Facile Synthesis of Donut-like TiO2-SnO2 Nanocomposite Microspheres by a Two-step Hydrothermal Reaction and Subsequent Spray Drying Process and Its Electrochemical Lithium Storage Properties

2013 ◽  
Vol 16 (2) ◽  
pp. 083-087
Author(s):  
Mengyao Tian ◽  
Chunju Lv ◽  
Jie Xu ◽  
Bing Guo ◽  
Da Chen ◽  
...  
Keyword(s):  
Spray Drying ◽  
Hydrothermal Reaction ◽  
Substitutional Solid Solution ◽  
Lithium Storage ◽  
Electrochemical Test ◽  
Rutile Structure ◽  
Tetragonal Rutile Structure ◽  
Titanate Nanowires ◽  
Drying Treatment ◽  
A Current

Donut-like TiO2-SnO2 nanocomposite microspheres were successfully synthesized via a facile two-step hydrothermal reaction and subsequent spray drying. The protonated titanate nanowires with H2Ti3O7 phase in the nanocomposite precursor transformed into not anatase TiO2 but TiO2(B) crystal structure even after calcination at 400 ?. And the substitutional solid solution (Sn, Ti)O2 with the same tetragonal rutile structure as SnO2 was formed. Moreover, the hierarchical donut-like structure in TiO2-SnO2 nanocomposite microspheres constructed by the second-step hydrothermal and spray drying treatment was maintained after calcination at 400 ?. The electrochemical test showed that the as-obtained TiO2-SnO2 nanocomposite microspheres reached an initial discharge capacity of 640 m Ah g-1 at a current density of 40 mA.g-1, which is much higher than the theoretical capacity of TiO2(B).

scholarly journals Boron-Doped Carbon Nano-/Microballs from Orthoboric Acid-Starch: Preparation, Characterization, and Lithium Ion Storage Properties

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Xinhua Lu ◽  
Lin Chen
Keyword(s):  
Current Density ◽  
Carbon Nanostructures ◽  
Hydrothermal Reaction ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Lithium Storage ◽  
Boron Doped ◽  
Specific Discharge ◽  
Boron Source ◽  
A Current

A boron-doped carbon nano-/microballs (BC) was successfully obtained via a two-step procedure including hydrothermal reaction (180°C) and carbonization (800°C) with cheap starch and H3BO3 as the carbon and boron source. As a new kind of boron-doped carbon, BC contained 2.03 at% B-content and presented the morphology as almost perfect nano-/microballs with different sizes ranging from 500 nm to 5 μm. Besides that, due to the electron deficient boron, BC was explored as anode material and presented good lithium storage performance. At a current density of 0.2 C, the first reversible specific discharge capacity of BC electrode reached as high as 964.2 mAh g–1 and kept at 699 mAh g–1 till the 11th cycle. BC also exhibited good cycle ability with a specific capacity of 356 mAh g–1 after 79 cycles at a current density of 0.5 C. This work proved to be an effective approach for boron-doped carbon nanostructures which has potential usage for lithium storage material.

scholarly journals Effect of spray drying treatment on the optical properties of Mg–Al spinel ceramics

Open Ceramics ◽  
2021 ◽  
Vol 6 ◽  
pp. 100102
Author(s):  
Robin Stocky ◽  
Judith Boehmler ◽  
Sébastien Lemonnier ◽  
Pierre Gibot ◽  
Yannick Lorgouilloux ◽  
...  
Keyword(s):  
Optical Properties ◽  
Spray Drying ◽  
Drying Treatment

Synthesis and Properties of SnO2 One-Dimensional Nanomaterials on Pt-Coated Substrates

2006 ◽  
Vol 517 ◽  
pp. 21-24
Author(s):  
Hyoun Woo Kim ◽  
S.H. Shim
Keyword(s):  
Electron Microscopy ◽  
Thermal Evaporation ◽  
Light Emission ◽  
Growth Mechanisms ◽  
X Ray Diffraction ◽  
Rutile Structure ◽  
One Dimensional ◽  
X Ray ◽  
Transmission Electron ◽  
Tetragonal Rutile Structure

