Morphology and Electrical Conductivity of Carbon Nanocoatings Prepared from Pyrolysed Polymers

Conductive carbon nanocoatings (conductive carbon layers—CCL) were formed onα-Al2O3model support using three different polymer precursors and deposition methods. This was done in an effort to improve electrical conductivity of the material through creating the appropriate morphology of the carbon layers. The best electrical properties were obtained with use of a precursor that consisted of poly-N-vinylformamide modified with pyromellitic acid (PMA). We demonstrate that these properties originate from a specific morphology of this layer that showed nanopores (3-4 nm) capable of assuring easy pathways for ion transport in real electrode materials. The proposed, water mediated, method of carbon coating of powdered supports combines coating from solution and solid phase and is easy to scale up process. The optimal polymer carbon precursor composition was used to prepare conductive carbon nanocoatings on LiFePO4cathode material. Charge-discharge tests clearly show that C/LiFePO4composites obtained using poly-N-vinylformamide modified with pyromellitic acid exhibit higher rechargeable capacity and longer working time in a battery cell than standard carbon/lithium iron phosphate composites.

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Selective Extraction of Lithium from a Spent Lithium Iron Phosphate Battery by Mechanochemical Solid-phase Oxidation

Green Chemistry ◽

10.1039/d0gc03683h ◽

2021 ◽

Author(s):

Kang Liu ◽

Lili Liu ◽

Quanyin Tan ◽

Jinhui Li

Keyword(s):

Cathode Materials ◽

Lithium Iron Phosphate ◽

Solid Phase ◽

Iron Phosphate ◽

Selective Extraction ◽

Green Process ◽

Rapid Extraction ◽

Phase Oxidation

This study proposes a green process for selective and rapid extraction of lithium from the cathode materials of spent lithium iron phosphate (LiFePO4) batteries via mechanochemical solid-phase oxidation. The advantages...

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INFLUENCE OF ALUMINUM ON PHYSICO-CHEMICAL PROPERTIES OF LITHIUM IRON PHOSPHATE

Functional Materials Letters ◽

10.1142/s1793604711001877 ◽

2011 ◽

Vol 04 (02) ◽

pp. 123-127 ◽

Cited By ~ 4

Author(s):

MUNEHIRO KIMURA ◽

KONRAD ŚWIERCZEK ◽

JACEK MARZEC ◽

JANINA MOLENDA

Keyword(s):

Electrical Conductivity ◽

Chemical Composition ◽

Lithium Batteries ◽

Lithium Iron Phosphate ◽

Chemical Properties ◽

Iron Phosphate ◽

Electrochemical Tests ◽

Physico Chemical ◽

Spectroscopy Studies ◽

Initial Results

In this work we present results of measurements of structural (XRD), microstructural (SEM, EDX, TEM) and transport (electrical conductivity, Seebeck coefficient) properties as well as results of Mössbauer and FTIR spectroscopy studies of phospho-olivine materials with assumed chemical composition Li 1-3x Al x FePO 4 (x = 0, 0.001, 0.005, 0.01, 0.02, 0.05 and 0.1). Based on the performed research, possibility of lithium sublattice doping by Al is discussed. Additionally, initial results of electrochemical tests of lithium batteries with obtained, phospho-olivine based cathode materials are provided.

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Research on Preparation of Nano-porous Lithium Iron Phosphate for Lithium-ion Battery Electrode Materials

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/735/1/012037 ◽

2020 ◽

Vol 735 ◽

pp. 012037

Author(s):

Quanmao Yu ◽

Tao Ren ◽

Xiaoxia Li ◽

Zhong Chen ◽

Qiurong Liu ◽

...

Keyword(s):

Lithium Ion Battery ◽

Electrode Materials ◽

Lithium Iron Phosphate ◽

Lithium Ion ◽

Iron Phosphate ◽

Battery Electrode

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Research of LiFePO4 as Positive Electrode Materials

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.217-219.792 ◽

2012 ◽

Vol 217-219 ◽

pp. 792-795

Author(s):

Ling Na Sun

Keyword(s):

Electrode Materials ◽

Lithium Iron Phosphate ◽

Lithium Ion ◽

Iron Phosphate ◽

Positive Electrode ◽

Research Progress ◽

Rechargeable Battery ◽

Porous Structures ◽

And Performance ◽

Positive Electrode Materials

LiFePO4 is a promising cathode material for the next generation of a lithium-ion rechargeable battery. This paper introduces the research progress in recent years on LiFePO4 as positive electrode materials for lithium ion batteries. The methods of the preparation and modification, relation ship between structure and performance, and prospect of olivine-type lithium iron phosphate cathode materials was reviewed. Porous structures offer the potential to improve the electrochemical properties of LiFePO4.

