Effect of Iron Source and Temperature on Charge/Discharge Performance of LiFePO4

2012 ◽  
Vol 509 ◽  
pp. 46-50
Author(s):  
Hong Quan Liu ◽  
Fei Xiang Hao ◽  
Feng Lin Yao ◽  
Yi Jie Gu ◽  
Yun Bo Chen
Keyword(s):  
Thermal Reduction ◽  
Ion Diffusion ◽  
Diffusion Distance ◽  
Sem Images ◽  
Discharge Performance ◽  
Positive Electrode Material ◽  
Li Ion ◽  
Pure Phases ◽  
Charge Discharge ◽  
Discharge Curves

LiFePO4 compound has been paid considerable attention as a promising positive electrode material. In this work, LiFePO4 compound was synthesized by the solid carbon thermal reduction reactions，where Fe2O3, Fe(OH)3 and FeSO4 is used as the iron resource respectively. All the synthesized products are pure phases except that using FeSO4 as the iron resource. The SEM images show porous morphologies, but different iron resource samples show different degree of pore ratio. According to the results of charge/discharge curves, capacity of the sample prepared by Fe(OH)3 as the iron resource shows superior to those of other samples. The result is attributed to more pores in the sample, which is benefit to electrolyte penetrating, short Li-ion diffusion distance.

Effect of Li Source on Charge/Discharge Performance of LiFePO4

2012 ◽  
Vol 509 ◽  
pp. 51-55
Author(s):  
Hong Quan Liu ◽  
Fei Xiang Hao ◽  
Yi Jie Gu ◽  
Yun Bo Chen
Keyword(s):  
Low Cost ◽  
Utilization Efficiency ◽  
Ion Diffusion ◽  
Diffusion Distance ◽  
Pore Characteristics ◽  
Discharge Performance ◽  
High Theoretical Capacity ◽  
Low Toxicity ◽  
Li Ion ◽  
Potential Plateau

LiFePO4 has been considered as the most promising positive electrode due to its low cost, high theoretical capacity, stability and low toxicity, all highly required in vehicle applications. In this work, LiFePO4 compound was synthesized by the solid carbothermic reduction reactions with different Li resource. The pure LiFePO4 phase was confirmed for all samples by analysis of the XRD results. The different morphologies were obtained due to different Li resources. The potential plateau of all samples is in the range from 3V to 4V. The sample (LiCO3 as the Li resource) has a higher discharge capacity of 118mAhg−1 at 0.2C 20% greater than that of the sample (LiOH as the Li resource). The reason comes maybe from nano pore characteristics, which reduce Li ion diffusion distance, and increase the utilization efficiency of material.

scholarly journals Sustainable Anodes for Lithium- and Sodium-Ion Batteries Based on Coffee Ground-Derived Hard Carbon and Green Binders

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6216
Author(s):  
Hamideh Darjazi ◽  
Antunes Staffolani ◽  
Leonardo Sbrascini ◽  
Luca Bottoni ◽  
Roberto Tossici ◽  
...  
Keyword(s):  
Food Waste ◽  
Anode Materials ◽  
Active Material ◽  
Added Value ◽  
Hard Carbon ◽  
Great Opportunity ◽  
Discharge Performance ◽  
Coffee Ground ◽  
Li Ion ◽  
Charge Discharge

The reuse and recycling of products, leading to the utilization of wastes as key resources in a closed loop, is a great opportunity for the market in terms of added value and reduced environmental impact. In this context, producing carbonaceous anode materials starting from raw materials derived from food waste appears to be a possible approach to enhance the overall sustainability of the energy storage value chain, including Li-ion (LIBs) and Na-ion batteries (NIBs). In this framework, we show the behavior of anodes for LIBs and NIBs prepared with coffee ground-derived hard carbon as active material, combined with green binders such as Na-carboxymethyl cellulose (CMC), alginate (Alg), or polyacrylic acid (PAA). In order to evaluate the effect of the various binders on the charge/discharge performance, structural and electrochemical investigations are carried out. The electrochemical characterization reveals that the alginate-based anode, used for NIBs, delivers much enhanced charge/discharge performance and capacity retention. On the other hand, the use of the CMC-based electrode as LIBs anode delivers the best performance in terms of discharge capacity, while the PAA-based electrode shows enhanced cycling stability. As a result, the utilization of anode materials derived from an abundant food waste, in synergy with the use of green binders and formulations, appears to be a viable opportunity for the development of efficient and sustainable Li-ion and Na-ion batteries.

