Capacity Fade Model for Spinel LiMn<sub>2</sub>O<sub>4</sub>Electrode

Dai, Yiling; Cai, Ling; White, Ralph E.

doi:10.1149/2.026302jes

Cited by 126 publications

(100 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7,9,[21][22][23][24] Previous studies have shown that such a model can predict experimental data adequately. 9,21,25,26 The model considers physical process changing along the electrode thickness direction of a Li-ion battery as illustrated in Figure 1a and diffusion process in the solid active material, which are coupled together through interfacial reaction.…”

Section: Model Development and Optimization Protocolmentioning

confidence: 99%

On Graded Electrode Porosity as a Design Tool for Improving the Energy Density of Batteries

Dai

Srinivasan

2015

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

As the need for higher energy density batteries increases, there have been numerous attempts at tuning the design of the battery electrodes to improve performance. Increasing the electrode loading remains a straightforward method to increase the energy density. Li-ion batteries are typically liquid phase limited; therefore, battery designers attempt to increase the electrode thickness and decrease the porosity until polarization losses become significant. It is in this context that a graded porosity, with varying porosity across electrode, has been explored to reduce liquid phase limitations and thereby decrease the polarization losses. In the literature, mathematical models have been used to suggest that varying porosity designs can lead to improved energy density. In this paper we show that such an enhanced improvement is an artifact of the previous models using arbitrary base cases, and that a similar improvement in energy is readily achievable by judicious choice of a constant porosity. A more careful comparison, as shown in this paper, suggests only a marginal improvement in energy density. Here, we show the methodology used to reach this conclusion and detail the underlying reason for this result. Rechargeable batteries play an increasingly important role as energy-storage devices, especially as power sources for electric vehicles and for stationary storage of intermittent renewable energy. However, significant increase in energy density and reduction in cost is needed for widespread penetration of storage in these applications. 1 The two strategies that are commonly used to improve the energy density (thereby deceasing the cost) are to develop new materials and/or to develop better electrode/battery designs. The former approach has led to a big focus on next-generation cathodes and anodes for Li-ion batteries, 1-3 and on next generation "beyond Li-ion" systems such as Li-S. 1,4,5 The latter approach, wherein new electrode designs are used to improve the energy density/decrease cost, [6][7][8] is the focus of this paper.A main focus of the efforts related to electrode design is on increasing the thickness of the electrode. This has the effect of decreasing the fraction of inactive mass and volume in the cell (current collectors and separators) thereby providing a straightforward method to increase the energy density. However, as the electrode thickness increases, electrolyte-phase mass transfer limitations become more important impeding the power delivery, thereby leading to an inability to satisfy the requirement of the chosen application. [6][7][8] This interplay between energy and power has resulted in the use of thin (ca. 40 μm) electrodes for high-power applications like hybrid electric vehicles and thick (ca. 80 μm) electrodes for high-energy applications such as electric vehicles. 8 The thickness constraints are acute in Li-ion cells due to the low transport properties of the non-aqueous electrolytes, 8,9 with studies showing that the electrolyte is the main cause of the limitations in these batteri...

show abstract

Section: Model Development and Optimization Protocolmentioning

confidence: 99%

On Graded Electrode Porosity as a Design Tool for Improving the Energy Density of Batteries

Dai

Srinivasan

2015

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…This phenomenon is observed in all lithium-ion battery electrodes, but it is especially pronounced in the Si-based electrodes. 8,18 As the loading and thickness increase, both the ion-transport distance and tortuosity of the pores in the composite electrode increase. Thus, lithium ion diffusion is inhibited.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

High Capacity and High Density Functional Conductive Polymer and SiO Anode for High-Energy Lithium-Ion Batteries

Zhao

Yuca

Zheng

et al. 2014

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

High capacity and high density functional conductive polymer binder/ SiO electrodes are fabricated and calendered to various porosities. The effect of calendering is investigated in the reduction of thickness and porosity, as well as the increase of density. SiO particle size remains unchanged after calendering. When compressed to an appropriate density, an improved cycling performance and increased energy density are shown compared to the uncalendered electrode and overcalendered electrode. The calendered electrode has a high-density of ∼1.2 g/cm 3 . A high loading electrode with an areal capacity of ∼3.5 mAh/cm 2 at a C/10 rate is achieved using functional conductive polymer binder and simple and effective calendering method.

show abstract

“…Y. Dai [16] introduces a mathematical model to simulate the stress in the LMO cathode particle. For lithium ion batteries with LMO cathode, a capacity fade model considering the manganese (Mn) dissolution is built by R. E. White [17]. However, mechanism models are very complicated, many parameters and massive calculation are involved.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of commercial lithium ion battery cycle life in electric vehicle: Capacity loss estimation

Han

Ouyang

et al. 2014

Journal of Power Sources

245

106

View full text Add to dashboard Cite

Capacity Fade Model for Spinel LiMn₂O₄Electrode

Cited by 126 publications

References 45 publications

On Graded Electrode Porosity as a Design Tool for Improving the Energy Density of Batteries

On Graded Electrode Porosity as a Design Tool for Improving the Energy Density of Batteries

High Capacity and High Density Functional Conductive Polymer and SiO Anode for High-Energy Lithium-Ion Batteries

A comparative study of commercial lithium ion battery cycle life in electric vehicle: Capacity loss estimation

Contact Info

Product

Resources

About

Capacity Fade Model for Spinel LiMn2O4Electrode

Cited by 126 publications

References 45 publications

On Graded Electrode Porosity as a Design Tool for Improving the Energy Density of Batteries

On Graded Electrode Porosity as a Design Tool for Improving the Energy Density of Batteries

High Capacity and High Density Functional Conductive Polymer and SiO Anode for High-Energy Lithium-Ion Batteries

A comparative study of commercial lithium ion battery cycle life in electric vehicle: Capacity loss estimation

Contact Info

Product

Resources

About

Capacity Fade Model for Spinel LiMn₂O₄Electrode