scholarly journals Charge/discharge profiles of LiFePO4 repurposing batteries based on UL 1974

2020 ◽  
Author(s):  
Hsien-Ching Chung
Keyword(s):  
Large Scale ◽  
Small Scale ◽  
Li Ion Batteries ◽  
Test Procedures ◽  
Safety Certification ◽  
Li Ion ◽  
And Performance ◽  
Discharge Profile ◽  
Charge Discharge ◽  
Second Use

Owing to the popularization of electric vehicles worldwide and the development of renewable energy supply, the Li-ion batteries are widely used from small-scale personal mobile products to large-scale energy storage systems. Recently, the number of retired power batteries has largely increased, causing environmental protection threats and waste of resources. Since most of the retired power batteries still possess about 80% initial capacity, the second use of them becomes a possible route to solve the emergency problem. The safety and performance are important in using these second-use repurposing batteries. Underwriters Laboratories (UL), a global safety certification company, published the standard for evaluating the safety and performance of repurposing batteries, i.e., UL 1974. In this work, the test procedures are designed according to UL 1974 and the charge/discharge profile dataset of the LiFePO4 repurposing batteries provided. Researchers/engineers can use the characteristic curves in estimating the repurposing batteries under UL 1974. Furthermore, the profile dataset can be applied in the model-based engineering of repurposing batteries, e.g., fitting the variables of an empirical model or validating the results of a theoretical model.

Spinel LiMn2O4 Nanorods via Template–Engaged Method and as Cathode Materials for Li-Ion Batteries

2022 ◽  
Vol 905 ◽  
pp. 122-126
Author(s):  
Lin Li ◽  
Qing Liu ◽  
Jin Song Cheng ◽  
Rong Fei Zhao
Keyword(s):  
High Temperature ◽  
Rate Capability ◽  
Profile Measurement ◽  
Li Ion Batteries ◽  
Galvanostatic Charge ◽  
Temperature Performance ◽  
Li Ion ◽  
Discharge Profile ◽  
Superior Cycling Stability ◽  
Charge Discharge

Spinel LiMn2O4 nanorods were prepared by a hydrothermal method followed by solid-state lithiation. The produce β-MnO2 nanowire as template, and LiOH·H2O was used as lithium source. The spinel LiMn2O4 nanorods samples were characterized by SEM, XRD, (HR)TEM, and galvanostatic charge/discharge profile measurement. Compared with the LiMn2O4 nanoparticles, the LiMn2O4 nanorods showed superior cycling stability, better rate capability, good high temperature performance, and delivered a discharge capacity of 122 mAh/g (at 1 C, 100 cycles).

Metal film deposition on carbon anodes for high rate charge–discharge of Li–ion batteries

1999 ◽  
Vol 15 (3) ◽  
pp. 225-229 ◽  
Author(s):  
T. Takamura ◽  
J. Suzuki ◽  
C. Yamada ◽  
K. Sumiya ◽  
K. Sekine
Keyword(s):  
Metal Film ◽  
Film Deposition ◽  
High Rate ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Carbon Anodes ◽  
Charge Discharge

scholarly journals Impact of Surface Chemistry of Silicon Nanoparticles on the Structural and Electrochemical Properties of Si/Ni3.4Sn4 Composite Anode for Li-Ion Batteries

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 18
Author(s):  
Tahar Azib ◽  
Claire Thaury ◽  
Fermin Cuevas ◽  
Eric Leroy ◽  
Christian Jordy ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Electrochemical Properties ◽  
Large Scale ◽  
Silicon Nanoparticles ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Chemical Homogeneity ◽  
Electrochemical Behaviors ◽  
Pure Silicon ◽  
Li Ion

