Comparison of Lini0.5Mn1.5O4 and LiMn2O4 for Lithium-Ion Battery

2013 ◽  
Vol 860-863 ◽  
pp. 956-959
Author(s):  
Xing Hua Liang ◽  
Lin Shi ◽  
Yu Si Liu ◽  
Tian Jiao Liu ◽  
Chao Chao Ye ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Electron Microscope ◽  
Solid State ◽  
Scanning Electron Microscope ◽  
Retention Rate ◽  
Lithium Ion ◽  
X Ray ◽  
Charge Discharge ◽  
Scanning Electron

The High Potential Material Lini0.5Mn1.5O4 was Synthesized via Solid-State Reaction.The Surface Morphology and Particle Size of the Sample were Observed by Scanning Electron Microscope(SEM).The Crystal Structure of the Sample was Collected and Analyzed through X-Ray Diffractometry(XRD).The Sample was Charaterized by Charge-Discharge Tests.Results Indicated that the Cycling Retention Rate was about 80%,after being Charge-Diacharged at a Rate of 0.1C in a Voltage of 3.45-4.77V for 10 Times.Compared with Limn2O4,LiNi0.5Mn1.5O4 has good cycle performance.Both of LiNi0.5Mn1.5O4 structure were space group of Fd3m.

Study on the Properties of Doped La in BaBi4Ti4O15 Ceramic

2007 ◽  
Vol 26-28 ◽  
pp. 243-246
Author(s):  
Xing Hua Yang ◽  
Jin Liang Huang ◽  
Xiao Wang ◽  
Chun Wei Cui
Keyword(s):  
Crystal Structure ◽  
Grain Size ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sintering Temperature ◽  
Solid Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lanthanum Content ◽  
Scanning Electron

BaBi4-xLaxTi4O15 (BBLT) ceramics were prepared by conventional solid phase sintering ceramics processing technology. The crystal structure and the microstructure were detected by X-ray diffraction (XRD) and scanning electron microscope (SEM). The XRD analyses show that La3+ ions doping did not change the crystal structure of BBT ceramics. The sintering temperature increased from 1120°C to 1150°C with increasing Lanthanum content from 0 to 0.5, but it widened the sintering temperature range from 20°C to 50°C and refined the grain size of the BBT ceramic. Additionally, polarization treatment was performed and finally piezoelectric property was measured. As a result, the piezoelectric constant d33 of the 0.1at.% doped BBLT ceramics reached its highest value about 22pc/N at polarizing electric field of 8kV/mm and polarizing temperature of 120°C for 30min.

Lithium-Ion Battery Anode Electrochemical Properties of Si/C Composites Using Graphite and Glucose as Carbon Source

2011 ◽  
Vol 347-353 ◽  
pp. 3506-3509
Author(s):  
Xu Ma ◽  
Yu Ling Liu ◽  
Ling Long Kong ◽  
Yan Hong Ding ◽  
Jie Zhao ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Carbon Source ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Charge Capacity ◽  
X Ray ◽  
Battery Anode ◽  
Charge Discharge ◽  
Scanning Electron ◽  
Discharge Test

Si/C composites were synthesized by using graphite and glucose as carbon source. The samples were characterized by X-ray diffractometer (XRD) and field emission scanning electron microscope(SEM). The electrochemical charge/discharge test was used to evaluate capacity and cycling stability of the composites. The first discharge and charge capacity of SGC composite using graphite and glucose as carbon source were 1661mAh/g and 1259.1 mAh/g, and the first coulombic efficiency was 75.8%. After 20 cycles, the capacity of SGC composite was 380 mAh/g and the coulombic efficiency remained over 98%.

scholarly journals PENENTUAN UKURAN BUTIR KRISTAL CuCr0,98Ni0,02O2 DENGAN MENGGUNAKAN X-RAY DIFRACTION (XRD) DAN SCANNING ELECTRON MICROSCOPE (SEM)

2020 ◽  
Vol 3 (1) ◽  
pp. 6
Author(s):  
Lalu A. Didik
Keyword(s):  
Electron Microscope ◽  
Solid State ◽  
Scanning Electron Microscope ◽  
Solid State Reaction ◽  
X Ray ◽  
Scanning Electron

