Abstract
To achieve a high energy density for Li-ion batteries, it is important to optimize the electrode thickness and electrode density. It is common to design the electrodes to be thick and dense to achieve a high energy density. However, highly tortuous transport paths in thick and dense electrodes can lead to severe transport losses, which negatively affect the cell performance. In this work, we investigated the effects of varying the electrode thickness and density on lithium ion transport in the electrolytes by means of both experiments and simulations. Both results indicated that an additional capacity loss occurs from the electrode with low porosity because the effective diffusivity decreased in the electrolyte phase. Optimal ranges of the electrode thickness and density (porosity) that can be used to help design high-power LiFePO4/ graphite batteries were also suggested in this work.
| Original language | English |
|---|---|
| Pages (from-to) | 253-262 |
| Number of pages | 10 |
| Journal | Journal of Applied Electrochemistry |
| Volume | 43 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2013 Jan 1 |
| Externally published | Yes |
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Keywords
- Effective diffusivity
- Electrode density
- Electrode thickness
- LiFePO
- Lithium-ion battery
- Tortuosity
ASJC Scopus subject areas
- Chemical Engineering(all)
- Electrochemistry
- Materials Chemistry
Cite this
Transportation properties in nanosized LiFePO4 positive electrodes and their effects on the cell performance. / Yu, Seung-Ho; Kim, Soo; Kim, Tae Young; Nam, Jin Hyun; Cho, Won Il.
In: Journal of Applied Electrochemistry, Vol. 43, No. 3, 01.01.2013, p. 253-262.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Transportation properties in nanosized LiFePO4 positive electrodes and their effects on the cell performance
AU - Yu, Seung-Ho
AU - Kim, Soo
AU - Kim, Tae Young
AU - Nam, Jin Hyun
AU - Cho, Won Il
PY - 2013/1/1
Y1 - 2013/1/1
N2 - To achieve a high energy density for Li-ion batteries, it is important to optimize the electrode thickness and electrode density. It is common to design the electrodes to be thick and dense to achieve a high energy density. However, highly tortuous transport paths in thick and dense electrodes can lead to severe transport losses, which negatively affect the cell performance. In this work, we investigated the effects of varying the electrode thickness and density on lithium ion transport in the electrolytes by means of both experiments and simulations. Both results indicated that an additional capacity loss occurs from the electrode with low porosity because the effective diffusivity decreased in the electrolyte phase. Optimal ranges of the electrode thickness and density (porosity) that can be used to help design high-power LiFePO4/ graphite batteries were also suggested in this work.
AB - To achieve a high energy density for Li-ion batteries, it is important to optimize the electrode thickness and electrode density. It is common to design the electrodes to be thick and dense to achieve a high energy density. However, highly tortuous transport paths in thick and dense electrodes can lead to severe transport losses, which negatively affect the cell performance. In this work, we investigated the effects of varying the electrode thickness and density on lithium ion transport in the electrolytes by means of both experiments and simulations. Both results indicated that an additional capacity loss occurs from the electrode with low porosity because the effective diffusivity decreased in the electrolyte phase. Optimal ranges of the electrode thickness and density (porosity) that can be used to help design high-power LiFePO4/ graphite batteries were also suggested in this work.
KW - Effective diffusivity
KW - Electrode density
KW - Electrode thickness
KW - LiFePO
KW - Lithium-ion battery
KW - Tortuosity
UR - http://www.scopus.com/inward/record.url?scp=84893648863&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84893648863&partnerID=8YFLogxK
U2 - 10.1007/s10800-012-0512-3
DO - 10.1007/s10800-012-0512-3
M3 - Article
VL - 43
SP - 253
EP - 262
JO - Journal of Applied Electrochemistry
JF - Journal of Applied Electrochemistry
SN - 0021-891X
IS - 3
ER -