics, such as dielectric constant and electrical resistance. These changes are conditioned by the microstructural properties of modified porous ceramics. The obtained results have shown the unity of the influence of composition, structure, morphology and application of microalloyed multifunctional alumosilicate ceramics on electrophysical properties. Microstructural investigations have shown that this type of ceramics has an amorphous-crystal structure, which causes important changes in its electrical properties and affects its activity. Therefore the ceramics can be considered as an active dielectric. A correlation between microstructural properties and structurally sensitive, i.e. electrophysical properties of microalloyed multifunctional alumo-silicate ceramics, was confirmed.

Download Full-text