We have synthesized the belt-like structures of tin oxide (SnO2) by carrying out the thermal evaporation of solid Sn powders. We have analyzed the samples with scanning electron microscopy, X-ray diffraction, transmission electron microscopy and photoluminescence (PL). The obtained nanobelts were single crystalline with a tetragonal rutile structure. PL spectrum exhibited the visible light emission. We have discussed the possible growth mechanisms.

scholarly journals Carbon nanotube-wrapped Fe2O3 anode with improved performance for lithium-ion batteries

2017 ◽  
Vol 8 ◽  
pp. 649-656 ◽  
Author(s):  
Guoliang Gao ◽  
Yan Jin ◽  
Qun Zeng ◽  
Deyu Wang ◽  
Cai Shen
Keyword(s):  
Hydrothermal Synthesis ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Practical Application ◽  
Lithium Storage ◽  
Improved Performance ◽  
A Current

Metall oxides have been proven to be potential candidates for the anode material of lithium-ion batteries (LIBs) because they offer high theoretical capacities, and are environmentally friendly and widely available. However, the low electronic conductivity and severe irreversible lithium storage have hindered a practical application. Herein, we employed ethanolamine as precursor to prepare Fe2O3/COOH-MWCNT composites through a simple hydrothermal synthesis. When these composites were used as electrode material in lithium-ion batteries, a reversible capacity of 711.2 mAh·g−1 at a current density of 500 mA·g−1 after 400 cycles was obtained. The result indicated that Fe2O3/COOH-MWCNT composite is a potential anode material for lithium-ion batteries.

Namomechanical Imaging and Nanoscale Elastic Modulus Measurements of SnO2 Nanobelts

2004 ◽  
Vol 821 ◽  
Author(s):  
Y. Zheng ◽  
R. E. Geer
Keyword(s):  
Contact Stiffness ◽  
Adhesive Properties ◽  
Rutile Structure ◽  
Force Microscopy ◽  
Lattice Constants ◽  
Transmission Electron ◽  
Reduced Modulus ◽  
Tetragonal Rutile Structure ◽  
Sno2 Nanobelts ◽  
Topographic Imaging

AbstractThe relative surface contact stiffness of SnO2 nanobelts has been investigated via ultrasonic force microscopy (UFM). The nanobelt crystal structure, as determined via transmission electron microscopy, was indexed to the tetragonal rutile structure (with lattice constants identical to those of bulk SnO2) as reported previously. The atomic Sn:O composition of the nanobelts studied was at or near 1:2. Topographic imaging studies revealed the nanobelt surface to be atomically flat with the exception of surface nanodots, assumed to be local SnO2 crystallites. Preliminary reduced modulus measurements were carried out via differential UFM on both the flat and nanodot regions of the nanobelt. Using the underlying Si substrate as a calibration standard the SnO2 modulus was estimated at 157±12 GPa, significantly lower than corresponding bulk values for any of the observed crystal orientations. We speculate this discrepancy is due in part to a combination of the aspherical probe tip and unknown adhesive properties of nanobelt. An intrinsic reduction of the SnO2 nanobelt modulus cannot be ruled out.

SPINEL Li2MTi3O8(M = Mg, Mg0.5Zn0.5) NANOWIRES WITH ENHANCED ELECTROCHEMICAL LITHIUM STORAGE

2011 ◽  
Vol 04 (01) ◽  
pp. 65-69 ◽  
Author(s):  
ZHENSHENG HONG ◽  
TONGBIN LAN ◽  
YONGZAN ZHENG ◽  
LILONG JIANG ◽  
MINGDENG WEI
Keyword(s):  
Solid State ◽  
Anode Materials ◽  
Electrochemical Impedance ◽  
Impedance Spectra ◽  
Li Ion Battery ◽  
Lithium Storage ◽  
Electrochemical Impedance Spectra ◽  
Titanate Nanowires ◽  
Li Ion ◽  
First Time

Spinel structural Li2MTi3O8 ( M = Mg, Mg0.5Zn0.5 ) nanowires have been successfully synthesized using titanate nanowires as a precursor and then have been used for the first time as anode materials in a rechargeable Li -ion battery. The cell composed of Li2MgTi3O8 nanowires exhibited a discharge capacity of 232 mAhg-1 at the second cycle, while only 159 mAhg-1 was obtained for the bulk prepared by a solid state reaction. The results of electrochemical impedance spectra indicate that spinel structural Li2MTi3O8 ( M = Mg, Mg0.5Zn0.5 ) nanowires can significantly reduce the charge transfer impedance, leading to enhanced capability of electrochemical lithium storage.