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Nanomaterials for lithium-ion batteries and hydrogen energy

Pure and Applied Chemistry ◽

10.1515/pac-2016-1204 ◽

2017 ◽

Vol 89 (8) ◽

pp. 1185-1194 ◽

Cited By ~ 13

Author(s):

Irina A. Stenina ◽

Andrey B. Yaroslavtsev

Keyword(s):

Fuel Cells ◽

Lithium Ion Batteries ◽

Alternative Energy ◽

Electrode Materials ◽

Lithium Iron Phosphate ◽

Electronic Conductivity ◽

Lithium Ion ◽

Iron Phosphate ◽

Inorganic Nanoparticles ◽

Hydrogen Energy

Abstract Development of alternative energy sources is one of the main trends of modern energy technology. Lithium-ion batteries and fuel cells are the most important among them. The increase in the energy and power density is the essential aspect which determined their future development. We provide a brief review of the state of developments in the field of nanosize electrode materials and electrolytes for lithium-ion batteries and hydrogen energy. The presence of relatively inexpensive and abundant elements, safety and low volume change during the lithium intercalation/deintercalation processes enables the application of lithium iron phosphate and lithium titanate as electrode materials for lithium-ion batteries. At the same time, they exhibit low ionic and electronic conductivity. To overcome this problem the following main approaches have been applied: use of nanosize materials, including nanocomposites, and heterovalent doping. Their impact in the property change is analyzed and discussed. Hybrid membranes containing inorganic nanoparticles enable a significant progress in the fuel cell development. Different approaches to their preparation, the reasons for ion conductivity and selectivity change, as well as the prospects for their application in low-temperature fuel cells are discussed. This review may provide some useful guidelines for development of advanced materials for lithium ion batteries and fuel cells.

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Research on Performance and Preparation of LiFePO4

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.686.31 ◽

2014 ◽

Vol 686 ◽

pp. 31-35

Author(s):

Yan Li

Keyword(s):

Electrochemical Performance ◽

Cathode Material ◽

Particle Deposition ◽

Electrode Materials ◽

Lithium Iron Phosphate ◽

Lithium Ion ◽

Iron Phosphate ◽

Structure Characterization ◽

Synthetic Methods ◽

Material Particle

This paper makes use of various synthetic methods and analysis techniques, from material preparation, structure characterization of the electrochemical performance, we systematic study lithium iron phosphate, preparation electrode materials with good performance. This paper mainly aims at the two fatal drawbacks restrict the performance of LiFePO4cathode material, namely, low electron conductivity and lithium ion diffusion rate low, take the material particle, particle deposition on the surface of carbon conductive layer and Mg2+ion doping and other measures to modify it to explore, in order to improve the electrochemical performance of LiFePO4cathode material.

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A Simple Way of Pre-Doping Lithium Ion into Carbon Negative Electrode for Lithium Ion Capacitor

Materials Science Forum ◽

10.4028/www.scientific.net/msf.650.142 ◽

2010 ◽

Vol 650 ◽

pp. 142-149 ◽

Cited By ~ 8

Author(s):

Feng Wu ◽

Hua Quan Lu ◽

Yue Feng Su ◽

Shi Chen ◽

Yi Biao Guan

Keyword(s):

Electrode Materials ◽

Lithium Iron Phosphate ◽

High Capacity ◽

Negative Electrode ◽

Lithium Ion ◽

Iron Phosphate ◽

Positive Electrode ◽

Simple Strategy ◽

Lithium Ion Capacitor ◽

First Time

A simple strategy of pre-doping lithium ion into carbon negative electrode for lithium ion capacitor was introduced. In this strategy, a kind of Li-containing compound was added directly into the positive electrode of the lithium ion capacitor (LIC). When the lithium ion capacitor was charging first time, the Li-containing compound releases Li+, and the pre-doping of lithium ion into the negative electrode was performed. Here, we developed a lithium ion capacitor using Meso-carbon microbeads (MCMB)/activated carbon (AC) as the negative and positive electrode materials, respectively and use the lithium iron phosphate (LiFePO4) as the Li-containing compound, which supply the Li+ ions for pre-doping. The results demonstrated that, by adding 20 percent of LiFePO4 into the positive electrode, the efficiency of the capacitor increases from lower than 60% up to higher than 90%, and the capacitor shows good capacitance characteristics and high capacity.

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Isothermal calorimeter heat measurements of a 20Ah lithium iron phosphate battery cell

2017 Twelfth International Conference on Ecological Vehicles and Renewable Energies (EVER) ◽

10.1109/ever.2017.7935957 ◽

2017 ◽

Cited By ~ 2

Author(s):

Lluis Millet ◽

Maximilian Bruch ◽

Peter Raab ◽

Stephan Lux ◽

Matthias Vetter

Keyword(s):

Lithium Iron Phosphate ◽

Iron Phosphate ◽

Battery Cell ◽

Isothermal Calorimeter

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Mesoscopic modeling of Li insertion in phase-separating electrode materials: application to lithium iron phosphate

Physical Chemistry Chemical Physics ◽

10.1039/c4cp03530e ◽

2014 ◽

Vol 16 (41) ◽

pp. 22555-22565 ◽

Cited By ~ 29

Author(s):

Mohammad Farkhondeh ◽

Mark Pritzker ◽

Michael Fowler ◽

Mohammadhosein Safari ◽

Charles Delacourt

Keyword(s):

Phase Transition ◽

Electrode Materials ◽

Lithium Iron Phosphate ◽

Iron Phosphate ◽

Mesoscopic Modeling ◽

Proposed Model

The proposed model describes the lithiation–delithiation dynamics of LiFePO4 electrodes and is capable of simultaneously explaining various unusual behaviors observed for this phase transition material.

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