scholarly journals Post-Mortem Analysis of Inhomogeneous Induced Pressure on Commercial Lithium-Ion Pouch Cells and Their Effects

2019 ◽  
Vol 11 (23) ◽  
pp. 6738 ◽  
Author(s):  
Georg Fuchs ◽  
Lisa Willenberg ◽  
Florian Ringbeck ◽  
Dirk Uwe Sauer
Keyword(s):  
Pressure Distribution ◽  
Lithium Ion Battery ◽  
Active Material ◽  
Lithium Ion ◽  
Post Mortem ◽  
Local Pressure ◽  
Active Materials ◽  
Steel Sphere ◽  
Passive Materials ◽  
Possible Cause

This work conducts a post-mortem analysis of a cycled commercial lithium-ion pouch cell under an induced inhomogeneous pressure by using a stainless-steel sphere as a force transmitter to induce an inhomogeneous pressure distribution on a cycled lithium-ion battery. After the cycling, a macroscopic and microscopic optical analysis of the active and passive materials was executed. Also, scanning electron microscopy was used to analyze active material particles. The sphere shape results in a heterogenic pressure distribution on the lithium-ion battery and induces a ring of locally high electrochemical activity, which leads to lithium plating. Furthermore, a surface layer found on the anode, which is a possible cause of electrolyte degradation at the particle–electrolyte interface. Significant deformation and destruction of particles by the local pressure was observed on the cathode. The analysis results validate previous simulations and theories regarding lithium plating on edge effects. These results show that pressure has a strong influence on electrolyte-soaked active materials.

scholarly journals Characterization of Flowing Aqueous Solid Dispersions of Electroactive Lithium-Ion Battery Materials

2019 ◽  
Author(s):  
Gary Koenig
Keyword(s):  
Quality Control ◽  
Lithium Ion Battery ◽  
Nickel Content ◽  
Active Material ◽  
Rate Capability ◽  
Lithium Ion ◽  
Active Materials ◽  
Aqueous Dispersions ◽  
Battery Materials

While there are many material characterization techniques that are employed for the quality control processes of lithium-ion battery active material powders, eventually the materials must be validated electrochemically in battery cells. This requires making the cells including slurry mixing, slurry coating and drying, electrode calendering and pairing, and final cell assembly. Fabricating cells requires significant equipment and material expense and, in some cases, significant time. Additionally, the cells must be electrochemically tested which depending on the protocol can take multiple days. A technique that provides insights into the electrochemical properties of battery materials without cell fabrication and electrochemical evaluation could improve battery active material powder quality control and potentially reduce the time and cost involved in material validation. Our lab has been working on a technique where dispersions of battery active materials are evaluated electrochemically during collisions with current collectors. The technique has been referred to as dispersed particle resistance (DPR), and in previous studies we have shown that DPR measurements provide an indicator of the rate capability of lithium-ion battery active materials. DPR has a significant advantage with regards to timescale for material evaluation because the method takes only a few minutes and has the option of high throughput analysis due to a flow-through configuration. We have also adapted the technique to characterization of the particles in aqueous dispersions, and in this presentation we will demonstrate that the technique is effective with aqueous dispersions of cathode materials, including water-sensitive layered metal oxides with high nickel content such as LiNi0.8Co0.1Mn0.1O2.

Quantifying Diffusion through Interfaces of Lithium-Ion Battery Active Materials

2020 ◽  
Vol 12 (14) ◽  
pp. 16243-16249 ◽  
Author(s):  
Peter Benedek ◽  
Ola K. Forslund ◽  
Elisabetta Nocerino ◽  
Nuri Yazdani ◽  
Nami Matsubara ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Active Materials

scholarly journals Charge and Discharge Behaviour of Li-Ion Batteries at Various Temperatures Containing LiCoO2 Nanostructured Cathode Produced by CCSO

2015 ◽  
Vol 15 (4) ◽  
pp. 301 ◽  
Author(s):  
Y.Y. Mamyrbayeva ◽  
R.E. Beissenov ◽  
M.A. Hobosyan ◽  
S.E. Kumekov ◽  
K.S. Martirosyan
Keyword(s):  
Lithium Ion Battery ◽  
Active Material ◽  
Lithium Ion ◽  
Synthetic Approach ◽  
Capacity Fade ◽  
Li Ion Batteries ◽  
Material Loss ◽  
Method Performance ◽  
Battery Capacity ◽  
Li Ion

