Influence of Heating Temperature on Structure, Morphology and Electrochemical Performance of LiV3O8 Cathode for Lithium-Ion Batteries Application

2020 ◽  
Vol 1010 ◽  
pp. 314-320
Author(s):  
Mohamad Izha Ishak ◽  
Khairel Rafezi Ahmad ◽  
Rozana A.M. Osman ◽  
Mohd Sobri Idris
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Layered Structure ◽  
Heating Temperature ◽  
Lithium Ion ◽  
Galvanostatic Charge ◽  
Heat Treated ◽  
Structure Morphology ◽  
Performance Results ◽  
Charge Discharge

LiV3O8 layered structure was successfully synthesized by a conventional solid-state approach and subsequent heat-treated at 400, 450, 500 and 550 oC. The samples were characterized by XRD, SEM, TEM, BET. Electrochemical performance of LiV3O8 was investigated by cyclic voltammetry (CV) and galvanostatic charge-discharge. The results showed that high purity of LiV3O8 with layered structure was formed. The morphology of the samples were mixed between nanorods and nanosheets structure. For electrochemical performance, results showed that LiV3O8 heat-treated at 500 oC performed a highest charge and discharge capacity of 212 and 172 mAh g-1, respectively. From electrochemical performance results made them a good candidate for cathode material for lithium-ion batteries application.

scholarly journals The Use of Succinonitrile as an Electrolyte Additive for Composite-Fiber Membranes in Lithium-Ion Batteries

Membranes ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 45 ◽  
Author(s):  
Jahaziel Villarreal ◽  
Roberto Orrostieta Chavez ◽  
Sujay A. Chopade ◽  
Timothy P. Lodge ◽  
Mataz Alcoutlabi
Keyword(s):  
Ionic Liquid ◽  
Ionic Conductivity ◽  
Lithium Ion Batteries ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Composite Fiber ◽  
Galvanostatic Charge ◽  
Lithium Anode ◽  
Charge Discharge ◽  
Licoo2 Cathode

In the present work, the effect of temperature and additives on the ionic conductivity of mixed organic/ionic liquid electrolytes (MOILEs) was investigated by conducting galvanostatic charge/discharge and ionic conductivity experiments. The mixed electrolyte is based on the ionic liquid (IL) (EMI/TFSI/LiTFSI) and organic solvents EC/DMC (1:1 v/v). The effect of electrolyte type on the electrochemical performance of a LiCoO2 cathode and a SnO2/C composite anode in lithium anode (or cathode) half-cells was also investigated. The results demonstrated that the addition of 5 wt.% succinonitrile (SN) resulted in enhanced ionic conductivity of a 60% EMI-TFSI 40% EC/DMC MOILE from ~14 mS·cm−1 to ~26 mS·cm−1 at room temperature. Additionally, at a temperature of 100 °C, an increase in ionic conductivity from ~38 to ~69 mS·cm−1 was observed for the MOILE with 5 wt% SN. The improvement in the ionic conductivity is attributed to the high polarity of SN and its ability to dissolve various types of salts such as LiTFSI. The galvanostatic charge/discharge results showed that the LiCoO2 cathode with the MOILE (without SN) exhibited a 39% specific capacity loss at the 50th cycle while the LiCoO2 cathode in the MOILE with 5 wt.% SN showed a decrease in specific capacity of only 14%. The addition of 5 wt.% SN to the MOILE with a SnO2/C composite-fiber anode resulted in improved cycling performance and rate capability of the SnO2/C composite-membrane anode in lithium anode half-cells. Based on the results reported in this work, a new avenue and promising outcome for the future use of MOILEs with SN in lithium-ion batteries (LIBs) can be opened.

Summarize the Studies on Improving the Electrochemical Performance of Spinel LiMn2O4

2013 ◽  
Vol 690-693 ◽  
pp. 971-976 ◽  
Author(s):  
Fu Li Wang ◽  
Hong Dan Xue ◽  
Ke Wang ◽  
Pu Liu ◽  
Yong Qing Bai
Keyword(s):  
High Temperature ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Research Progress ◽  
Research Trend ◽  
Cycle Stability ◽  
Spinel Limn2o4 ◽  
Nanometer Particles ◽  
Charge Discharge

Many studies show spinel LiMn2O4 is one of the most promising cathode materials for lithium ion batteries. At present, urgent need is that capacity attenuation in the process of charge / discharge and cycle stability at high temperature are developed. The methods can be classified into bulk doped, surface coated and nanometer particles. Research progress about improving the electrochemical performance of spinel LiMn2O4 is summarized and further research trend is pointed out in this paper.

