scholarly journals Increasing the Discharge Rate Capability of Lithium-Ion Cells with Laser-Structured Graphite Anodes: Modeling and Simulation

2018 ◽  
Vol 165 (7) ◽  
pp. A1563-A1573 ◽  
Author(s):  
Jan B. Habedank ◽  
Ludwig Kraft ◽  
Alexander Rheinfeld ◽  
Christina Krezdorn ◽  
Andreas Jossen ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Lithium Ion Cells ◽  
Graphite Anodes

Rate Capability Fade of 18650 Li-Ion Cells

2008 ◽  
Vol 368-372 ◽  
pp. 290-292
Author(s):  
Fang Lian ◽  
Yan Li ◽  
Yang Hu ◽  
Sheng Wen Zhong ◽  
Li Hua Xu ◽  
...  
Keyword(s):  
High Current Density ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cubic Crystal ◽  
Lithium Ion Cells ◽  
Positive Electrode Material ◽  
Anode Electrode ◽  
Li Ion

The rate capability of 18650 lithium-ion cells was studied in the paper. The experimental results showed that the reversible capacity declined to 89.5, 85.8 and 81.2% of the initial capacity after 300 cycles at discharge rate of 0.5, 1 and 2C, respectively. The XRD and SAED analysis indicated that at a high current density partial positive electrode material LiCoO2 transformed gradually from well-layered structure to rock salt cubic crystal. Upon the cycling, the degradation of cathode materials’ structure and much thicker negative film on anode electrode surface contributed to the rate capability fade.

Electrochemical characterization of bi-layered graphite anodes combining high and low porosity in lithium-ion cells to improve cell performance

2021 ◽  
pp. 138966
Author(s):  
Daniel Müller ◽  
Imanol Landa-Medrano ◽  
Aitor Eguia-Barrio ◽  
Iker Boyano ◽  
Idoia Urdampilleta ◽  
...  
Keyword(s):  
Lithium Ion ◽  
Electrochemical Characterization ◽  
Cell Performance ◽  
Lithium Ion Cells ◽  
Graphite Anodes ◽  
Low Porosity

scholarly journals High Discharge Rate Lithium Ion Batteries with the Composite Cathode of LiFePO4/Mesocarbon Nanobead

2010 ◽  
Vol 177 ◽  
pp. 208-210
Author(s):  
Yi Jie Gu ◽  
Cui Song Zeng ◽  
Yu Bo Chen ◽  
Hui Kang Wu ◽  
Hong Quan Liu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Room Temperature ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Composite Cathode ◽  
Rate Performance ◽  
High Discharge ◽  
High Discharge Rate ◽  
Lifepo4 Cathode

Olivine compounds LiFePO4 were prepared by the solid state reaction, and the electrochemical properties were studied with the composite cathode of LiFePO4/mesocarbon nanobead. High discharge rate performance can be achieved with the designed composite cathode of LiFePO4/mesocarbon nanobead. According to the experiment results, batteries with the composite cathode deliver discharge capacity of 1087mAh for 18650 type cell at 20C discharge rate at room temperature. The analysis shows that the uniformity of mesocarbon nanobead around LiFePO4 can supply enough change for electron transporting, which can enhance the rate capability for LiFePO4 cathode lithium ion batteries. It is confirmed that lithium ion batteries with LiFePO4 as cathode are suitable to electric vehicle application.

scholarly journals Stretchable batteries with gradient multilayer conductors

2019 ◽  
Vol 5 (7) ◽  
pp. eaaw1879 ◽  
Author(s):  
Minsu Gu ◽  
Woo-Jin Song ◽  
Jaehyung Hong ◽  
Sung Youb Kim ◽  
Tae Joo Shin ◽  
...  
Keyword(s):  
Self Assembly ◽  
Multiple Scales ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Charge Storage ◽  
Storage Devices ◽  
Essential Components ◽  
Stretchable Conductors ◽  
A Charge

