Mesoporous Tin Phosphate as Anode Material for Lithium-Ion Cells

2012 ◽  
Vol 545 ◽  
pp. 175-181 ◽  
Author(s):  
Mohammad Azmi Bustam ◽  
Siti Munirah Hasanaly ◽  
Zakaria Man
Keyword(s):  
Discharge Capacity ◽  
Sodium Dodecyl ◽  
High Capacity ◽  
Lithium Ion ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Templating Method ◽  
Lithium Ion Cells ◽  
Irreversible Reduction ◽  
Surfactant Templating

Mesoporous SnP2O7was synthesized via a surfactant templating method where an anionic surfactant, sodium dodecyl sulfate was used. X-ray diffraction (XRD) analysis indicates presence of mesostructure when the precursors were calcined at 200, 300 and 400 °C. Cyclic voltammetry tests carried out within 0-2.0 V (vs. Li/Li+) indicated that irreversible reduction of tin phosphate to form lithium phosphate phases and metallic tin occurred around 1.10 V and 0.69 V whereas the reversible alloying and de-alloying reaction involving lithium with tin occurred at 0.19 V and 0.52 V, respectively. Galvanostatic charge-discharge cycling tests carried out within 0-1.2V (vs. Li/Li+) showed that the mesoporous tin phosphate calcined at 400 °C exhibited a reversible discharge capacity of 738 mAh/g in the second cycle and upon reaching the tenth cycle, it retained a discharge capacity of 461 mAh/g. The relatively high capacity obtained for this anode was attributed to the mesoporous framework which provided larger surface area for reaction with lithium and minimized effect of volume changes experienced by the anode during repeated charging and discharging cycling.

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.

Pulsed sonication for alumina coatings on high-capacity oxides: Performance in lithium-ion cells

2014 ◽  
Vol 258 ◽  
pp. 46-53 ◽  
Author(s):  
Vilas G. Pol ◽  
Yan Li ◽  
Fulya Dogan ◽  
Ethan Secor ◽  
Michael M. Thackeray ◽  
...  
Keyword(s):  
High Capacity ◽  
Lithium Ion ◽  
Alumina Coatings ◽  
Lithium Ion Cells

scholarly journals High Capacity Nano-Sized Carbon Spheres for Lithium-Ion Battery Anode Materials

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 645 ◽  
Author(s):  
Youliang Wang ◽  
Guoyun Yu ◽  
Xiujuan Chen ◽  
Ansong Wang
Keyword(s):  
Electron Microscope ◽  
Discharge Capacity ◽  
Anode Materials ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Average Diameter ◽  
Synthesis Temperature ◽  
Ammonium Bromide ◽  
Carbon Spheres

A one-step hydrothermal method is reported for synthesizing carbon spheres (Cs) with sucrose as the carbon resource for the anode materials in lithium-ion batteries (LIBs). Firstly, the influences of synthesis temperature and time on particle size and the morphology of the Cs were researched. Then, modified carbon spheres (MCs) were synthesized with some surfactants, such as hexadecyl trimethyl ammonium bromide (CTAB) and polyvinyl alcohol (PVA). Finally, nano-sized MCs with an average diameter of 70 nm, owning the smooth surface and uniform spherical morphology systematically investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM). The outstanding performances of nano-sized MCs synthesized with PVA were demonstrated as anode materials in LIBs. The higher initial discharge capacity of 1180 mAhg−1 and the excellent discharge capacity of 470 mAhg−1 were obtained respectively at 100 mAg−1 (0.27 C) over 50 cycles. The nano-sized MCs has also shown remarkable performance of rate capability of 284.6 mAhg−1 at 1.5 C. In addition, the cycling reversibility of the nano-sized MCs is more stable than that of the sub-micron sized MCs modified with CTAB and no surfactant respectively.

Investigation on Thermal Runaway of Li-Ion Cells Based on LiNi1/3Mn1/3Co1/3O2

2020 ◽  
Vol 18 (3) ◽  
Author(s):  
Xiaoyi Xie ◽  
Dongsheng Ren ◽  
Li Wang ◽  
Xuning Feng ◽  
Xiangming He
Keyword(s):  
Electric Vehicles ◽  
Safety Management ◽  
Lithium Ion ◽  
Thermal Runaway ◽  
Onset Temperature ◽  
Ex Situ ◽  
X Ray Diffraction ◽  
Self Heating ◽  
Lithium Ion Cells ◽  
Endothermic Reactions

Abstract The thermal runaway behavior of lithium-ion cells plays a crucial role in the safety management of the powertrain in electric vehicles. In this study, the effect of states of charge (SOC) on the thermal runaway behavior of commercial LiNi1/3Mn1/3Co1/3O2 (NMC)-based pouch cells is investigated using accelerating rate calorimetry (ARC) and ex-situ X-ray diffraction. By studying the differences in the onset temperature of self-heating (T1) and the onset temperature of thermal runaway (T2) along with the mass loss between the different SOCs, we observed that higher SOC led to a decrease in the T2. However, T1 initially increased and then decreased with increasing SOC. These trends were attributed to the phase change of cathode material and separator. The ARC results also indicated the occurrence of endothermic reactions during the self-heating accumulation period. The findings in this study are helpful for thermal safety management of battery powertrain for electric vehicles.