High rate capabilities of Li4Ti5−xVxO12 (0 ≤ x ≤ 0.3) anode materials prepared by a sol–gel method for use in power lithium ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (61) ◽  
pp. 49248-49256 ◽  
Author(s):  
Chien-Min Chang ◽  
Yi-Chih Chen ◽  
Wei-Lun Ma ◽  
Yui Whei Chen-Yang
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Sol Gel ◽  
Lithium Ion ◽  
High Rate ◽  
Gel Method ◽  
Sol Gel Method ◽  
Performance Results

The electrochemical performance results show that the highest capacities, 208 (0.2 C), 198 (0.5 C), 189 (1 C), 179 (2 C), 157 mA h g−1 (5 C), are obtained from the LTOV06 electrode, which are higher than those of the LTO electrodes reported.

Site-dependent electrochemical performance of Na and K co-doped LiFePO4/C cathode material for lithium-ion batteries

2017 ◽  
Vol 41 (20) ◽  
pp. 12190-12197 ◽  
Author(s):  
Ali Reza Madram ◽  
Mahbubeh Faraji
Keyword(s):  
Solid State ◽  
Electrochemical Performance ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Solid State Synthesis ◽  
Occupied Site ◽  
Structure Morphology ◽  
Co Doped

In this study, Na and K co-doped LiFePO4/C samples with controlled Na and K sites, i.e., the Li1−x−yNaxKyFePO4/C and LiFe1−x−yNaxKyPO4/C (x = 0.02, y = 0.01) have been first synthesized via a common solid-state synthesis and the effects of the alien metal occupied site on the structure, morphology and electrochemical performance of LiFePO4/C are studied.

Sulfate Ion Influence of LiNi1/3Co1/3Mn1/3O2 as Cathode Material for Lithium-Ion Batteries

2015 ◽  
Vol 1119 ◽  
pp. 560-563
Author(s):  
Jian Feng Dai ◽  
Ji Fei Liu ◽  
Bi Fu
Keyword(s):  
Electrochemical Performance ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Significant Influence ◽  
Lithium Ion ◽  
Complex Salt ◽  
Cycle Performance ◽  
Sulfate Ion ◽  
Sulfate Ions ◽  
Charge Discharge

The residue sulfate ions (SO42-) occurs in an adsorption and complex salt manner which are significant influence the electrochemical properties of LiNi1/3Co1/3Mn1/3O2 as cathodes materials for lithium-ion batteries. Compare with different SO42- concentration electrochemical performance reveals that low SO42- concentration (0.28%) demonstrated a better charge/discharge cycle performance than the high SO42- concentration (0.48%) of LiNi1/3Co1/3Mn1/3O2, it maintains a capacity of 148.9 mAh·g−1 with a coulomb efficient of 91 % after 100 cycles which superior to the SO42- concentration (0.48%) circulation coulomb efficient of 87%, respectively.

Preparation and characterization of layered LiNi0.9Co0.05Mn0.025Mg0.025O2 cathode material by a sol–gel method for lithium-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (51) ◽  
pp. 40779-40784 ◽  
Author(s):  
Daochuan Jiang ◽  
Li Zhao ◽  
Yanbin Shao ◽  
Dianlong Wang
Keyword(s):  
Citric Acid ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Layered Structure ◽  
Sol Gel ◽  
Lithium Ion ◽  
Gel Method ◽  
Sol Gel Method ◽  
Excellent Electrochemical Performance

LiNi0.9Co0.05Mn0.025Mg0.025O2 prepared by sol–gel method using citric acid had a well ordered hexagonal layered structure and showed excellent electrochemical performance.

scholarly journals Comparison of the so-called CGR and NCR cathodes in commercial lithium-ion batteries using in situ neutron powder diffraction

2014 ◽  
Vol 29 (S1) ◽  
pp. S35-S39 ◽  
Author(s):  
Moshiul Alam ◽  
Tracey Hanley ◽  
Wei Kong Pang ◽  
Vanessa K. Peterson ◽  
Neeraj Sharma
Keyword(s):  
Lithium Ion Batteries ◽  
Powder Diffraction ◽  
Layered Structure ◽  
Lithium Ion ◽  
Neutron Powder Diffraction ◽  
Charged State ◽  
Charge Discharge

