Preparation, Characterization and Electrochemical Property of ZnCl2-doped Carbon Nanometer Material as the Anode of Lithium-ion Battery

2004 ◽  
Vol 822 ◽  
Author(s):  
D.F. Zhou ◽  
Y.L. Zhao ◽  
Y.G. Chen ◽  
X.Y. Zhang ◽  
R.S. Wang
Keyword(s):  
Lithium Ion Battery ◽  
Phenolic Resin ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Nanometer Material ◽  
Average Size ◽  
Charge Discharge

AbstractPhenolic resin-based nanoscopic carbonaceous materials have been prepared by doping different proportions of ZnCl2 into phenolic resin (PR) precursor at various heat-treatment temperatures and characterized by means of Brunner-Emmett-Teller method (BET), X-ray diffraction (XRD), transmission electron microscopy (TEM) and Raman spectroscopy analyses. The results show that as the ratio of PR to ZnCl2 is 1:3, the average size of grains and apertures are about from 40 to 60 nm and 3.86 nm, respectively, reaching nanometer level. When this material is used as electrode material of lithium ion battery, the reversible capacity the battery could be kept at 370 mA•h•g−1 after 10 charge/discharge cycles.

The Sn Nano-Particles Coated on MCMB as Anodes Material for Lithium Ion Battery

2012 ◽  
Vol 622-623 ◽  
pp. 1000-1005
Author(s):  
Min Jen Deng ◽  
Du Cheng Tsai ◽  
Wen Hsien Ho ◽  
Hui Nien Li ◽  
Ching Fei Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Current Collector ◽  
Reversible Capacity ◽  
Nano Particles ◽  
Cycle Performance ◽  
Electro Deposition ◽  
Transmission Electron ◽  
Charge Discharge

Sn nano particle coatings on MCMB powder, as anodes of lithium ion battery are carried out in SnSO4solutions by using cathodic electrochemical synthesis and subsequently dried at 100°C. The electro-deposition reaction was follow: Sn2++ H2O ↔ SnOH+aq+ H+; SnOH+aq↔ SnOH+aqs + e-; SnOH+ads + e- → SnOH; SnOH + H+ + e- → Sn + H2O. The Sn-coated MCMB specimens are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), and charge/discharge tests. The nano-sized Sn particles coated on MCMB powder are obtained in 0.2M SnSO4solutions and desoition current 0.5A. An important parameter in electrode preparation is the adhesion of the coating to the current collector, which greatly affects the cyclability of the electrode. Therefore, the relationship between adhesion strength and cycle performance was investigate in this study. Charge/discharge cycle tests elucidated that Sn-coated MCMB showed higher capacity than MCMB. Compared with MCMB, the second discharge capacity of Sn–coated MCMB increased about 28.8%. After 50 cycles, the reversible capacity was about 339.6 mAhg-1. The capacity retention ratio C25/C2 was about 80.87%. It was shown good cycle life due to the nano-particles effects retarded to Sn aggregation.

Large Reversible Capacity of Graphene Electrodes Used in Lithium-Ion Batteries

2013 ◽  
Vol 320 ◽  
pp. 114-118
Author(s):  
Li Zhong Bai ◽  
Dong Lin Zhao ◽  
Ji Ming Zhang ◽  
Feng Li
Keyword(s):  
Electron Microscope ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
X Ray Diffraction ◽  
Natural Graphite ◽  
X Ray ◽  
Transmission Electron ◽  
Ft Ir ◽  
Ir And Raman ◽  
A Current

High quality graphene sheets (GSs) were prepared from natural graphite by oxidation, rapid thermal expansion and ultrasonic treatment. The morphology and structure of GSs were systematically investigated by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier tansform infrared spectroscopy (FT-IR) and Raman spectroscopy. It was found that the GSs electrode used in lithium-ion battery (LIB) exhibited a relatively high reversible capacity of 902 mA h/g at a current density of 50 mA/g. After 50 cycles, the reversible capacity was still kept at 734 mA h/g.

scholarly journals SnO2/PANI nanocomposite electrodes for supercapacitors and lithium ion batteries

2018 ◽  
Vol 4 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Venkata S. Reddy Channu ◽  
B. Rambabu ◽  
Kusum Kumari ◽  
Rajmohan R. Kalluru ◽  
Rudolf Holze
Keyword(s):  
Lithium Ion Battery ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Solution Route ◽  
Nanocomposite Electrodes

