Elevated Electrochemical Performance of LiNi0.1Mg0.1Co0.8O2 and LiFePO4 Cathodes with Tris(2,2,2-trifluoroethyl) Phosphite as an Efficient Electrolyte Additive

2021 ◽  
Vol 21 (12) ◽  
pp. 6227-6233
Author(s):  
S. Arockia Shyamala Paniyarasi ◽  
S. Padmaja ◽  
M. Pushpa Selvi ◽  
R. M. Gnanamuthu ◽  
R. Nimma Elizabeth
Keyword(s):  
Cathode Materials ◽  
Room Temperature ◽  
Electrochemical Impedance ◽  
Electronic Conductivity ◽  
Irreversible Capacity ◽  
Electrolyte Additive ◽  
Lithium Diffusion ◽  
Nyquist Plots ◽  
Li Ion

The significant role of Tris(2,2,2-trifluoroethyl) phosphite (TTFP) as an efficient additive during cycling of the layered nanostructured LiNi0.1Mg0.1Co0.8O2 and olivine LiFePO4 cathode materials in EC/DMC and 1M LiPF6 electrolyte for Li-ion battery are extensively investigated in this work. The electrochemical characterization techniques such as cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy show that TTFP improves cycling stability and reduces the irreversible capacity of LiNi0.1Mg0.1Co0.8O2 and LiFePO4 electrodes. Also, the presence of TTFP in electrolyte solution reduces the impedance in LiNi0.1Mg0.1Co0.8O2 and LiFePO4 cathode materials at room temperature. A family of Nyquist plots was obtained from LiNi0.1Mg0.1Co0.8O2 and LiFePO4 electrodes for various potentials during the course of charging. The addition of TTFP in the electrolyte reduces the surface impedance of lithiated LiNi0.1Mg0.1Co0.8O2 and LiFePO4 which can be attributed to the reaction of the additive on the electrode’s surface. Also, the presence of the additive TTFP in LiNi0.1Mg0.1Co0.8O2 and LiFePO4 cell enhances the lithium diffusion rate and improves the electronic conductivity of the cathode material.

Reassessment of the role of Ag as the dopant in Li-ion cathode materials

2012 ◽  
Vol 681 ◽  
pp. 84-88 ◽  
Author(s):  
Y.H. Xu ◽  
J. Wu ◽  
H. Ju
Keyword(s):  
Cathode Materials ◽  
Li Ion

FUNCTIONAL CATHODE MATERIALS FOR Li-ION BATTERIES — PART II: LiFePO4 AND ITS COMPOSITE

2008 ◽  
Vol 01 (02) ◽  
pp. 97-104 ◽  
Author(s):  
JANINA MOLENDA ◽  
JACEK MARZEC
Keyword(s):  
Electrochemical Properties ◽  
High Temperatures ◽  
Cathode Materials ◽  
Preparation Method ◽  
Electronic Conductivity ◽  
Li Ion Batteries ◽  
Type Conductivity ◽  
High Electronic Conductivity ◽  
Li Ion

The paper presents a review of the structural, electrical and electrochemical properties of LiFePO 4 pospho-olivine dopped with W , Ti , Al and manganese substituted LiFe 1-y Mn y PO 4, synthesized at high temperatures as well as preparation method of LiFePO 4– Fe 2 P composite phases. The nature of the metallic type conductivity of doped phospho-olivine is discussed and some fundamental arguments against the bulk nature of the observed high electronic conductivity are presented.

The role of nanoscale-range vanadium treatment in LiNi0.8Co0.15Al0.05O2 cathode materials for Li-ion batteries at elevated temperatures

2015 ◽  
Vol 3 (25) ◽  
pp. 13453-13460 ◽  
Author(s):  
Min-Joon Lee ◽  
Mijung Noh ◽  
Mi-Hee Park ◽  
Minki Jo ◽  
Hyejung Kim ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Elevated Temperatures ◽  
Li Ion Batteries ◽  
Nano Scale ◽  
Structural Robustness ◽  
Test Conditions ◽  
Li Ion ◽  
Nanoscale Range ◽  
Scale Surface

A nano-scale surface protecting layer of LiNi0.8Co0.15Al0.05O2 consisting of substituted V4+ ions in 3b sites leads to structural robustness under the most challenging test conditions.