A Study on the Battery Parameter Testing Equipment

2011 ◽  
Vol 148-149 ◽  
pp. 67-70
Author(s):  
Feng Xiao ◽  
Liang Han ◽  
Xin Pan Chu ◽  
Jun Feng Xue ◽  
Qi Biao Chen ◽  
...  
Keyword(s):  
High Power ◽  
Formation Process ◽  
Testing Equipment ◽  
Active Materials ◽  
Discharge Performance ◽  
Power Battery ◽  
New Type ◽  
Li Ion ◽  
Charge Discharge

Li-ion power battery which has a broad prospect of application in many industry fields is a new type of high power battery. The formation is a key process in battery manufacture. After formation, the active materials of anode and cathode in the battery can be activated. Consequently, the charge-discharge performance, self-discharge performance, reserve performance and some other comprehensive performances can be improved. Only after formation can batteries achieve the best performance. With the change of formation process, the formation and holding for a single battery has been changed to for a group. Therefor, a new type of battery parameter testing equipment needs to be designed, which can test a group of batteries automatically. This paper will introduce the design of this equipment thoroughly.

ELECTROCHEMICALLY ACTIVE LITHIATED NICKEL OXIDE FILMS FABRICATED BY NOVEL THERMAL SYNTHESIS USING Ni/Li/Ni FILMS

2009 ◽  
Vol 02 (01) ◽  
pp. 37-40 ◽  
Author(s):  
GYUBONG CHO ◽  
KIWON KIM ◽  
TAEHYUN NAM
Keyword(s):  
Nickel Oxide ◽  
Oxide Films ◽  
X Ray Diffraction ◽  
Thermal Synthesis ◽  
Annealing Conditions ◽  
Electrochemically Active ◽  
Li Ion ◽  
Nickel Oxide Films ◽  
Charge Discharge ◽  
Discharge Curves

Lithiated nickel oxide films were thermally synthesized using Ni / Li / Ni films at various temperatures between 873 K and 1123 K. Structural and electrochemical properties of the synthesized films were investigated by means of X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and galvanostatic charge–discharge half-cell tests between 4.5 V and 2.5 V. Lithiated nickel oxide films with the composition near stoichiometric LiNiO 2 could be obtained under annealing conditions (973–1073 K, 1 h). Surfaces of synthesized films consisted of some particles and became smoother with an increase in annealing temperature. Particles with the sharpest edge were formed at 1023 K. Cells with synthesized electrodes showed reversible Li ion transfer and clear voltage plateaus in charge–discharge curves that can confirm the phase transformation of LiNiO 2.

scholarly journals The Effect of Excessive Sulfate in the Li-Ion Battery Leachate on the Properties of Resynthesized Li[Ni1/3Co1/3Mn1/3]O2

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6672
Author(s):  
Jimin Lee ◽  
Sanghyuk Park ◽  
Mincheol Beak ◽  
Sang Ryul Park ◽  
Ah Reum Lee ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Acid Leaching ◽  
Precipitation Method ◽  
Electrochemical Performances ◽  
Active Materials ◽  
Sem Images ◽  
X Ray ◽  
Li Ion ◽  
Co Precipitation ◽  
Charge Discharge

In order to examine the effect of excessive sulfate in the leachate of spent Li-ion batteries (LIBs), LiNi1/3Co1/3Mn1/3O2 (pristine NCM) and sulfate-containing LiNi1/3Co1/3Mn1/3O2 (NCMS) are prepared by a co-precipitation method. The crystal structures, morphology, surface species, and electrochemical performances of both cathode active materials are studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and charge-discharge tests. The XRD patterns and XPS results identify the presence of sulfate groups on the surface of NCMS. While pristine NCM exhibits a very dense surface in SEM images, NCMS has a relatively porous surface, which could be attributed to the sulfate impurities that hinder the growth of primary particles. The charge-discharge tests show that discharge capacities of NCMS at C-rates, which range from 0.1 to 5 C, are slightly decreased compared to pristine NCM. In dQ/dV plots, pristine NCM and NCMS have the same redox overvoltage regardless of discharge C-rates. The omnipresent sulfate due to the sulfuric acid leaching of spent LIBs has a minimal effect on resynthesized NCM cathode active materials as long as their precursors are adequately washed.

Novel Low-Temperature Electrolyte for Li-Ion Battery

2011 ◽  
Vol 287-290 ◽  
pp. 1283-1289 ◽  
Author(s):  
Yong Huan Ren ◽  
Chun Wei Yang ◽  
Bo Rong Wu ◽  
Cun Zhong Zhang ◽  
Shi Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Room Temperature ◽  
Poor Performance ◽  
Temperature Series ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Half Cell ◽  
Li Ion ◽  
Charge Discharge ◽  
Discharge Curves

In order to overcome the limitation of Li-ion batteries at low temperature, series of electrolytes are prepared. Specially，FEC is chose to work as electrolyte solvent to enhance its poor performance. Electrolytes are composed of EC, PC, EMC and FEC, while VC is added as additive. Electrolytes with different ratio are examined, then the electrolyte with the best conductivity is studied in detail. Its characters are evaluated by CV, EIS and charge/discharge tests et al. The discharge curves of LiCo1/3Ni1/3Mn1/3O2/Li show that battery with this FEC-based electrolyte at 233K could yield 51% of room temperature capacity. Most obviously, MCMB/Li half cell with this electrolyte could fill 91% of its normal capacity at 233K while batteries barely charge any with traditional electrolyte（LiPF6/EC+DMC(1:1 in volume)）. This nice charge behavior won’t emerge unless the conductivity could basically meet the demand at 233K. The property of FEC-based electrolyte outweighs commercialized electrolyte as this article confirms.