scholarly journals Lithium ion cells using a new high capacity cathode

2001 ◽  
Vol 97-98 ◽  
pp. 711-713 ◽  
Author(s):  
Y. Grincourt ◽  
C. Storey ◽  
I.J. Davidson
Keyword(s):  
High Capacity ◽  
Lithium Ion ◽  
Lithium Ion Cells

Synthesis and Performance of LiCo1/3Mn1/3Ni1/3O2 Cathode Material for Lithium-Ion Battery

2011 ◽  
Vol 399-401 ◽  
pp. 1491-1495
Author(s):  
Huan Liu ◽  
Yao Chun Yao ◽  
Yong Mei Li ◽  
Hui Hua Yi ◽  
Yong Nian Dai
Keyword(s):  
Electrochemical Performance ◽  
Cathode Material ◽  
Discharge Capacity ◽  
Raw Materials ◽  
Lithium Ion ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
Excellent Electrochemical Performance ◽  
And Performance ◽  
Xrd Patterns

The layered cathode material for Li-ion batteries was synthesized by mechanical activation-high temperature solid state method. XRD and electrochemical measurements were used to characterize the structure and electrochemical performance of the product. The X-ray diffraction (XRD) patterns reveal that the material is crystallized to layered a-NaFeO2structure. The cathode material with excellent electrochemical performance was obtained by sintering the mixed raw materials with n (Li)/n (M) =1.11. The initial discharge capacity was 128mAh/g at a current density of 20mA/g between 2.7-4.2V and the discharge capacity retention was 96% after 50 cycles.

scholarly journals Spatially Resolved Operando Synchrotron-Based X-Ray Diffraction Measurements of Ni-Rich Cathodes for Li-Ion Batteries

2022 ◽  
Vol 3 ◽  
Author(s):  
Andrew Stephen Leach ◽  
Alice V. Llewellyn ◽  
Chao Xu ◽  
Chun Tan ◽  
Thomas M. M. Heenan ◽  
...  
Keyword(s):  
High Capacity ◽  
Lithium Ion ◽  
Lower Percentage ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spatially Resolved ◽  
Electrochemical Cycling ◽  
Li Ion

Understanding the performance of commercially relevant cathode materials for lithium-ion (Li-ion) batteries is vital to realize the potential of high-capacity materials for automotive applications. Of particular interest is the spatial variation of crystallographic behavior across (what can be) highly inhomogeneous electrodes. In this work, a high-resolution X-ray diffraction technique was used to obtain operando transmission measurements of Li-ion pouch cells to measure the spatial variances in the cell during electrochemical cycling. Through spatially resolved investigations of the crystallographic structures, the distribution of states of charge has been elucidated. A larger portion of the charging is accounted for by the central parts, with the edges and corners delithiating to a lesser extent for a given average electrode voltage. The cells were cycled to different upper cutoff voltages (4.2 and 4.3 V vs. graphite) and C-rates (0.5, 1, and 3C) to study the effect on the structure of the NMC811 cathode. By combining this rapid data collection method with a detailed Rietveld refinement of degraded NMC811, the spatial dependence of the degradation caused by long-term cycling (900 cycles) has also been shown. The variance shown in the pristine measurements is exaggerated in the aged cells with the edges and corners offering an even lower percentage of the charge. Measurements collected at the very edge of the cell have also highlighted the importance of electrode alignment, with a misalignment of less than 0.5 mm leading to significantly reduced electrochemical activity in that area.

Li Storage Properties of Ag and SnO 2 Nanopowders Synthesized from Reverse Micelles

2005 ◽  
Vol 26 ◽  
pp. 1-7 ◽  
Author(s):  
Jung Ho Ahn ◽  
Yong Jin Kim ◽  
G.X. Wang ◽  
H.K. Liu
Keyword(s):  
Discharge Capacity ◽  
Reverse Micelle ◽  
Reverse Micelles ◽  
Lithium Ion ◽  
Lithium Ion Cells ◽  
Metallic Salts ◽  
Anode Electrode ◽  
Storage Properties ◽  
Li Storage

Ag and SnO2 nanopowders were synthesized by reverse-micelle method. The reverse micelles were prepared to form tiny aqueous droplets dispersed in oil-based solvents. Two reverse micelles containing metallic salts and reductive agents were rigorously mixed to form nanoparticles inside aqueous droplets by a reductive reaction. The spherical powders of 20~50 nm were formed during the process. The resulting Ag and SnO2 nanopowders were examined as the anode electrode for lithium-ion cells. The reversible discharge capacity of the Ag and SnO2 nanopowders after 25 cycles were 315 and 380 mAh/g, respectively.

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