Electrospun LiFexMn1-xPO4/C Composite Nanofibers for Lithium-Ion Batteries

2021 ◽  
Vol 58 (2) ◽  
pp. 211-219
Author(s):  
Ozan Toprakci
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Cathode Materials ◽  
Composite Nanofibers ◽  
Active Material ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Step Method ◽  
Long Cycle Life ◽  
Li Ion

Since the commercialization of Li-ion batteries by Sony in 1990, the performance of cathode materials used in Li-ion batteries has improved significantly. However, Li-ion batteries cannot respond to the needs of the energy storage market in terms of energy density. In order to increase theoretical energy density of active materials, molar mass of the active material should be decreased, or electron number participating per reaction or reaction potential should be increased. In this study, it was aimed to produce cathode materials for Li-ion batteries in the form of composite nanofibers via electrospinning method. For this purpose, porous LiFexMn1-xPO4/C composite nanofibers (1 ] x ] 0) were synthesized with a scalable, two-step method (electrospinning and subsequent heat treatment). The morphological, structural and electrochemical properties of the LiFexMn1-xPO4/C composite nanofibers were determined by scanning electron microscope, X-ray diffraction and galvanostatic charge/discharge tests. Cathodes made of LiFexMn1-xPO4/C composite nanofibers showed various advantages such as long cycle life, improved electrochemical performance etc. due to the presence of carbon and LiFexMn1-xPO4 in the composite structure. With the addition of Mn to the structure of LiFePO4/C composite nanofibers, electrochemical performance was improved. LiFe0.8Mn0.2PO4/C composite nanofibers showed the best performance in terms of energy density among the samples. Further increment in Mn/Fe ratio resulted declining electrochemical capacity and energy density.

Improving the electrochemical performance of the LiNi0.5Mn1.5O4spinel by polypyrrole coating as a cathode material for the lithium-ion battery

2015 ◽  
Vol 3 (1) ◽  
pp. 404-411 ◽  
Author(s):  
Xuan-Wen Gao ◽  
Yuan-Fu Deng ◽  
David Wexler ◽  
Guo-Hua Chen ◽  
Shu-Lei Chou ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Electrochemical Performance ◽  
Cathode Material ◽  
Electrochemical Properties ◽  
Lithium Ion Battery ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Conductive Polypyrrole

Conductive polypyrrole (PPy)-coated LiNi0.5Mn1.5O4(LNMO) composites are applied as cathode materials in Li-ion batteries, and their electrochemical properties are explored at both room and elevated temperature.

Scalable synthesis of one-dimensional Na2Li2Ti6O14 nanofibers as ultrahigh rate capability anodes for lithium-ion batteries

2019 ◽  
Vol 6 (3) ◽  
pp. 646-653 ◽  
Author(s):  
Chao Wang ◽  
Xing Xin ◽  
Miao Shu ◽  
Shuiping Huang ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Li Ion Batteries ◽  
High Rate Capability ◽  
One Dimensional ◽  
Long Cycle Life ◽  
Li Ion ◽  
Scalable Synthesis

Na2Li2Ti6O14 nanofibers presented superior electrochemical performance with high rate capability and long cycle life and can be regarded as a competitive anode candidate for advanced Li-ion batteries.

Facile synthesis of porous Li-rich layered Li[Li0.2Mn0.534Ni0.133Co0.133]O2 as high-performance cathode materials for Li-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (39) ◽  
pp. 30507-30513 ◽  
Author(s):  
Chenwei Cao ◽  
Liujiang Xi ◽  
Kwan Lan Leung ◽  
Man Wang ◽  
Ying Liu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
High Performance ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Facile Synthesis ◽  
Li Ion

Porous Li-rich layered Li[Li0.2Mn0.534Ni0.133Co0.133]O2 was successfully prepared by a facile polymer-thermolysis method and exhibited superior electrochemical performance as cathode materials for lithium ion batteries.

