Li4Ti5O12 via electrospinning
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Li 4 Ti 5 O 12 is produced via electrospinning for use as an anode material in lithium-ion batteries. The document discusses the structure and lithium intercalation behavior of Li 4 Ti 5 O 12 , its production through electrospinning, and results from cyclic voltammetry testing. Electrospinning parameters like solvent composition and feed rate are optimized to produce stoichiometric Li 4 Ti 5 O 12 that crystallizes after heat treatment to the desired cubic spinel phase.
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International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
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The document describes research on photoelectrocatalytic degradation of salicylic acid using sprayed gold doped iron oxide thin films. Gold doped iron oxide films were deposited via spray pyrolysis and characterized. XRD showed the films were polycrystalline hematite. SEM showed needle-shaped grains of 100-150nm. Electrical resistivity decreased with gold doping up to 2%. The 2% gold doped film had the highest photocurrent and degraded 75% of salicylic acid in 320 minutes under visible light irradiation, making it the best photoelectrode developed in the study.
Electrode - Electrolyte Interface Studies in Lithium Batteries
Compilation of studies conducted at the Institut des Matériaux de Nantes under the supervision of Dr. Dominique Guyomard between 2008 and 2012.
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GC_ACS_SLC_032209
This document discusses the design and operation of molecular rotary motors at interfaces. It describes:
1) How rotary motors in biology inspired the design of an artificial molecular rotor with a photoisomerizable double bond that undergoes a light-driven unidirectional rotary cycle.
2) Methods explored to control the speed of rotation, attach the motors to surfaces, and demonstrate light-driven rotary motion of surface-bound motors.
3) Efforts to utilize the rotary motion to perform work, such as stirring molecules at the interface, which could enable applications if the random motion of the motors can be confined and directed.
IRJET- Lanthanum Doped Strontium Titanate as photoanode by Pechini method for...
The document summarizes research on synthesizing lanthanum-doped strontium titanate (LST) powder via the Pechini method for use as a photoanode material in dye-sensitized solar cells (DSSCs). Key points:
1) LST was synthesized via a Pechini sol-gel process using titanium isopropoxide, lanthanum nitrate, and strontium nitrate precursors.
2) Characterization showed the material had a crystalline perovskite structure, spherical nanoparticle morphology, and bandgap of 3.5eV suitable for DSSC photoanodes.
3) BET analysis found the LST had a high surface area
Acs 2009 3 22 Final
The document discusses using a LiClO4/PS-PEO-PS complex as a gate dielectric for organic thin film transistors (OTFTs). It describes how adding LiClO4 salt to the triblock copolymer induces ordered lamellar structures that provide a smooth surface and high capacitance of around 1500 nF/cm2. This makes the material promising as a gate dielectric for OTFTs, offering advantages over other dielectric materials in terms of capacitance, surface roughness, and dielectric performance.
Presentation-Vacuum.pptx
This document summarizes research on tri-layered magnetoelectric composites containing Metglas and various piezoelectric crystals. Key findings include:
1) Composites of Metglas/lithium niobate (LNO) and Metglas/gallium phosphate (GPO) exhibited direct magnetoelectric voltage coefficients of up to 0.95 V/(cm·Oe) and 0.24 V/(cm·Oe), respectively.
2) Under electromechanical resonance, the Metglas/LNO composite showed a very large coefficient of 250 V/(cm·Oe), while the Metglas/GPO composite showed a maximum of 23 V/(
Conductometric Investigations on Ni II Thiosemicarbazone Systems
The therapeutic importance of thiosemicarbazone group containing ligands has promoted the selection of this class of ligands and their complexes for the study. This paper describes the conductometric investigations on few Ni II thiosemicarbazone complexes. The conductometric studies have been carried out in doubly distilled water, Triton X 100 and Brij 35 mediums. Association constants and formation constants have been computed and different types of stoichiometry M L have been observed for metal ligand complexes as 1 2, 1 3, 1 4 etc. Uma Rathore "Conductometric Investigations on Ni (II)-Thiosemicarbazone Systems" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-7 | Issue-4, August 2023, URL: https://www.ijtsrd.com/papers/ijtsrd59751.pdf Paper Url:https://www.ijtsrd.com/chemistry/physical-chemistry/59751/conductometric-investigations-on-ni-iithiosemicarbazone-systems/uma-rathore
Fianl PPT Nanotechnology.ppt
This document summarizes recent progress in photocatalytic water splitting and the author's preliminary work. It discusses the significance of hydrogen energy, the mechanism of photocatalytic water splitting, and recent developments in using materials like Sm2Ti2S2O5, AgInZn7S9, and CdS for water splitting. It then describes the author's experiments studying hydrogen and oxygen evolution using CdO photocatalysts and the effects of calcination temperature and adding dopants like La2O3 and RuO2. The author's next plans involve further investigating electron acceptors for CdO, different loading species on CdO, and synthesizing doped CdO and other sulfide photocatalysts.