Telah dilakukan pengukuran ukuran butir Kristal CuCr0,98Ni0,02O2 dengan menggunakan persamaan Scherer dan analisa langsung menggunakan Scanning Electron Microscope (SEM). Kristal CuCr0,98Ni0,02O2 disintesis dengan menggunakan metode solid state reaction.  Untuk dapat mendapatkan data menggunakan persamaan Scherer, sampel harus terlebih dahulu dikarakterisasi menggunakan X-Ray Difraction (XRD). Hasil penghitungan menggunakan persamaan Scherer menunjukkan ukuran butiran Kristal sebesar (0,113 ± 0,015) µm dengan ralat relatif sebesar 13,2 %. Sedangkan pengukuran secara langsung menggunakan SEM menunjukkan ukuran butir Kristal sebesar (1,08 ± 0,23) µm dengan ralat relatif sebesar 21 %. Perbedaan hasil penghitungan dengan hasil pengukuran menggunakan SEM disebabkan karena morfologi lapisan. Morfologi kristal yang dihasilkan oleh scanning berkas elektron sekunder pada SEM memungkinkan untuk mendapatkan perbesaran gambar yang cukup sehingga dapat dilakukan pengukuran secara langsung. Sedangkan penghitungan ukuran butir Kristal CuCr0,98Ni0,02O2 menggunakan  persamaan Scherer berdasarkan prinsip difraksi sinar X dengan jarak antar celahnya adalah jarak antar atom pada Kristal sehingga untuk mendapatkan data ukuran butir Kristal menggunakan persamaan Scherer sampel harus terlebih dahulu dikarakterisasi menggunakan XRD. Selain itu, karena dilakukan secara langsung pengukuran hasil karakterisasi menggunakan SEM bukan mengukur ukuran butir Kristal melainkan ukuran partikel.   

Preparation and Characterisation of Amorphous Silica from Alkali Wastewater Produced in Manufacturing Process of ZrOCl2

2011 ◽  
Vol 194-196 ◽  
pp. 2164-2168 ◽  
Author(s):  
Bai Kun Wang ◽  
Hao Ding ◽  
Yun Xing Zheng ◽  
Ning Liang
Keyword(s):  
Particle Size ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Amorphous Silica ◽  
Manufacturing Process ◽  
Zirconium Oxychloride ◽  
Silica Content ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

The amorphous silica was prepared from the alkali wastewater rich in Na2O•nSiO2 produced in manufacturing process of zirconium oxychloride (ZrOCl2). The composition and microstructure of amorphous silica were studied by X-ray diffraction, X-ray fluorescence and scanning electron microscope, respectively. The results showed that the amorphous silica was mainly composed of uncrystallized substance, and the silica content was 96.4%. Its whiteness was 97.5% and the particle size was between 100nm and 200nm without agglomeration. The specific surface area of the amorphous silica was 531.9 m2/g, and its pore volume and diameter were 0.945 cm3/g and 4.94 nm, respectively.

scholarly journals Preparation and Characterization of White Carbon Black From Rice Husk

2017 ◽  
Vol 9 (2) ◽  
pp. 1-7 ◽  
Author(s):  
MAA Khan ◽  
MS Saha ◽  
S Sultana ◽  
AN Ahmed
Keyword(s):  
Particle Size ◽  
Electron Microscope ◽  
Carbon Black ◽  
Scanning Electron Microscope ◽  
Rice Husk ◽  
Chemical Properties ◽  
Acid Leaching ◽  
Amorphous Structure ◽  
X Ray ◽  
Scanning Electron

Generally white carbon black in a form of silica is used instead of carbon black as reinforcing filler for rubber compounding. In the present research white carbon black was prepared from rice husks in cost effective method with direct incineration of acid leaching rice husk. The physico-chemical properties of rice husk and the product of white carbon black obtained from rice husk were investigated by Thermogravimetry, Particle size analyzer, Scanning electron microscope; Fourier transformed infrared radiation (FTIR), X-ray fluorescence and X-ray difractometry analyses. It was found that the decomposition of organic constituents of rice husk was revealed by Thermo gravimetric and carbon, hydrogen, nitrogen, sulpher (CHNS) analyses. The FTIR spectrum showed presence of Si-O-Si band with a strong peak at 1085 cm-1. The analysis of particle size and scanning electron microscope demonstrated that the produced white carbon black represent different size of 112 ?m to 0.01 ?m with very small nano-particle and amorphous structure. The amorphous structure of product was also confirmed by XRD pattern. The high pure product as 99.9% was confirmed by XRF analysis. These types of product have potential application as filler in rubber compounding.J. Environ. Sci. & Natural Resources, 9(2): 1-7 2016

Microstructures of Zirconium Titanate Powders and Ceramics Prepared by Solid-State Mixed Oxide Method

2008 ◽  
Vol 55-57 ◽  
pp. 145-148
Author(s):  
C. Puchmark ◽  
P. Tipparak
Keyword(s):  
Electron Microscope ◽  
Solid State ◽  
Scanning Electron Microscope ◽  
Heating Rate ◽  
Sintering Temperature ◽  
Zirconium Titanate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Jcpds File ◽  
Scanning Electron