Role of Ni, Mn and Co in Layered Rock Salt Cathode Materials for Li-Ion Battery: A DFT Study

2020 ◽  
Vol MA2020-02 (1) ◽  
pp. 61-61
Author(s):  
Yoshiya Fujiwara ◽  
Yoshiyuki Morita ◽  
Hiroshi Ogasa ◽  
Fumika Fujisaki ◽  
Akihiro Kushima
Keyword(s):  
Rock Salt ◽  
Cathode Materials ◽  
Dft Study ◽  
Li Ion Battery ◽  
Layered Rock ◽  
Li Ion

scholarly journals Graphene and Lithium-Based Battery Electrodes: A Review of Recent Literature

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4867 ◽  
Author(s):  
Luca Lavagna ◽  
Giuseppina Meligrana ◽  
Claudio Gerbaldi ◽  
Alberto Tagliaferro ◽  
Mattia Bartoli
Keyword(s):  
Performance Enhancement ◽  
Electronic Conductivity ◽  
Mass Scale ◽  
Science Field ◽  
Practical Applications ◽  
Research Areas ◽  
Materials Research ◽  
Li Ion ◽  
New Generation

Graphene is a new generation material, which finds potential and practical applications in a vast range of research areas. It has unrivalled characteristics, chiefly in terms of electronic conductivity, mechanical robustness and large surface area, which allow the attainment of outstanding performances in the material science field. Some unneglectable issues, such as the high cost of production at high quality and corresponding scarce availability in large amounts necessary for mass scale distribution, slow down graphene widespread utilization; however, in the last decade both basic academic and applied industrial materials research have achieved remarkable breakthroughs thanks to the implementation of graphene and related 1D derivatives. In this work, after briefly recalling the main characteristics of graphene, we present an extensive overview of the most recent advances in the development of the Li-ion battery anodes granted by the use of neat and engineered graphene and related 1D materials. Being far from totally exhaustive, due to the immense scientific production in the field yearly, we chiefly focus here on the role of graphene in materials modification for performance enhancement in both half and full lithium-based cells and give some insights on related promising perspectives.

scholarly journals Polyethylene Oxide as a Multifunctional Binder for High-Performance Ternary Layered Cathodes

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3992
Author(s):  
Jinshan Mo ◽  
Dongmei Zhang ◽  
Mingzhe Sun ◽  
Lehao Liu ◽  
Weihao Hu ◽  
...  
Keyword(s):  
Polyethylene Oxide ◽  
Cathode Materials ◽  
High Performance ◽  
Electrochemical Impedance ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Rate Performance ◽  
High Electronic Conductivity

Nickel cobalt manganese ternary cathode materials are some of the most promising cathode materials in lithium-ion batteries, due to their high specific capacity, low cost, etc. However, they do have a few disadvantages, such as an unstable cycle performance and a poor rate performance. In this work, polyethylene oxide (PEO) with high ionic conductance and flexibility was utilized as a multifunctional binder to improve the electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode materials. Scanning electron microscopy showed that the addition of PEO can greatly improve the adhesion of the electrode components and simultaneously enhance the integrity of the electrode. Thus, the PEO-based electrode (20 wt% PEO in PEO/PVDF) shows a high electronic conductivity of 19.8 S/cm, which is around 15,000 times that of the pristine PVDF-based electrode. Moreover, the PEO-based electrode exhibits better cycling stability and rate performance, i.e., the capacity increases from 131.1 mAh/g to 147.3 mAh/g at 2 C with 20 wt% PEO addition. Electrochemical impedance measurements further indicate that the addition of the PEO binder can reduce the electrode resistance and protect the LiNi0.6Co0.2Mn0.2O2 cathode materials from the liquid electrolyte attack. This work offers a simple yet effective method to improve the cycling performance of the ternary cathode materials by adding an appropriate amount of PEO as a binder in the electrode fabrication process.

scholarly journals Role of impurity copper in Li-ion battery recycling to LiCoO2 cathode materials

2020 ◽  
Vol 450 ◽  
pp. 227630 ◽  
Author(s):  
Chao Peng ◽  
Katja Lahtinen ◽  
Elena Medina ◽  
Pertti Kauranen ◽  
Maarit Karppinen ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Li Ion Battery ◽  
Battery Recycling ◽  
Li Ion ◽  
Licoo2 Cathode

Ab initio study of doping effects on LiMnO2 and Li2MnO3 cathode materials for Li-ion batteries

2015 ◽  
Vol 3 (16) ◽  
pp. 8489-8500 ◽  
Author(s):  
Fantai Kong ◽  
Roberto C. Longo ◽  
Min-Sik Park ◽  
Jaegu Yoon ◽  
Dong-Hee Yeon ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Phase Stability ◽  
Cathode Materials ◽  
Density Functional ◽  
Electronic Conductivity ◽  
Li Ion Batteries ◽  
Ab Initio Study ◽  
Functional Theory ◽  
Doping Effects ◽  
Li Ion

The influence of 10 cationic (Mg, Ti, V, Nb, Fe, Ru, Co, Ni, Cu and Al) and 2 anionic (N and F) dopants on the phase stability, redox potential, ionic and electronic conductivity of both Li2MnO3 and LiMnO2 phases have been investigated using density functional theory.

Sign in / Sign up

Export Citation Format

Share Document