scholarly journals The Effect of Temperature Variation on Conductivity Value of Cathode Lithium Ferro Phosphate Carbon Composite

2018 ◽  
Vol 8 (2) ◽  
pp. 84
Author(s):  
Metatia Intan Mauliana ◽  
Mochamad Zainuri
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Calcination Temperature ◽  
Solid State Reaction ◽  
Phase Structure ◽  
Base Material ◽  
Solid State Reaction Method ◽  
High Energy ◽  
Carbon Composite ◽  
Reaction Method

The lithium ferrous phosphate carbon composite (LFP/C) cathode material has been successfully synthesized using solid-state reaction method by utilizing one of the natural sources of iron rocks in Tanah Laut, Kalimantan, as the base material of Fe. Solid-state reaction method was done by using high energy ball milling tool. The LFP cathode material was prepared using a base material (Li2CO3), Fe3O4, and (NH4)2HPO4 in a ratio of 3:6:2 and 5% wt. of Citric acid as a carbon source. There were some variations of calcination temperature used under inert conditions at 400 °C, 500 °C, 600 °C, and 700 °C to determine the effect on the phase structure and electrical conductivity produced by LFP/C cathode composites. Characterization of phase structure was done by using X-ray powder diffraction (XRD), while the conductivity value of the sample was tested using Electrochemical Impedance Spectroscopy (EIS). The analysis of the diffraction pattern shows the largest composition of olivine structure formed at 700 °C at 93.3% wt. with Fe2O3 impurities of 6.7% wt. The highest conductivity value of LFP/C is shown by sampling with 500 °C calcination temperature with a total conductivity value of 5,676 x 10-3 S.cm-1.

Synthesis, structural and electrochemical study of O3–NaNi0.4Mn0.4Co0.2O2 as a cathode material for Na-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (66) ◽  
pp. 61334-61340 ◽  
Author(s):  
M. Satyanarayana ◽  
A. K. Jibin ◽  
U. V. Varadaraju
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Electrochemical Study ◽  
Optimum Temperature ◽  
Reaction Method

Hexagonal layered O3–NaNi0.4Mn0.4Co0.2O2 is prepared by a mixed hydroxide solid state reaction method at an optimum temperature of 800 °C.

Effect of the Doping Ni and Overdosing Lithium for Synthesis LiMn2O4 Cathode Material by the Solid State Reaction Method

2013 ◽  
Vol 457-458 ◽  
pp. 93-97
Author(s):  
Yen Chun Liu ◽  
Ming Cheng Liu ◽  
Robert Lian Huey Liu ◽  
Mao Chieh Chi
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Cathode Materials ◽  
Solid State Reaction ◽  
Lithium Battery ◽  
Sintering Temperature ◽  
Solid State Reaction Method ◽  
Attrition Rates ◽  
Reaction Method ◽  
Initial Capacity

The study with Li2CO3 and Mn3O4 through the solid state reaction makes cathode material for lithium battery spinel - LiMn2O4. According to past literature, under the solid-state reaction. The experiment carries out sintering at temperature of 850°C.. Cathode materials under these sintering temperatures are made to fabricate battery. For Ni doped LiMn2O4, the capacitance decreasing speed is slow and stable; after 15 times charging-discharging cycles, the attrition rates were 3.05 % or less. The result of experiment demonstrates that the best sintering temperature is at 850°C. Under the condition of 850°C, various contents for extra amount of lithium (1.02 mole-1.1 mole) are fabricated and range of working voltage is released. It is found a further increase of initial capacity to 140.51 mAh/g. LiMn2O4 further extends circulation and usage.

Preparation and Identification of Barium Monoferrite by Solid State Reaction Method

2019 ◽  
Vol 34 ◽  
pp. 46-52
Author(s):  
Iulian Ştefan ◽  
Gabriel Benga ◽  
Ionel Dănuț Savu ◽  
Sorin Vasile Savu ◽  
Adrian Olei
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Mechanical Alloying ◽  
Solid State Reaction ◽  
Barium Carbonate ◽  
Solid State Reaction Method ◽  
High Energy ◽  
Phase Identification ◽  
Formation Temperature ◽  
Reaction Method