Probing the Effect of High Energy Ball Milling on the Structure and Properties of LiNi1/3Mn1/3Co1/3O2 Cathodes for Li-Ion Batteries

2016 ◽  
Vol 13 (3) ◽  
Author(s):  
Malcolm Stein ◽  
Chien-Fan Chen ◽  
Matthew Mullings ◽  
David Jaime ◽  
Audrey Zaleski ◽  
...  
Keyword(s):  
Particle Size ◽  
Electrochemical Performance ◽  
Crystallite Size ◽  
Ball Milling ◽  
Lithium Ion ◽  
High Energy ◽  
Li Ion Batteries ◽  
Structure And Properties ◽  
Transfer Resistance ◽  
Li Ion

Particle size plays an important role in the electrochemical performance of cathodes for lithium-ion (Li-ion) batteries. High energy planetary ball milling of LiNi1/3Mn1/3Co1/3O2 (NMC) cathode materials was investigated as a route to reduce the particle size and improve the electrochemical performance. The effect of ball milling times, milling speeds, and composition on the structure and properties of NMC cathodes was determined. X-ray diffraction analysis showed that ball milling decreased primary particle (crystallite) size by up to 29%, and the crystallite size was correlated with the milling time and milling speed. Using relatively mild milling conditions that provided an intermediate crystallite size, cathodes with higher capacities, improved rate capabilities, and improved capacity retention were obtained within 14 μm-thick electrode configurations. High milling speeds and long milling times not only resulted in smaller crystallite sizes but also lowered electrochemical performance. Beyond reduction in crystallite size, ball milling was found to increase the interfacial charge transfer resistance, lower the electrical conductivity, and produce aggregates that influenced performance. Computations support that electrolyte diffusivity within the cathode and film thickness play a significant role in the electrode performance. This study shows that cathodes with improved performance are obtained through use of mild ball milling conditions and appropriately designed electrodes that optimize the multiple transport phenomena involved in electrochemical charge storage materials.

Tailoring atomic distribution in micron-sized and spherical Li-rich layered oxides as cathode materials for advanced lithium-ion batteries

2016 ◽  
Vol 4 (20) ◽  
pp. 7689-7699 ◽  
Author(s):  
Peiyu Hou ◽  
Guoran Li ◽  
Xueping Gao
Keyword(s):  
Thermal Stability ◽  
Energy Density ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Concentration Gradient ◽  
Lithium Ion ◽  
Cycle Life ◽  
Layered Oxides ◽  
Long Cycle ◽  
Long Cycle Life

A concentration-gradient doping strategy is introduced into micron-sized spherical Li-rich layered oxides. As a result, they exhibit high volumetric energy density, long cycle life and enhanced thermal stability.

scholarly journals Charge and Discharge Behaviour of Li-Ion Batteries at Various Temperatures Containing LiCoO2 Nanostructured Cathode Produced by CCSO

2015 ◽  
Vol 15 (4) ◽  
pp. 301 ◽  
Author(s):  
Y.Y. Mamyrbayeva ◽  
R.E. Beissenov ◽  
M.A. Hobosyan ◽  
S.E. Kumekov ◽  
K.S. Martirosyan
Keyword(s):  
Lithium Ion Battery ◽  
Active Material ◽  
Lithium Ion ◽  
Synthetic Approach ◽  
Capacity Fade ◽  
Li Ion Batteries ◽  
Material Loss ◽  
Method Performance ◽  
Battery Capacity ◽  
Li Ion

