scholarly journals Полимерные комплексы никеля с лигандами саленового типа как многофункциональные компоненты катодов литий-ионных аккумуляторов

2021 ◽  
Vol 47 (2) ◽  
pp. 36
Author(s):  
Ю.А. Положенцева ◽  
М.В. Новожилова ◽  
И.А. Чепурная ◽  
М.П. Карушев
Keyword(s):  
Lithium Iron Phosphate ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Cathode Layer ◽  
Schiff Base Ligands ◽  
Electrode Layer ◽  
Polymer Binders ◽  
Polymeric Metal Complexes ◽  
Redox Active

This work describes the method of preparation of composite lithium-ion battery cathodes that allows total replacement of conventional polymer binders and electroconductive carbon black additives with redox-active conductive polymeric nickel complexes of salen-type Schiff base ligands in the electrode layer. The structure and electrochemical behavior of the electrodes prepared by this method have been investigated. Polymeric metal complexes have been shown to successfully perform the functions of binding and conductive components and also reversibly store charge in the lithium iron phosphate cathodes, which could result in the improvement of the specific capacity of the cathode layer, as compared with the conventional electrodes.

Excess lithium storage in LiFePO4-Carbon interface by ball-milling

2016 ◽  
Vol 09 (05) ◽  
pp. 1650053 ◽  
Author(s):  
Hua Guo ◽  
Xiaohe Song ◽  
Jiaxin Zheng ◽  
Feng Pan
Keyword(s):  
Ball Milling ◽  
Lithium Iron Phosphate ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Effective Capacity ◽  
Lithium Storage ◽  
Electrical Vehicle ◽  
Milling Method ◽  
Theoretical Specific Capacity

As one of the most popular cathode materials for high power lithium ion batteries (LIBs) of the electrical-vehicle (EV), lithium iron phosphate (LiFePO4 (LFP)) is limited to its relatively lower theoretical specific capacity of 170[Formula: see text]mAh g[Formula: see text]. To break the limits and further improve the capacity of LFP is promising but challenging. In this study, the ball-milling method is applied to the mixture of LFP and carbon, and the effective capacity larger than the theoretical one by 30[Formula: see text]mAh g[Formula: see text] is achieved. It is demonstrated that ball-milling leads to the LFP-Carbon interface to store the excess Li-ions.

Effect of LiFePO4 Cathode Thickness on Lithium Battery Performance

2015 ◽  
Vol 827 ◽  
pp. 146-150
Author(s):  
Ariska Rinda Adityarini ◽  
Eka Yoga Ramadhan ◽  
Endah Retno Dyartanti ◽  
Agus Purwanto
Keyword(s):  
Lithium Ion Battery ◽  
Polyvinylidene Fluoride ◽  
Lithium Battery ◽  
Lithium Iron Phosphate ◽  
Active Material ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Structure Characterization ◽  
Cathode Layer ◽  
Conductive Additive

Lithium ion battery is composed of three main parts, i.e. cathode, anode and electrolyte. In this work, we investigated the effect of LiFePO4 cathode composite’s thickness on performances of lithium battery. LiFePO4 cathode was prepared in a slurry that consisted of lithium iron phosphate (LiFePO4) powder as active material, acetylene black as conductive additive, polyvinylidene fluoride (PVDF) as binder, and N-methyl-2-pyrrolidone (NMP) as solvent. The slurry was then deposited on the aluminum substrate using doctor blade method in different thickness. The cathode layers were deposited with the thickness of 150, 200, 250 & 300 μm. The structure characterization of the material was analyzed by XRD, while the material’s morphology was analyzed by Scanning Electron Microscope (SEM). Performances of lithium ion battery with LiFePO4 cathode were evaluated using charge-discharge cycle test. It is found that battery made of cathode layer with 250 μm thickness shows the best performances.

scholarly journals Review of Modified Nickel-Cobalt Lithium Aluminate Cathode Materials for Lithium-Ion Batteries

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Ding Wang ◽  
Weihong Liu ◽  
Xuhong Zhang ◽  
Yue Huang ◽  
Mingbiao Xu ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Lithium Iron Phosphate ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Cycle Performance ◽  
Future Research ◽  
Lithium Aluminate ◽  
Nickel Cobalt ◽  
Lithium Cobaltate

Ternary nickel-cobalt lithium aluminate LiNixCoyAl1‐x‐yO2 (NCA, x≥0.8) is an essential cathode material with many vital advantages, such as lower cost and higher specific capacity compared with lithium cobaltate and lithium iron phosphate materials. However, the noticeably irreversible capacity and reduced cycle performance of NCA cathode materials have restricted their further development. To solve these problems and further improve the electrochemical performance, numerous research studies on material modification have been conducted, achieving promising results in recent years. In this work, the progress of NCA cathode materials is examined from the aspects of surface coating and bulk doping. Furthermore, future research directions for NCA cathode materials are proposed.

