Analysis of Charge/Discharge Behavior of Lithium-Ion Cells Using Simple and High-Precision Capacity Measurements: Relation between Capacity Degradation Rate and Coulombic Efficiency

2019 ◽  
Vol 166 (12) ◽  
pp. A2597-A2601
Author(s):  
Atsuko Yamazaki ◽  
Hajime Miyashiro
Keyword(s):  
High Precision ◽  
Degradation Rate ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Lithium Ion Cells ◽  
Capacity Degradation ◽  
Discharge Behavior ◽  
Charge Discharge

Effects of Hydrothermal Oxidation Temperature on the Performance of Natural Graphite as an Anode for Lithium-Ion Cells

2011 ◽  
Vol 14 (3) ◽  
pp. 153-157 ◽  
Author(s):  
Mi Lu ◽  
Yanyan Tian ◽  
Bing Huang ◽  
Xiaodong Zheng
Keyword(s):  
Electrochemical Performance ◽  
Room Temperature ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Photoelectron Spectra ◽  
Oxidation Temperature ◽  
Natural Graphite ◽  
Lithium Ion Cells ◽  
Effects Of Temperature ◽  
Charge Discharge

Natural graphite (NG) was hydrothermally oxidized at room temperature, 100 ºC and 200 ºC respectively to analyze the effects of temperature on the electrochemical performance of the NG as an anode for lithium ion cells. Charge/discharge results showed that the sample treated at 100 ºC exhibited the highest initial intercalation capacity of 340.1 mAh/g and a Coulombic efficiency of 89.9%, while the sample treated at 200 ºC showed the highest capacity retention of 96.5% after 20 charge/discharge cycles. X-ray photoelectron spectra revealed that groups containing oxygen were present on the surface of all samples, which explains why the performance of the sample treated at room temperature shows slightly improved electrochemical performance that can be further improved by increasing the oxidation temperature.

scholarly journals Classifying Aged Li-Ion Cells from Notebook Batteries

2020 ◽  
Vol 12 (9) ◽  
pp. 3620 ◽  
Author(s):  
Felipe Salinas ◽  
Julia Kowal
Keyword(s):  
Lithium Ion ◽  
Battery Management System ◽  
Battery Management ◽  
Life Conditions ◽  
Lithium Ion Cells ◽  
Capacity Degradation ◽  
Boosted Decision Tree ◽  
Li Ion ◽  
Aging Mechanisms ◽  
Charge Discharge

A dataset consisting of 90 lithium-ion cells obtained from old notebook batteries containing their response to 100 charge–discharge cycles is presented. The resulting degradation patterns are assigned to four clusters and related to possible aging mechanisms. The records in the battery management system (BMS) of each battery are analyzed to understand the influence of first life conditions in the measured degradation patterns. The analysis reveals that a cluster of cells which experienced mostly calendar aging in 7–13 years hold ~90% of the rated capacity, and exhibit at 0.4 C discharge a linear capacity degradation throughout cycling comparable to new cells. In contrast, a cluster of cells that experienced extensive calendar and cyclic aging can lose ~50% capacity at 0.4 C discharge in a few cycles after reutilization. A model based on a boosted decision tree is applied to forecast the cluster of each cell, using as features the capacity measured in the first cycle, and the records obtained from the BMS. The highest accuracy (83%) is obtained through capacity, where misclassification arises from two clusters containing highly degraded cells with similar initial capacities, but divergent degradation patterns.

Degradation-Safety Analytics in Lithium-Ion Cells: Part I. Aging under Charge/Discharge Cycling

2020 ◽  
Vol 167 (16) ◽  
pp. 160510
Author(s):  
Daniel Juarez-Robles ◽  
Judith A. Jeevarajan ◽  
Partha P. Mukherjee
Keyword(s):  
Lithium Ion ◽  
Lithium Ion Cells ◽  
Charge Discharge

scholarly journals Identification and machine learning prediction of knee-point and knee-onset in capacity degradation curves of lithium-ion cells

Energy and AI ◽  
2020 ◽  
Vol 1 ◽  
pp. 100006 ◽  
Author(s):  
Paula Fermín-Cueto ◽  
Euan McTurk ◽  
Michael Allerhand ◽  
Encarni Medina-Lopez ◽  
Miguel F. Anjos ◽  
...  
Keyword(s):  
Machine Learning ◽  
Lithium Ion ◽  
Lithium Ion Cells ◽  
Knee Point ◽  
Capacity Degradation

Copper nanoparticles spaced 3D graphene films for binder-free lithium-storing electrodes

2016 ◽  
Vol 4 (21) ◽  
pp. 8466-8477 ◽  
Author(s):  
Dong-Jie Guo ◽  
Zi-Ying Wei ◽  
Bo Shi ◽  
Shi-Wen Wang ◽  
Li-Zhen Wang ◽  
...  
Keyword(s):  
Copper Nanoparticles ◽  
Coulombic Efficiency ◽  
Graphene Film ◽  
Lithium Ion ◽  
Copper Nanoparticle ◽  
3D Graphene ◽  
Graphene Films ◽  
Rate Capacity ◽  
Binder Free ◽  
Charge Discharge

Using a copper nanoparticle-spaced graphene film as the anode, a newly developed lithium-ion battery exhibits a high charge/discharge capacity, an excellent reversibility, a high coulombic efficiency, and a good rate capacity.

Monitoring of Intercalation Stages in Lithium-Ion Cells over Charge-Discharge Cycles with Fiber Optic Sensors

2015 ◽  
Vol 162 (14) ◽  
pp. A2664-A2669 ◽  
Author(s):  
Lars Wilko Sommer ◽  
Ajay Raghavan ◽  
Peter Kiesel ◽  
Bhaskar Saha ◽  
Julian Schwartz ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Lithium Ion ◽  
Fiber Optic Sensors ◽  
Lithium Ion Cells ◽  
Charge Discharge

Lithium-Ion Battery Anode Electrochemical Properties of Si/C Composites Using Graphite and Glucose as Carbon Source

2011 ◽  
Vol 347-353 ◽  
pp. 3506-3509
Author(s):  
Xu Ma ◽  
Yu Ling Liu ◽  
Ling Long Kong ◽  
Yan Hong Ding ◽  
Jie Zhao ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Carbon Source ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Charge Capacity ◽  
X Ray ◽  
Battery Anode ◽  
Charge Discharge ◽  
Scanning Electron ◽  
Discharge Test

Si/C composites were synthesized by using graphite and glucose as carbon source. The samples were characterized by X-ray diffractometer (XRD) and field emission scanning electron microscope(SEM). The electrochemical charge/discharge test was used to evaluate capacity and cycling stability of the composites. The first discharge and charge capacity of SGC composite using graphite and glucose as carbon source were 1661mAh/g and 1259.1 mAh/g, and the first coulombic efficiency was 75.8%. After 20 cycles, the capacity of SGC composite was 380 mAh/g and the coulombic efficiency remained over 98%.

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