<p>There are technical barriers for penetration market requesting rechargeable lithium-ion battery packs for portable devices that operate in extreme hot and cold environments. Many portable electronics are used in very cold (-40 °C) environments, and many medical devices need batteries that operate at high temperatures. Conventional Li-ion batteries start to suffer as the temperature drops below 0 °C and the internal impedance of the battery  increases. Battery capacity also reduced during the higher/lower temperatures. The present work describes the laboratory made lithium ion battery behaviour features at different operation temperatures. The pouch-type battery was prepared by exploiting LiCoO<sub>2</sub> cathode material synthesized by novel synthetic approach referred as Carbon Combustion Synthesis of Oxides (CCSO). The main goal of this paper focuses on evaluation of the efficiency of positive electrode produced by CCSO method. Performance studies of battery showed that the capacity fade of pouch type battery increases with increase in temperature. The experimental results demonstrate the dramatic effects on cell self-heating upon electrochemical performance. The study involves an extensive analysis of discharge and charge characteristics of battery at each temperature following 30 cycles. After 10 cycles, the battery cycled at RT and 45 °C showed, the capacity fade of 20% and 25% respectively. The discharge capacity for the battery cycled at 25 °C was found to be higher when compared with the battery cycled at 0 °C and 45 °C. The capacity of the battery also decreases when cycling at low temperatures. It was important time to charge the battery was only 2.5 hours to obtain identical nominal capacity under the charging protocol. The decrease capability of battery cycled at high temperature can be explained with secondary active material loss dominating the other losses.</p>

Triptycene-based quinone molecules showing multi-electron redox reactions for large capacity and high energy organic cathode materials in Li-ion batteries

2018 ◽  
Vol 6 (7) ◽  
pp. 3134-3140 ◽  
Author(s):  
Ji Eon Kwon ◽  
Chang-Seok Hyun ◽  
Young Jun Ryu ◽  
Joungphil Lee ◽  
Dong Joo Min ◽  
...  
Keyword(s):  
Energy Density ◽  
Cathode Materials ◽  
Redox Reactions ◽  
High Energy ◽  
High Energy Density ◽  
Li Ion Batteries ◽  
Large Capacity ◽  
Li Ion

Triptycene bearing three benzoquinone moieties in a rigid 3-D tripod structure is capable of utilizing five-electron redox reactions that can provide a large capacity and high energy density in Li-ion cells.

Detection of trapped molecular O2 in a charged Li-rich cathode by Neutron PDF

2022 ◽  
Author(s):  
Robert House ◽  
Helen Y Playford ◽  
Ronald Smith ◽  
Jennifer Holter ◽  
Ian Griffiths ◽  
...  
Keyword(s):  
Energy Density ◽  
Cathode Materials ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Oxide Ions

Oxidation and reduction of the oxide ions in the bulk of cathode materials is a potential route towards increasing the energy density of Li-ion batteries. Here, we present neutron PDF...

Prospectives for the Use of Li-Ion Batteries in Hybrid Stand-Alone Power Sources

2019 ◽  
Vol 20 (2) ◽  
Author(s):  
Sergey Khantimerov ◽  
Ranis Fatykhov ◽  
Nail Suleimanov
Keyword(s):  
Comparative Analysis ◽  
Energy Density ◽  
Service Life ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Power Sources ◽  
Specific Energy Density ◽  
Li Ion ◽  
And Performance

Abstract In this paper, the possibility of using lithium-ion batteries in hybrid stand-alone power sources is considered. The article gives a comparative analysis of the energy and performance characteristics, the service life of lead-acid and lithium-ion batteries. It is shown that the longer service life and the specific energy density, the absence of the need for constant monitoring of the main parameters and the ability to preserve the original capacity at increased discharge currents, open the possibility of using lithium-ion batteries in hybrid stand-alone power sources.

Synthesis, microstructure, and electrochemical performance of Li-rich layered oxide cathode materials for Li-ion batteries

2019 ◽  
Vol 68 (2) ◽  
pp. 301-312 ◽  
Author(s):  
Е. V. Makhonina ◽  
L. S. Pechen ◽  
V. V. Volkov ◽  
А. М. Rumyantsev ◽  
Yu. М. Koshtyal ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Materials ◽  
Li Ion Batteries ◽  
Layered Oxide ◽  
Oxide Cathode ◽  
Li Ion
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