Stretchable conductors are essential components in next-generation deformable and wearable electronic devices. The ability of stretchable conductors to achieve sufficient electrical conductivity, however, remains limited under high strain, which is particularly detrimental for charge storage devices. In this study, we present stretchable conductors made from multiple layers of gradient assembled polyurethane (GAP) comprising gold nanoparticles capable of self-assembly under strain. Stratified layering affords control over the composite internal architecture at multiple scales, leading to metallic conductivity in both the lateral and transversal directions under strains of as high as 300%. The unique combination of the electrical and mechanical properties of GAP electrodes enables the development of a stretchable lithium-ion battery with a charge-discharge rate capability of 100 mAh g−1 at a current density of 0.5 A g−1 and remarkable cycle retention of 96% after 1000 cycles. The hierarchical GAP nanocomposites afford rapid fabrication of advanced charge storage devices.

scholarly journals Complexing Agents on Carbon Content and Lithium Storage Capacity of LiFePO4/C Cathode Synthesized via Sol-Gel Approach

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
C. Guan ◽  
H. Huang
Keyword(s):  
Discharge Rate ◽  
Sol Gel ◽  
Electronic Conductivity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cost Effective ◽  
Reversible Capacity ◽  
Complexing Agents ◽  
Lithium Storage ◽  
Synthesis Conditions

Olivine-structured LiFePO4faces its intrinsic challenges in terms of poor electrical conductivity and lithium-ion diffusion capability for application to lithium-ion batteries. Cost-effective sol-gel approach is advantageous to in situ synthesize carbon-coated LiFePO4(LiFePO4/C) which can not only improve electronic conductivity but also constrain particle size to nanometer scale. In this study, the key parameter is focused on the choice and amount of chelating agents in this synthesis route. It was found that stability of complexing compounds has significant impacts on the carbon contents and electrochemical properties of the products. At the favorable choice of precursors, composition, and synthesis conditions, nanocrystalline LiFePO4/C materials with appropriate amount of carbon coating were successfully obtained. A reversible capacity of 162 mAh/g was achieved at 0.2Crate, in addition to good discharge rate capability.

Quasi-Isothermal External Short Circuit Tests Applied to Lithium-Ion Cells: Part II. Modeling and Simulation

2019 ◽  
Vol 166 (2) ◽  
pp. A151-A177 ◽  
Author(s):  
Alexander Rheinfeld ◽  
Johannes Sturm ◽  
Andreas Noel ◽  
Jörn Wilhelm ◽  
Akos Kriston ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Short Circuit ◽  
Lithium Ion ◽  
Lithium Ion Cells

Material Requirements for Lithium-Ion Batteries

1995 ◽  
Vol 393 ◽  
Author(s):  
Like Xie ◽  
David Fouchard ◽  
Sid Megahed
Keyword(s):  
Energy Density ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cellular Phones ◽  
Lithium Electrode ◽  
Lithium Ion Cells ◽  
Oxide Cathodes ◽  
Lithium Metal Anodes ◽  
Carbon Anodes ◽  
Modest Reduction

ABSTRACTLithium-ion (or ‘rocking-chair’) batteries with lithiated oxide cathodes and carbon anodes are finding increasing acceptance in many electronic applications including low rates (e.g., memory backup, real time clock, bridge function) and high rates (e.g., laptop computers, cellular phones, camcorders, etc.). This technology offers significant improvements in safety relative to cells using lithium metal anodes, with only a modest reduction in energy density. In general, materials for lithium-ion cells are chosen to minimize the energy density penalties associated with replacing the lithium electrode with an intercalation electrode. In this review paper, we describe the properties of the cathode, anode and electrolyte, and discuss requirements for improved materials for advanced lithium-ion systems. Consideration is given to energy density, rate capability, cycleability and thermal stability.

Sign in / Sign up

Export Citation Format

Share Document