Embedding silicon nanoparticles in an intermetallic matrix is a promising strategy to produce remarkable bulk anode materials for lithium-ion (Li-ion) batteries with low potential, high electrochemical capacity and good cycling stability. These composite materials can be synthetized at a large scale using mechanical milling. However, for Si-Ni3Sn4 composites, milling also induces a chemical reaction between the two components leading to the formation of free Sn and NiSi2, which is detrimental to the performance of the electrode. To prevent this reaction, a modification of the surface chemistry of the silicon has been undertaken. Si nanoparticles coated with a surface layer of either carbon or oxide were used instead of pure silicon. The influence of the coating on the composition, (micro)structure and electrochemical properties of Si-Ni3Sn4 composites is studied and compared with that of pure Si. Si coating strongly reduces the reaction between Si and Ni3Sn4 during milling. Moreover, contrary to pure silicon, Si-coated composites have a plate-like morphology in which the surface-modified silicon particles are surrounded by a nanostructured, Ni3Sn4-based matrix leading to smooth potential profiles during electrochemical cycling. The chemical homogeneity of the matrix is more uniform for carbon-coated than for oxygen-coated silicon. As a consequence, different electrochemical behaviors are obtained depending on the surface chemistry, with better lithiation properties for the carbon-covered silicon able to deliver over 500 mAh/g for at least 400 cycles.

Development of small‐scale monitoring and modeling strategies for safe Li ion batteries

2021 ◽  
Author(s):  
Yawen Zhang ◽  
Tianyi Wang ◽  
Dawei Su ◽  
Chengyin Wang
Keyword(s):  
Small Scale ◽  
Li Ion Batteries ◽  
Li Ion

scholarly journals Lithium-Rich Cobalt-Free Manganese-Based Layered Cathode Materials for Li-Ion Batteries: Suppressing the Voltage Fading

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3487
Author(s):  
Ashraf Abdel-Ghany ◽  
Ahmed M. Hashem ◽  
Alain Mauger ◽  
Christian M. Julien
Keyword(s):  
Layered Structure ◽  
Performance Enhancement ◽  
Electrochemical Impedance ◽  
Discharge Process ◽  
High Porosity ◽  
Li Ion Batteries ◽  
Hydrothermal Route ◽  
Li Ion ◽  
Fading Rate ◽  
Charge Discharge

Lithium-rich layered oxides are recognized as promising materials for Li-ion batteries, owing to higher capacity than the currently available commercialized cathode, for their lower cost. However, their voltage decay and cycling instability during the charge/discharge process are problems that need to be solved before their practical application can be envisioned. These problems are mainly associated with a phase transition of the surface layer from the layered structure to the spinel structure. In this paper, we report the AlF3-coating of the Li-rich Co-free layered Li1.2Ni0.2Mn0.6O2 (LLNMO) oxide as an effective strategy to solve these problems. The samples were synthesized via the hydrothermal route that insures a very good crystallization in the layered structure, probed by XRD, energy-dispersive X-ray (EDX) spectroscopy, and Raman spectroscopy. The hydrothermally synthesized samples before and after AlF3 coating are well crystallized in the layered structure with particle sizes of about 180 nm (crystallites of ~65 nm), with high porosity (pore size 5 nm) determined by Brunauer–Emmett–Teller (BET) specific surface area method. Subsequent improvements in discharge capacity are obtained with a ~5-nm thick coating layer. AlF3-coated Li1.2Ni0.2Mn0.6O2 delivers a capacity of 248 mAh g−1 stable over the 100 cycles, and it exhibits a voltage fading rate of 1.40 mV per cycle. According to the analysis from galvanostatic charge-discharge and electrochemical impedance spectroscopy, the electrochemical performance enhancement is discussed and compared with literature data. Post-mortem analysis confirms that the AlF3 coating is a very efficient surface modification to improve the stability of the layered phase of the Li-rich material, at the origin of the significant improvement of the electrochemical properties.

Ternary Cu2SnS3 cabbage-like nanostructures: large-scale synthesis and their application in Li-ion batteries with superior reversible capacity

Nanoscale ◽  
2011 ◽  
Vol 3 (10) ◽  
pp. 4389 ◽  
Author(s):  
Baihua Qu ◽  
Hongxing Li ◽  
Ming Zhang ◽  
Lin Mei ◽  
Libao Chen ◽  
...  
Keyword(s):  
Large Scale ◽  
Reversible Capacity ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Large Scale Synthesis
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