In this paper, BaFe2O4 was prepared from BaCO3 and Fe2O3 powders through the solid state reaction method. This method starts by mixing the barium carbonate and iron oxide in order to homogenize the raw materials and takes place in a wet medium. For a better homogenization of BaCO3 and Fe2O3 powders and in order to reduce the monoferrite formation temperature, it was used the mechanical alloying process for 3 and 9 hours in a high energy ball mill. Particle size distributions of the milled powders were analyzed by a BROOKHAVEN 90PLUS device. To understand the phase formation temperature, thermogravimetry analysis was carried out. The phase identification of the calcined powder was carried out by D8 Discover Bruker X-ray diffractometer. The results showed that once with the reduction of powders particle size, in the mechanical alloying process, the temperature of the solid state reaction of barium monoferrite was also reduced.

scholarly journals EFFECT OF Ca CONCENTRATION SUBSTITUTING FOR Ba ON STRUCTURE AND FERROELECTRIC PROPERTIES OF BZT-BCT MATERIAL

2018 ◽  
Vol 56 (1A) ◽  
pp. 86
Author(s):  
Nguyen Van Khien
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Phase Structure ◽  
Ferroelectric Properties ◽  
Hysteresis Loops ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
X Ray ◽  
Pinning Effect ◽  
Ca Substitution

In this paper, we report the effect of Ca substitution on the structure and ferroelectric properties of BaZr0.2Ti0.8O3-Ba1-xCaxTiO3 (BZT-BCT). The BZT-BCT samples were synthesized by solid state reaction method. The X-ray results indicate that a phase structure competition appears in the Ca-substituted samples. Based on the hysteresis loops measured by Sawyer – Towermethod, we calculated the Ec and Pr values with the extreme value reaching 29.6 %. The ferroelectric properties of BZT-BCT materialstrongly depend on Ca concentration. The results may be related to a pinning effect concerning with the phase-structured competition in the material.

Composition-driven phase boundary and electrical properties in (Ba0.94Ca0.06)(Ti1–xMx)O3 (M = Sn, Hf, Zr) lead-free ceramics

2016 ◽  
Vol 45 (15) ◽  
pp. 6466-6480 ◽  
Author(s):  
Chunlin Zhao ◽  
Hui Wang ◽  
Jie Xiong ◽  
Jiagang Wu
Keyword(s):  
Solid State ◽  
Electrical Properties ◽  
Solid State Reaction ◽  
Phase Structure ◽  
Composition Dependence ◽  
Solid State Reaction Method ◽  
Lead Free ◽  
Conventional Solid State Reaction ◽  
Reaction Method ◽  
Lead Free Ceramics

In this study, we systematically investigated the composition dependence of the phase structure, microstructure, and electrical properties of (Ba0.94Ca0.06)(Ti1−xMx)O3 (M = Sn, Hf, Zr) ceramics synthesised by the conventional solid-state reaction method.

MICROWAVE ABSORPTION STUDY OF MANGANESE FERRITE IN X-BAND RANGE PREPARED BY SOLID STATE REACTION METHOD

2018 ◽  
Vol 80 (2) ◽  
Author(s):  
Mashadi Mashadi ◽  
Yunasfi Yunasfi ◽  
Ade Mulyawan
Keyword(s):  
Solid State ◽  
Microwave Absorption ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
High Energy ◽  
Molar Ratio ◽  
Phase Identification ◽  
Manganese Ferrite ◽  
Reaction Method ◽  
X Band

A research to study the microwave absorption properties of manganese ferrite in the X-band range have been conducted by using high energy milling technique. The synthesis of manganese ferrite (Mn1+xFe2-xO4) was performed using solid state reaction method with the material composition (x)MnO : (2-x) Fe2O3 (x = 0.25; 0.50; 0.75 and 1.0) according to the molar ratio. This powder mixture was being milled for 10 hours then sintered at 1200 °C temperature for 3 hours. Material characterization was done by using FTIR spectroscopy (Fourier Transform Infra Red Spectroscopy) to observe the functional group, XRD (X-ray diffractometer) for phase identification, SEM (Scanning Electron Microscope) for surface morphology observation and VNA (Vector Network Analyzer) to determine the ability of materials to absorb microwaves. Analysis by FTIR showed two absorption peaks in the range of ~ 446 and ~ 557 cm-1 were associated with the octahedral and tetrahedral sites in structure of MnFe2O4. Phase identification by XRD showed that the increasing content of Mn (above x=0.25 composition) caused a single phase of MnFe2O4 turned into two phases (MnFe2O4 and Fe2O3), this results correspond to the SEM results which showed the morphological structure of those compositions are inhomogenous. The Absorption of microwaves was also decreased along with the increasing of Mn content. The maximum refflection loss was reached in the composition of Mn (x=0.0) which equal to ~ 82%, while for the composition of Mn (x=0.0) only reached ~ 55%.

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