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poster PM
This document summarizes research on using a composite of silica-rich diatomaceous earth and graphene oxide as an anode material for lithium-ion batteries. The composite was produced by mixing graphene oxide, carbon black, and diatomaceous earth into a slurry with a binder and coating it onto a copper foil. Testing showed the material underwent faradaic reactions involving the reduction of silica and lithiation of silicon, as evidenced by HRTEM, SAED, and XPS data. The graphene oxide coating allowed these electrochemical reactions to occur by making the silica conductive. The composite exhibited a capacity over 600 mAh/g at a C/20 discharge rate, demonstrating its potential as an
Ecs 221 zn_o-fianall
The document summarizes research on the effect of ZnO treatment on the cathode material 0.5Li2MnO3.0.5LiNi0.5Mn0.5O2 for lithium-ion batteries. Key findings include:
1) ZnO treatment led to faster activation of the material, higher charge/discharge capacity, improved columbic efficiency, and better rate performance compared to the untreated material.
2) Characterization showed the ZnO treated material had lower charge transfer resistance, enhancing electrochemical performance.
3) Further optimization of ZnO content and understanding reaction mechanisms could improve stability and performance.
LLNC Presentaion Sham group
Li5+3xLa3Nb2-xCaxO12 solid state electrolytes were synthesized for battery applications. For compositions where x=0, 0.05, 0.1, 0.15, 0.2, and 0.25, samples were prepared through ball milling and calcination up to 1150°C. XRD showed all compositions formed the garnet structure. Conductivity as measured by EIS increased with Ca content and higher sintering temperature. Stability in water decreased with higher Ca, though the base composition was stable. A new composition, Li5.55(La2.9Ca0.1)(Nb1.85Ca0.15)O12, was also
FAME2013_Reasearch_Poster
1. Electrocatalysis with a TiO2 coated foil produces appreciable levels of the germicidal species triiodide (I3-) from iodide (I-) at applied voltages between 0.80-1.0 volts.
2. Higher voltages between 0.80-1.0 volts resulted in greater production of I3-, while voltages at or below 0.5 volts produced only background levels.
3. The production of I3- was decreased by approximately 71% when the system was purged with nitrogen gas, indicating oxygen plays a role in one of the pathways for I3- synthesis.
Electrical power from heat: All-scale hierarchical thermoelectrics with and w...
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Palestra plenária do XII Encontro da SBPMat (Campos do Jordão, setembro/outubro de 2013). Palestrante: Mercouri G Kanatzidis - Northwestern University e Argonne National Laboratory (EUA).Energia r.p.h.chang
R.P.H. Chang presented research on using nanotechnology to develop future solar cells, supercapacitors, and sensors. Three examples from his lab were discussed: (1) hybrid solar cells using materials like SnIx-based perovskites as sensitizers, (2) integrating supercapacitors for energy storage, and (3) plasmonic sensors in the infrared region. Nanotechnology is urgently needed to address global problems through worldwide collaboration and education on technologies like more efficient solar cells and energy storage solutions.
Properties of coordination compoundes part 1 of 3
Applications of Crystal Field Theory to explain physical properties of coordination compounds, such as color, lattice energy, hydration energy and Spinel types
Review-on-solid-electrolytes-for-all-solid-state-lith_2018_Journal-of-Power-.pdf
This document provides a review of solid electrolytes for all-solid-state lithium-ion batteries. It discusses several types of solid electrolytes that have been investigated, including NASICON, garnet, perovskite, LISICON, LiPON, Li3N, sulfide, argyrodite, and anti-perovskite electrolytes. For NASICON-type electrolytes specifically, the document outlines their crystal structure, discusses how doping affects ionic conductivity, and notes issues like compatibility with anode materials. The review aims to provide a comprehensive overview of key solid electrolyte types and properties, as well as gaps that need to be addressed for all-solid-state batteries.