Zirconium titanate (ZrTiO4): ZT powders were prepared by solid-state mixed oxide method. The mixed powder was calcined at various temperatures for 3 h ranging from 1100 to 1400 oC with a heating rate of 5 oC/min. X-ray diffraction analysis of the powders was performed using a diffractometer with Cu Ka. Pyrochlore phase was observed for calcinations below 1300 oC. In general, the strongest reflections apparent in patterns could be matched with a JCPDS file number 74-1504. The optimum calcination temperature for the formation of ZrTiO4 phase was found to be about 1300 oC for 3 h with heating rate of 5 oC/min. The microstructures of calcined powders were examined using scanning electron microscope (SEM). The particle size of powder increased with increasing calcination temperature. The ZT ceramics sintered at 1450, 1500, 1550 and 1600 oC for 4 h with heating rate of 5 oC/min, were checked for phase formation by X-ray diffraction. The density of sintered samples was measured by Archimedes method. The microstructures of sintered samples were examined using scanning electron microscope (SEM). The average grain sizes were checked by linear interception method. It was found that, the samples sintered at 1450 and 1500 oC gave rise to high purity ZT ceramics and the peaks matched well with ZrTiO4 phase in a JCPDS file number 74-1504. Unknown phases were found in ZT ceramics sintered at 1550 and 1600 oC. The value of density was in the range of 4.32 - 4.92 g/cm3 or 84.26 - 96.12 % of the ZT theoretical density. The densification of ZT ceramics decreased with increasing sintering temperature. The ZT ceramics sintered at 1450 and 1500 oC showed the average grain size of 8.55 and 12.55 µm, respectively. At sintering temperature 1550 and 1600 oC, morphology of grains changed to plate like crystals of second phases.

Crystal and surface structures of Y2O3 nanoparticles at room temperature

2021 ◽  
pp. 2150371
Author(s):  
R. F. Rzayev
Keyword(s):  
Crystal Structure ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Room Temperature ◽  
Diffraction Method ◽  
Surface Structures ◽  
X Ray Diffraction ◽  
Cubic Symmetry ◽  
X Ray ◽  
Scanning Electron

In this work, the crystal and surface structures of Y2O3 nanoparticles were explored. The exploration of crystal structure was carried out by X-ray diffraction method at room temperature and under normal conditions. It was found that the crystal structure of the Y2O3 compound has a cubic symmetry with an Ia-3 space group. The lattice parameters have the values: [Formula: see text] Å. The surface structure was studied at room temperature and under normal conditions on Scanning Electron Microscope (SEM) microscope. It was found that the nanoparticles of the Y2O3 compound being in the range 20–40 nm are of [Formula: see text] nm size.

Study on Preparation of LiNi0.5Co0.2Mn0.3O2 Precursor-Spherical Ni0.5Co0.2Mn0.3O2(OH)2

2015 ◽  
Vol 816 ◽  
pp. 676-681 ◽  
Author(s):  
Xiao Long Qu ◽  
Zheng Fu Zhang ◽  
Jin Cheng ◽  
Xiao Yan Wang
Keyword(s):  
Particle Size ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tap Density ◽  
Homogeneous Particle ◽  
Co Precipitation ◽  
Scanning Electron

The spherical Ni0.5Co0.2Mn0.3(OH)2 powders were prepared by ammonia-hydroxide co-precipitation method. The influence of different synthesizing factors on the precursors characteristic were investigated. The product prepared with optimized condition has tap density of D≥1.7g·cm-3, and middle particle size D50≈3.6μm. The X-ray diffraction (XRD) results showed that the precursor can be indexed by a hexagonal β-Ni (OH)2 structure. The scanning electron microscope (SEM) results showed that the powders had quasi-spherical pattern and homogeneous particle size distribution.

Study on the Phase Composition and Particle Size of Boron Mud

2014 ◽  
Vol 881-883 ◽  
pp. 1568-1571
Author(s):  
Zhi Qiang Ning ◽  
Ling Ling Zhang
Keyword(s):  
Particle Size ◽  
Phase Composition ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
X Ray ◽  
Laser Particle Size Analyzer ◽  
Particle Size Analyzer ◽  
Boron Mud ◽  
Scanning Electron

The phase composition and particle size of the boron mud is investigated by X-ray diffractometry (XRD), scanning electron microscope (SEM) and laser particle size analyzer. The mainly phase composition of the boron mud are magnesite (MgCO3) and forsterite (Mg2SiO4). The mainly phase composition of the calcined boron mud are forsterite (Mg2SiO4) and a small amount magnesia (MgO). the sizes of the boron mud are about 2~6μm and a few of them are bigger and less than 10μm and the particle size of less than 10μm is about 60%.

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