Preparation of Lithium Iron Phosphate-Carbon Composite as a Cathode for Lithium Ion Battery

2019 ◽  
Vol 966 ◽  
pp. 392-397
Author(s):  
Iman Rahayu ◽  
Atiek Rostika Noviyanti ◽  
Diana Rakhmawaty ◽  
Anni Anggraeni ◽  
Husein H. Bahti ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Lithium Iron Phosphate ◽  
Sintering Temperature ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Carbon Composite ◽  
Capacity Loss ◽  
The Stability

Lithium iron phospate-carbon composite (LiFePO4/C) was successfully synthesized with various sintering temperature in order to find best synthesis condition resulting high quality of LiFePO4/C that can be applied for environmentally friendly of cathode in lithium ion battery. It is found that the specific capacity and the stability capacity of LiFePO4/C were improved to 17.6 mAh and 40.3% of capacity loss, respectively.

Graphenised Lithium Iron Phosphate and Lithium Manganese Silicate Hybrid Cathodes: Potentials for Application in Lithium‐ion Batteries

2020 ◽  
Vol 32 (12) ◽  
pp. 2982-2999
Author(s):  
Zolani Myalo ◽  
Chinwe Oluchi Ikpo ◽  
Assumpta Chinwe Nwanya ◽  
Miranda Mengwi Ndipingwi ◽  
Samantha Fiona Duoman ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Iron Phosphate ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Manganese Silicate ◽  
Lithium Manganese

scholarly journals A Novel Pyrometallurgical Recycling Process for Lithium-Ion Batteries and Its Application to the Recycling of LCO and LFP

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 149
Author(s):  
Alexandra Holzer ◽  
Stefan Windisch-Kern ◽  
Christoph Ponak ◽  
Harald Raupenstrauch
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Iron Phosphate ◽  
Process Development ◽  
Removal Rate ◽  
Continuous Process ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Recycling Process ◽  
Subsequent Step ◽  
Pre Treatment

The bottleneck of recycling chains for spent lithium-ion batteries (LIBs) is the recovery of valuable metals from the black matter that remains after dismantling and deactivation in pre‑treatment processes, which has to be treated in a subsequent step with pyrometallurgical and/or hydrometallurgical methods. In the course of this paper, investigations in a heating microscope were conducted to determine the high-temperature behavior of the cathode materials lithium cobalt oxide (LCO—chem., LiCoO2) and lithium iron phosphate (LFP—chem., LiFePO4) from LIB with carbon addition. For the purpose of continuous process development of a novel pyrometallurgical recycling process and adaptation of this to the requirements of the LIB material, two different reactor designs were examined. When treating LCO in an Al2O3 crucible, lithium could be removed at a rate of 76% via the gas stream, which is directly and purely available for further processing. In contrast, a removal rate of lithium of up to 97% was achieved in an MgO crucible. In addition, the basic capability of the concept for the treatment of LFP was investigated whereby a phosphorus removal rate of 64% with a simultaneous lithium removal rate of 68% was observed.

Modification of liquid-phase synthesis of lithium-iron phosphate, a cathode material for lithium-ion battery

2012 ◽  
Vol 85 (6) ◽  
pp. 879-882 ◽  
Author(s):  
E. N. Kudryavtsev ◽  
R. V. Sibiryakov ◽  
D. V. Agafonov ◽  
V. N. Naraev ◽  
A. V. Bobyl’
Keyword(s):  
Liquid Phase ◽  
Cathode Material ◽  
Lithium Ion Battery ◽  
Lithium Iron Phosphate ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Phase Synthesis

Iron Phosphates as Cathodes of Lithium-Ion Batteries

2006 ◽  
Vol 973 ◽  
Author(s):  
Shijun Wang ◽  
M. Stanley Whittingham
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Iron Phosphate ◽  
Low Cost ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Environmentally Benign ◽  
Iron Phosphates ◽  
Electrochemical Capacity ◽  
High Theoretical Capacity ◽  
Olivine Structure

ABSTRACTThis study focusses on optimizing the parameters of the hydrothermal synthesis to produce iron phosphates for lithium ion batteries, with an emphasis on pure LiFePO4 with the olivine structure and compounds containing a higher iron:phosphate ratio. Lithium iron phosphate (LiFePO4) is a promising cathode candidate for lithium ion batteries due to its high theoretical capacity, environmentally benign and the low cost of starting materials. Well crystallized LiFePO4 can be successfully synthesized at temperatures above 150 °C. The addition of a reducing agent, such as hydrazine, is essential to minimize the oxidation of ferrous (Fe2+) to ferric (Fe3+) in the final compound. The morphology of LiFePO4 is highly dependent on the pH of the initial solution. This study also investigated the lipscombite iron phosphates of formula Fe1.33PO4OH. This compound has a log-like structure formed by Fe-O octahedral chains. The chains are partially occupied by the Fe3+ sites, and these iron atoms and some of the vacancies can be substituted by other cations. Most of the protons can be ion-exchanged for lithium, and the electrochemical capacity is much increased.

Synthesis and Characterization of Mg and Ti Ions Co-Doped Lithium Iron Phosphate and Its Lithium-Ion Batteries

2012 ◽  
Vol 28 (09) ◽  
pp. 2084-2090 ◽  
Author(s):  
WANG Zhen-Po ◽  
◽  
LIU Wen ◽  
WANG Yue ◽  
ZHAO Chun-Song ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Iron Phosphate ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Synthesis And Characterization ◽  
Co Doped
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