The evolution of the 003 reflection of the layered Li(Ni,Co,Mn)O2 (CGR) and Li(Ni,Co,Al)O2 (NCR) cathodes in commercial 18650 lithium-ion batteries during charge/discharge were determined using in situ neutron powder diffraction. The 003 reflection is chosen as it is the stacking axis of the layered structure and shows the largest change during charge/discharge. The comparison between these two cathodes shows that the NCR cathode exhibits an unusual contraction near the charged state and during the potentiostatic step, where the potentiostatic step is recommended by the manufacturer. This feature is not shown to the same degree by the CGR cathode. The behavior is likely related to the compositions of these cathodes, the amount of Li/Ni site mixing and the presence of Al or Mn.

Preparation and Study on Si/Ag/C Composite as Anode Material for Lithium Ion Batteries

2013 ◽  
Vol 834-836 ◽  
pp. 281-284
Author(s):  
Tao Cui ◽  
Yao Wu Wang ◽  
Xu Yao Hu ◽  
Yu Ming Shang ◽  
Xiang Ming He ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Test Results ◽  
Electrochemical Test ◽  
Sem Images ◽  
Charge Discharge ◽  
Discharge Test

Si/Ag/C composite was prepared by two-step reaction. The phase and surface morphology of samples was studied by XRD and SEM. The electrochemical performance of the composite was investigated by charge/discharge test. SEM images indicate that the particles dispersed uniform and structure of the materials is stable. Electrochemical test results show that the initial discharged and charge capacities of Si/Ag/C composite are 2016.9 mAh/g and 1275.0 mAh/g, respectively. A reversible capacity of Si/Ag/C composite after 50 cycles is 325.5 mAh/g retained.

Electrospun SnO2-Graphene Composite Nanofibers as High Performance Anode for Lithium Ion Batteries

2015 ◽  
Vol 645-646 ◽  
pp. 1207-1213
Author(s):  
Yu Ling Wu ◽  
Jie Lin ◽  
Jian Yan Wang ◽  
Hang Guo
Keyword(s):  
Lithium Ion Batteries ◽  
Composite Nanofibers ◽  
Lithium Ion ◽  
Morphological Properties ◽  
Phase Reaction ◽  
Galvanostatic Charge ◽  
Two Phase ◽  
Electrospinning Technique ◽  
Graphene Composite ◽  
Charge Discharge

A promising anode material for lithium ion batteries is reported in this paper. It is one-dimensional SnO2−graphene composite nanofibers (SnO2−G nanofibers) fabricated by using electrospinning technique. In the study, X-ray diffraction (XRD) and scanning electron microscopy (SEM) are used to characterize its structural and morphological properties. Samples with different ratio of SnO2 to graphene (wt%) are prepared to investigate its electrochemical performance. Galvanostatic charge/discharge tests reveals that Li-insertion/extraction is carried out through a two-phase reaction mechanism that is supported by galvanostatic charge−discharge profiles. It is found that the optimal proportion of SnO2 to graphene is 8:1 (wt%) for the electrospun composite materials. Furthermore, micro thin film batteries have been fabricated and tested. The results show that initial discharge capacity is 301.86 mA h g−1 at current density of 50 μA g−1, and battery can retain 63.3% of reversible capacity after 300 cycles, which is 5 times higher than bare SnO2.

Hydrothermal Synthesis and Electrochemical Performance of LiFePO4/Graphene Composites for Lithium-Ion Batteries

2014 ◽  
Vol 900 ◽  
pp. 242-246 ◽  
Author(s):  
Xing Ling Lei ◽  
Hai Yan Zhang ◽  
Yi Ming Chen ◽  
Wen Guang Wang ◽  
Zi Dong Huang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Lithium Ion Batteries ◽  
Electrochemical Impedance ◽  
Lithium Ion ◽  
X Ray Diffraction ◽  
Galvanostatic Charge ◽  
X Ray ◽  
Charge Discharge ◽  
Scanning Electron ◽  
Discharge Test

LiFePO4/graphene composites were prepared via a simple hydrothermal method. The as-prepared LiFePO4/graphene composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), galvanostatic charge-discharge test, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) tests. The lithium-ion batteries using LiFePO4/graphene composites as cathode material exhibited a discharge capacity of 165 mAh/g, which was 97% of the theoretical capacity of 170 mAh/g.

Sign in / Sign up

Export Citation Format

Share Document