Abstract Tin oxide (SnO2) nanostructures and SnO2/Polyaniline (PANI) nanocomposites to be used as electrode materials for a lithium ion battery were synthesized using a solution-route technique with chelating agents followed by calcination at 300∘C for 4 h. Structural and morphological properties were studied with powder X-ray diffraction, scanning electron and transmission electron microscopy. Particles of 25-10 nm size are observed in the microscope images. TGA results showed that the PANI-modified SnO2 nanoparticles exhibit higher thermal stability than the SnO2 nanoparticles. Electrochemical properties of SnO2 and SnO2/PANI electrodes were examined in a lithium ion battery and a supercapacitor. The electrode of SnO2/PANI shows higher specific capacity. The cell with SnO2/PANI exhibits a specific capacity of 1450 mAh/g at C/10. Supercapacitor results indicate that the PANI-modified SnO2 composite had a higher current with apparent cathodic and anodic peaks.

Ball-Milled Graphite-Tin Composite Anode Materials for Lithium-Ion Battery

2012 ◽  
Vol 736 ◽  
pp. 127-132
Author(s):  
Kuldeep Rana ◽  
Anjan Sil ◽  
Subrata Ray
Keyword(s):  
Lithium Ion Battery ◽  
Anode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Composite Anode ◽  
X Ray Diffraction ◽  
Promising Alternative ◽  
X Ray ◽  
Initial Discharge ◽  
Lithium Ion Cell

Lithium alloying compounds as an anode materials have been a focused for high capacity lithium ion battery due to their highenergy capacity and safety characteristics. Here we report on the preparation of graphite-tin composite by using ball-milling in liquid media. The composite material has been characterized by scanning electron microscope, energy depressive X-ray spectroscopy, X-ray diffraction and Raman spectra. The lithium-ion cell made from graphite-tin composite presented initial discharge capacity of 1065 mAh/g and charge capacity 538 mAh/g, which becomes 528 mAh/g in the second cycle. The composite of graphite-tin with higher capacity compared to pristine graphite is a promising alternative anode material for lithium-ion battery.

Synthesis and Electrochemical Properties of a LiNi0.7Co0.3O1.9Cl0.1 Cathode Material for Lithium-Ion Battery

2007 ◽  
Vol 336-338 ◽  
pp. 463-465 ◽  
Author(s):  
Xin Lu Li ◽  
Fei Yu Kang ◽  
Yong Ping Zheng ◽  
Xiu Juan Shi ◽  
Wan Ci Shen
Keyword(s):  
Hexagonal Lattice ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Constant Current ◽  
Cyclic Voltammograms ◽  
X Ray Diffraction ◽  
X Ray ◽  
Constant Current Charge ◽  
Initial Cycle ◽  
Partial Oxygen

Partial oxygen in LiNi0.7Co0.3O2 was replaced by chlorine to form LiNi0.7Co0.3O1.9Cl0.1. Phase structure of LiNi0.7Co0.3O1.9Cl0.1 was identified as a pure hexagonal lattice of α-NaFeO2 type by X-ray diffraction. Discharge capacity of LiNi0.7Co0.3O1.9Cl0.1 was 202 mAh/g in initial cycle at 15 mA/g current density in 2.5- 4.3 V potential window. The constant current charge/discharge experiments and cyclic voltammograms showed that chlorine addition was effective to improve reversible capacity and cycle stability of LiNi0.7Co0.3O2.

scholarly journals Making and Characterization of Limnpo4 Using Solid State Reaction Method for Lithium Ion Battery Cathodes

2019 ◽  
pp. 583-588
Author(s):  
Adelyna Oktavia ◽  
Kurnia Sembiring ◽  
Slamet Priyono
Keyword(s):  
Solid State ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Solid State Reaction Method ◽  
Raw Material ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
X Ray ◽  
General Investigation

Hospho-material of olivine, LiMnPO4 identified as promising for cathode material generation next Lithium-ion battery and has been successfully synthesized by solid-state method with Li2Co3, 2MnO2, 2NH4H2PO4 as raw material. The influence of initial concentration of precursors at kalsinasi temperatures (400-800 ° C) flows with nitrogen. The purity and composition phase verified by x-ray diffraction analysis (XRD), scanning electron microscopy (SEM), spectroscopy, energy Dispersive x-ray Analysis (EDS), Raman spectra. General investigation shows that there is a correlation between the concentration of precursors, the temperature and the temperature of sintering kalsinasi that can be exploited to design lithium-ion next generation.