Boundaries of charge-discharge curves of batteries

2022 ◽  
Author(s):  
Amir Haghipour ◽  
Maryam TaherTalari ◽  
Mohammad Mahdi Kalantarian
Keyword(s):  
Energy Storage ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Li Ion ◽  
Underlying Mechanisms ◽  
Discharge Behaviour ◽  
Charge Discharge ◽  
Discharge Curves

Understanding underlying mechanisms of charge-discharge behaviour of batteries, especially the intercalation Li-ion and Na-ion ones, is obligatory to develop and design the energy storage devices. The behaviour of the voltage-capacity/time...

Functional ionic liquids for enhancement of Li-ion transfer: the effect of cation structure on the charge–discharge performance of the Li4Ti5O12 electrode

2016 ◽  
Vol 18 (7) ◽  
pp. 5139-5147 ◽  
Author(s):  
Masahiro Shimizu ◽  
Hiroyuki Usui ◽  
Hiroki Sakaguchi
Keyword(s):  
Ionic Liquids ◽  
Ion Transfer ◽  
Solvation Number ◽  
Raman Analysis ◽  
Discharge Performance ◽  
Li Ion ◽  
Charge Discharge

Raman analysis revealed the following: the PP1MEM cation weakens the interaction between Li ion and TFSA anions, and thereby diminishes the solvation number of TFSA anions (NTFSA 1.56) compared with that of PP16-TFSA (NTFSA 2.40).

scholarly journals Synthesis and Characterization of MnFe2O4 Nanoparticles and its Electrochemical Performance Evaluated as Anode for Li-ion Battery Applications

2019 ◽  
Vol 9 (2S2) ◽  
pp. 308-312
Keyword(s):  
Electrochemical Performance ◽  
Electrochemical Impedance ◽  
Impedance Analysis ◽  
Li Ion Battery ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
Discharge Performance ◽  
Li Ion ◽  
Mnfe2o4 Nanoparticles ◽  
Charge Discharge

In the last decade, large number of research has been made to increase the capacity of anodes by changing the graphite with Si or Sn and conversion based materials such as MnFe2O4 , Co3O4 , Fe2O3 and NiO etc.,. In the present work, MnFe2O4 nanoparticles has synthesized by simple solid-state method. The crystal structure of MnFe2O4 evaluated by powder X-ray diffraction (XRD) and its morphology invetigated by Scanning Electron Microscopy (SEM), and its electrochemical performance has been carried out by Cyclic Voltammetry (CV), charge-discharge and electrochemical impedance analysis (EIS). The results of charge-discharge performance showed an excellent discharge capacity of 860 mA hg-1 when tested as anode for Li-ion battery applications.

scholarly journals Investigation of Na-immigration into olivine LiFePO4

2019 ◽  
Vol 3 (1) ◽  
pp. 46-54
Author(s):  
Hoang Anh Nguyen ◽  
Pham Phuong Nam Le ◽  
Le Thanh Nguyen Huynh ◽  
Tran Van Man ◽  
My Loan Phung Le
Keyword(s):  
Electrochemical Oxidation ◽  
Large Scale ◽  
Hydrothermal Process ◽  
Rechargeable Batteries ◽  
Ex Situ ◽  
Portable Devices ◽  
Discharge Process ◽  
Sem Images ◽  
Li Ion ◽  
Charge Discharge

In 21th century, rechargeable batteries are main key of modern technology in many applications from portable devices (smartphone, laptop) to large-scale (hydride electric vehicle-HEV, smart grid system). Among the rechargeable batteries, Li-ion battery (LIB) is outstanding member due to the highest gravimetric as well as volumetric capacity; and Sodium-ion batteries (SIBs) can have contribution to alternating LIBs in large-scale application. Li-ion and Na-ion batteries have the same configuration with an insertion/extraction reversible of Li+ ions and Na+ ions into electrode positive and negative during charge-discharge process. This work aimed to investigate Na-immigration into olivine LiFePO4. The olivine phase LiFePO4 was prepared by hydrothermal process. The synthesized LiFePO4 was characterized the structure, morphology and electrochemical properties. The XRD pattern showed the high crystalline and, the Rietveld refinement with X2 = 2.32% confirmed the highly pure olivine phase without impurity. The SEM images exhibited the uniform and good distribution of synthesized olivine in submicrometric scale. The delithiated phase FePO4 was prepared by electrochemical oxidation at low rate C/20. The charge-discharge curves demonstrated the reversible Na-immigration into olivine host with a highest capacity of 80 mAh/g, the cyclability was found out in 73 mAh/g upon 30 cycles. The ex-situ XRD (electrode after electrochemical oxidation, electrode after Na-insertion) revealed the stability of FePO4 framework during Na-immigration.  

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