<p>There are technical barriers for penetration market requesting rechargeable lithium-ion battery packs for portable devices that operate in extreme hot and cold environments. Many portable electronics are used in very cold (-40 °C) environments, and many medical devices need batteries that operate at high temperatures. Conventional Li-ion batteries start to suffer as the temperature drops below 0 °C and the internal impedance of the battery  increases. Battery capacity also reduced during the higher/lower temperatures. The present work describes the laboratory made lithium ion battery behaviour features at different operation temperatures. The pouch-type battery was prepared by exploiting LiCoO<sub>2</sub> cathode material synthesized by novel synthetic approach referred as Carbon Combustion Synthesis of Oxides (CCSO). The main goal of this paper focuses on evaluation of the efficiency of positive electrode produced by CCSO method. Performance studies of battery showed that the capacity fade of pouch type battery increases with increase in temperature. The experimental results demonstrate the dramatic effects on cell self-heating upon electrochemical performance. The study involves an extensive analysis of discharge and charge characteristics of battery at each temperature following 30 cycles. After 10 cycles, the battery cycled at RT and 45 °C showed, the capacity fade of 20% and 25% respectively. The discharge capacity for the battery cycled at 25 °C was found to be higher when compared with the battery cycled at 0 °C and 45 °C. The capacity of the battery also decreases when cycling at low temperatures. It was important time to charge the battery was only 2.5 hours to obtain identical nominal capacity under the charging protocol. The decrease capability of battery cycled at high temperature can be explained with secondary active material loss dominating the other losses.</p>

Extended Physics-Based Reduced-Order Capacity Fade Model for Lithium Ion Battery Cells

2021 ◽  
pp. 1-12
Author(s):  
Zachary Salyer ◽  
Matilde D'Arpino ◽  
Marcello Canova
Keyword(s):  
Lithium Ion Battery ◽  
Cell Model ◽  
Active Material ◽  
Lithium Ion ◽  
Calibration Procedure ◽  
Layer Growth ◽  
Operating Conditions ◽  
Capacity Fade ◽  
Computationally Efficient ◽  
Reduced Order

Abstract Aging models are necessary to accurately predict the SOH evolution in lithium ion battery systems when performing durability studies under realistic operatings, specifically considering time-varying storage, cycling, and environmental conditions, while being computationally efficient. This paper extends existing physics-based reduced-order capacity fade models that predict degradation resulting from the solid electrolyte interface (SEI) layer growth and loss of active material (LAM) in the graphite anode. Specifically, the physics of the degradation mechanisms and aging campaigns for various cell chemistries are reviewed to improve the model fidelity. Additionally, a new calibration procedure is established relying solely on capacity fade data and results are presented including extrapolation/validation for multiple chemistries. Finally, a condition is integrated to predict the onset of lithium plating. This allows the complete cell model to predict the incremental degradation under various operating conditions, including fast charging.

Reactive Oligomer Coating Cathode Active Materials (LiNi0.6Co0.2Mn0.2O2) for Improved Lithium-Ion Battery Performance and Safety

2021 ◽  
Vol MA2021-01 (5) ◽  
pp. 302-302
Author(s):  
National Taiwan University of Technology ◽  
Anh Ngoc Tram Mai ◽  
Chorng-Shyan Chern
Keyword(s):  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Active Materials ◽  
Reactive Oligomer

scholarly journals Lithium and transition metal dissolution due to aqueous processing in lithium-ion battery cathode active materials

2020 ◽  
Vol 466 ◽  
pp. 228315 ◽  
Author(s):  
W. Blake Hawley ◽  
Anand Parejiya ◽  
Yaocai Bai ◽  
Harry M. Meyer ◽  
David L. Wood ◽  
...  
Keyword(s):  
Transition Metal ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Metal Dissolution ◽  
Aqueous Processing ◽  
Active Materials

scholarly journals Theoretical simulation of the optimal relation between active material, binder and conductive additive for lithium-ion battery cathodes

Energy ◽  
2019 ◽  
Vol 172 ◽  
pp. 68-78 ◽  
Author(s):  
D. Miranda ◽  
A. Gören ◽  
C.M. Costa ◽  
M.M. Silva ◽  
A.M. Almeida ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Active Material ◽  
Lithium Ion ◽  
Theoretical Simulation ◽  
Conductive Additive
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