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Li4Ti5O12 via electrospinning
- 1. Li 4 Ti 5 O 12 via Electrospinning Antonio Susanna 25/03/11
- 3. Yukinori Koyama, Timothy E. Chin, Urs Rhyner, Richard K. Holman, Steven R. Hall. Advance functional material. 2006 . 16 , 492–498 Why does L 4 Ti 5 O 12 use? Cycling-life of 5000 0.4 V +53 % +260 % Li 4.4 Sn β-Sn 0.3 V +60 % +311 % Li 4.4 Si Si 1.5 V 0.0 – 0.1 % 0.0 – 0.3 % Li 7 Ti 5 O 12 Li 4 Ti 5 O 12 0.1 V +4.2 % +13.1 % 1/6 LiC 6 C (graphite) Li-insertion 3.8 V -0.9% -2.8 % Li 0.5 NiO 2 LiNiO 2 4.0 V -2.5 % -7.3 % Mn 2 O 4 LiMn 2 O 4 3.4 V -2.2 % -6.5 % FePO 4 LiFePO 4 4.0 V 0.6 % +1.9 % Li 0.5 CoO 2 LiCoO 2 Li-extraction Potential vs. Li/Li + Linear strain [a] ∆ L/L 0 Volume strain ∆ V/V 0 Limiting composition Lithium-storage compound
- 4. Li 4 Ti 5 O 12 (Fd-3m) cubic, spinel phase Martin Wilkening, Wojciech Iwaniak,Jessica Heine. Phys. Chem. Chem. Phys., 2007 , 9, 6199–6202 | 6199. 16d 8a 16c
- 5. Erin M. Sorensen Chem. Mater., Vol. 16, No. 26, 2004 [Li (1+x/3) ] 8a/16c [Li 1/3 Ti 5/3 ] 16d O 4 32e {0 ≤ x ≤ 3} Li 4 Ti 5 O 12 {x = 0} ↔ Li 7 Ti 5 O 12 {x = 3} Ti 4+ ↔ Ti 3+ Li 7 Ti 5 O 12 became a metallic electron structure (Ti-3d )
- 6. Li 4 Ti 5 O 12 ↔ Li 7 Ti 5 O 12 ↔ Li 8.5 Ti 5 O 12 ↔ Li 10 Ti 5 O 12 x = 0 -> x = 3 -> x = 4.5 -> x = 6 8a sites full -> 16c sites full -> 16c sites full and 8a half full -> 16c and 8a completed Martin Wilkening, Wojciech Iwaniak,Jessica Heine. Phys. Chem. Chem. Phys., 2007 , 9, 6199–6202 | 6199. Further intercalation 175 mAh/g (0.3 %) 260 mAh/g (0.4 %) [Li (1+x/3 )] 8a/16c [Li 1/3 Ti 5/3 ] 16d O 4 32e
- 7. Electrospinning set-up 12.31 Needle voltage [KV] -1.68 Collector voltage [KV] ** Distance needle-collector [cm] 35 Feeding rate [ml/h] valour Parameters
- 11. ****:EtOH=6.6:15 wt % BzOH:****=77:0.92 wt % ****** CH 3 -O-CH 3 **** (MtOH) 3- 4% + 1. 2. Centrifugation (7000 rpm for 5 min.) Powder Dissolution in **** 3. I method by *********.
- 12. I Holder ****/HOiPr Drying up Calcination at 800 °C for 8 h. Calcination at 800 °C for 8 h. Calcination at 800 °C for 8 h. Drying up Drying up Drying up II Holder *****/HOiPr/ ****(10wt%) Advantage: stoichiometric ratio. II method . Calcination at 800 °C for 8 h .
- 13. calculated from ICSD using POWD-12++ ( 1997 ) (800 °C) Unit cell volume 577 Å 3
- 14. A 1g +E g +3F 2g Guofeng Yana, Haisheng Fanga, Huijuan Zhaob, Journal of Alloys and Compounds 470 ( 2009 ) 544–547 b) Raman spectroscopy 200 400 600 800 1000 1200 1400 (273) (741) (672) (432) (353) Intensity [a.u.] Raman shift [cm -1 ] (233) a) F 2g A 1g E g F 2g F 2g
- 15. M. Ganesan & M. V. T. Dhananjeyan & K. B. Sarangapani & N. G.Renganathan J Electroceram ( 2007 ) 18:329–337 Cyclic voltammmetry (0.1 mVs -1 )
- 16. Thank you for attention.