scholarly journals Formation of ZnO/Zn0.5Cd0.5Se Alloy Quantum Dots in the Presence of High Oleylamine Contents

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 999
Author(s):  
Yi-An Chen ◽  
Kuo-Hsien Chou ◽  
Yi-Yang Kuo ◽  
Cheng-Ye Wu ◽  
Po-Wen Hsiao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Quantum Dots ◽  
Particle Size ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
Transmission Electron ◽  
Average Size ◽  
Alloy Quantum Dots ◽  
First Time

To the best of our knowledge, this report presents, for the first time, the schematic of the possible chemical reaction for a one-pot synthesis of Zn0.5Cd0.5Se alloy quantum dots (QDs) in the presence of low/high oleylamine (OLA) contents. For high OLA contents, high-resolution transmission electron microscopy (HRTEM) results showed that the average size of Zn0.5Cd0.5Se increases significantly from 4 to 9 nm with an increasing OLA content from 4 to 10 mL. First, [Zn(OAc)2]–OLA complex can be formed by a reaction between Zn(OAc)2 and OLA. Then, Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) data confirmed that ZnO is formed by thermal decomposition of the [Zn(OAc)2]–OLA complex. The results indicated that ZnO grew on the Zn0.5Cd0.5Se surface, thus increasing the particle size. For low OLA contents, HRTEM images were used to estimate the average sizes of the Zn0.5Cd0.5Se alloy QDs, which were approximately 8, 6, and 4 nm with OLA loadings of 0, 2, and 4 mL, respectively. We found that Zn(OAc)2 and OLA could form a [Zn(OAc)2]–OLA complex, which inhibited the growth of the Zn0.5Cd0.5Se alloy QDs, due to the decreasing reaction between Zn(oleic acid)2 and Se2−, which led to a decrease in particle size.

scholarly journals A facile synthesis of a carbon-encapsulated Fe3O4 nanocomposite and its performance as anode in lithium-ion batteries

2013 ◽  
Vol 4 ◽  
pp. 699-704 ◽  
Author(s):  
Raju Prakash ◽  
Katharina Fanselau ◽  
Shuhua Ren ◽  
Tapan Kumar Mandal ◽  
Christian Kübel ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Lithium Ion ◽  
Iron Pentacarbonyl ◽  
X Ray Diffraction ◽  
Facile Synthesis ◽  
X Ray ◽  
Transmission Electron ◽  
Lithium Ion Cell ◽  
Carbon Framework ◽  
One Step

A carbon-encapsulated Fe3O4 nanocomposite was prepared by a simple one-step pyrolysis of iron pentacarbonyl without using any templates, solvents or surfactants. The structure and morphology of the nanocomposite was investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Brunauer–Emmett–Teller analysis and Raman spectroscopy. Fe3O4 nanoparticles are dispersed intimately in a carbon framework. The nanocomposite exhibits well constructed core–shell and nanotube structures, with Fe3O4 cores and graphitic shells/tubes. The as-synthesized material could be used directly as anode in a lithium-ion cell and demonstrated a stable capacity, and good cyclic and rate performances.

Synthesis and Characterization of Cu2FeSnS4 Semiconductor Nanocrystals with Zincblende Structure

2012 ◽  
Vol 512-515 ◽  
pp. 2019-2022 ◽  
Author(s):  
Xiao Lu Liang ◽  
Xian Hua Wei
Keyword(s):  
Random Distribution ◽  
Semiconductor Nanocrystals ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Nir Absorption ◽  
Average Size

Cu2FeSnS4semiconductor nanocrystals with zincblende structure have been successfully synthesized by a hot-injection approach. Cu+, Fe2+, and Sn4+cations have a random distribution in the zincblende unit cell, and the occupancy possibilities are 1/2, 1/4 and 1/4, respectively. Those nanocrystals were characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), energy dispersive spectroscopy (EDS), and UV-Vis-NIR absorption spectroscopy. The Cu2FeSnS4 nanocrystals have an average size of 7.5 nm and a band gap of 0.92 eV.

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