Analyzing Capacitive Characteristics of Lithium-Ion Batteries Using a Distribution Function of the Differential Capacity

2015 ◽  
Vol 69 (1) ◽  
pp. 45-50 ◽  
Author(s):  
M. Schoenleber ◽  
E. Ivers-Tiffee
Keyword(s):  
Distribution Function ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Differential Capacity

scholarly journals Molecular dynamics study on the microstructure of CH3COOLi solutions with different concentrations

2018 ◽  
Vol 11 (04) ◽  
pp. 1850075
Author(s):  
Guoyu Tan ◽  
Jiaxin Zheng ◽  
Feng Pan
Keyword(s):  
Molecular Dynamics ◽  
Distribution Function ◽  
Oxygen Atom ◽  
Lithium Ion Batteries ◽  
Radial Distribution Function ◽  
Lithium Ion ◽  
Aqueous System ◽  
Spatial Structures ◽  
Organic Electrolytes ◽  
Dynamics Simulations

Due to the toxic and flammable problems of organic electrolytes, the study on concentrated aqueous system for lithium-ion batteries (LIBs) has attracted wide attention. In this paper, by molecular dynamics simulations, the CH3COOLi aqueous system is considered as the potential concentrated aqueous system for LIBs, and all the variations of the microstructure of the aqueous system from dilution to concentration are analyzed. The details of microstructure are discussed, especially the interactions concerning anions. Among them, the first peak of RDF (radial distribution function) between the Li[Formula: see text] ion and the oxygen atom in CH3COOLi is 2.9[Formula: see text]Å, which does not change from dilution to concentration. This RDF information further indicates that when the concentration increases, the microstructures of small components formed by any two clusters do not change much, but at the same time, the spatial structures constructed by many small components are gradually built up from a broader perspective.

scholarly journals Determination of the Differential Capacity of Lithium-Ion Batteries by the Deconvolution of Electrochemical Impedance Spectra

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 915
Author(s):  
Dongxu Guo ◽  
Geng Yang ◽  
Guangjin Zhao ◽  
Mengchao Yi ◽  
Xuning Feng ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Diffusion Processes ◽  
Electrochemical Impedance ◽  
Estimation Method ◽  
Lithium Ion ◽  
Joint Estimation ◽  
Frequency Resolution ◽  
Differential Capacity ◽  
Model Free ◽  
Incremental Capacity

Electrochemical impedance spectroscopy (EIS) is a powerful tool for investigating electrochemical systems, such as lithium-ion batteries or fuel cells, given its high frequency resolution. The distribution of relaxation times (DRT) method offers a model-free approach for a deeper understanding of EIS data. However, in lithium-ion batteries, the differential capacity caused by diffusion processes is non-negligible and cannot be decomposed by the DRT method, which limits the applicability of the DRT method to lithium-ion batteries. In this study, a joint estimation method with Tikhonov regularization is proposed to estimate the differential capacity and the DRT simultaneously. Moreover, the equivalence of the differential capacity and the incremental capacity is proven. Different types of commercial lithium-ion batteries are tested to validate the joint estimation method and to verify the equivalence. The differential capacity is shown to be a promising approach to the evaluation of the state-of-health (SOH) of lithium-ion batteries based on its equivalence with the incremental capacity.

CuS2 sheets: a hidden anode material with a high capacity for sodium-ion batteries

2021 ◽  
Author(s):  
Shaohua Lu ◽  
Weidong Hu ◽  
Xiaojun Hu
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Low Cost ◽  
High Capacity ◽  
Lithium Ion ◽  
Sodium Ion ◽  
Sodium Ion Batteries

Due to their low cost and improved safety compared to lithium-ion batteries, sodium-ion batteries have attracted worldwide attention in recent decades.

Synthesis and study of carbon nanostructured additives for lithium-ion batteries

2018 ◽  
Vol 125 (4) ◽  
pp. 8-13
Author(s):  
А.Б. Абдрахманова ◽  
◽  
В. А. Кривченко ◽  
Н. М. Омарова
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion
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