A systematic study on the synthesis of α-Fe2O3 multi-shelled hollow spheres

RSC Advances ◽  
2015 ◽  
Vol 5 (14) ◽  
pp. 10304-10309 ◽  
Author(s):  
Zahra Padashbarmchi ◽  
Amir Hossein Hamidian ◽  
Hongwei Zhang ◽  
Liang Zhou ◽  
Nematolah Khorasani ◽  
...  
Keyword(s):  
Spray Drying ◽  
Systematic Study ◽  
Hollow Spheres ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Drying Method ◽  
Lithium Storage ◽  
High Reversible Capacity

Well-defined α-Fe2O3 multi-shelled hollow spheres have been fabricated by a facile spray drying method. The resulting material exhibits high reversible capacity and good cycling performance in lithium storage.

scholarly journals One-step synthesis of novel mesoporous three-dimensional GeO2 and its lithium storage properties

2014 ◽  
Vol 2 (41) ◽  
pp. 17545-17550 ◽  
Author(s):  
Haiping Jia ◽  
Richard Kloepsch ◽  
Xin He ◽  
Juan Pablo Badillo ◽  
Martin Winter ◽  
...  
Keyword(s):  
Spray Drying ◽  
Synthesis Method ◽  
Three Dimensional ◽  
Drying Process ◽  
Lithium Storage ◽  
One Step ◽  
Storage Properties

Novel mesoporous three-dimensional GeO2 was successfully synthesized by a facile one-step synthesis method followed by mixing with graphene using a spray drying process.

scholarly journals Annealing Effect on Nanocrystalline SnO2 Thin Films Prepared by Spray Pyrolysis Technique

2021 ◽  
Vol 7 (3) ◽  
pp. 949-951
Author(s):  
K. Pakiyaraj ◽  
V. Kirthika
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis Technique ◽  
Transparent Conducting Oxide ◽  
Structural Features ◽  
Stoichiometric Ratio ◽  
Pure Sno2 ◽  
Rutile Structure ◽  
Tetragonal Rutile Structure ◽  
Semiconducting Metal Oxides ◽  
Sno2 Thin Films

In recent years, a transparent conducting oxide (TCO) SnO2 semiconductor have gained considerable attention due to their potential application in gas sensors. More number of studies on TCO oxide have focused on the semiconducting metal oxides in which an intensive argument is that the transparent semiconductors. The SnO2 thin films were deposited at 400 °C and then annealed at 500 °C and 600 °C and its structural, optical and electrical properties were characterized. The doping stoichiometric ratio was maintained as 4% and the resulting solution was sprayed on glass substrate which was kept at nozzle distance of 25 cm and the spray rate was 10 mL/min. The prepared pure SnO2 thin films have been characterized by different methods such as XRD, FESEM, UV-Vis NIR and EDAX analyses. It was found that the nanocrystalline SnO2 grains possesses structural features of the tetragonal rutile structure. Hence the prepared thin films are justified to be nanocrystalline and also the mean crystalline size decreased with respect to annealing temperature.

Vertically oriented Sn3O4 nanoflakes directly grown on carbon fiber cloth for high-performance lithium storage

2019 ◽  
Vol 6 (6) ◽  
pp. 1468-1474 ◽  
Author(s):  
Hongyun Jia ◽  
Xinxin Cao ◽  
Anqiang Pan ◽  
Linjun Huang ◽  
Bo Yin ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Electrochemical Performance ◽  
High Performance ◽  
Hydrothermal Reaction ◽  
Lithium Storage ◽  
Flexible Electrodes ◽  
Carbon Fiber Cloth

Flexible electrodes of vertically oriented Sn3O4 nanoflakes grown on carbon fiber cloth were synthesized by a hydrothermal reaction, exhibiting superior electrochemical performance.

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