Abstract
Despite their large theoretical storage capability, Na-Sn batteries exhibit poor round-trip energy efficiencies as compared to Li-Si batteries. Here, we report the results of a comprehensive study to elucidate how and why Na-Sn batteries exhibit such a low energy efficiency. As a convincing evidence for this behavior, we observed that the resistivity of the Sn anode increased by 8 orders of magnitude during in situ sodiation experiments, which is attributed to the formation of electrically resistive Zintl ions in the sodiated Sn. Continual sodiation induced the development of residual stresses at the Sn anode and caused the distortion of Zintl ions from their ideal configuration. This distortion caused a change in the electronic structure, resulting in the increased resistivity of the sodiated Sn. Our findings offer some solutions that can be used to improve the energy efficiency of Na-Sn batteries.
| Original language | English |
|---|---|
| Pages (from-to) | 679-686 |
| Number of pages | 8 |
| Journal | Nano Letters |
| Volume | 17 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2017 Feb 8 |
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Keywords
- ab initio simulation
- FEM
- in situ sodiation experiment
- Na-ion battery
- resistivity
- Zintl ion
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering
Cite this
Formation of Zintl Ions and Their Configurational Change during Sodiation in Na-Sn Battery. / Choi, Yong Seok; Byeon, Young Woon; Ahn, Jae Pyoung; Lee, Jae-chul.
In: Nano Letters, Vol. 17, No. 2, 08.02.2017, p. 679-686.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Formation of Zintl Ions and Their Configurational Change during Sodiation in Na-Sn Battery
AU - Choi, Yong Seok
AU - Byeon, Young Woon
AU - Ahn, Jae Pyoung
AU - Lee, Jae-chul
PY - 2017/2/8
Y1 - 2017/2/8
N2 - Despite their large theoretical storage capability, Na-Sn batteries exhibit poor round-trip energy efficiencies as compared to Li-Si batteries. Here, we report the results of a comprehensive study to elucidate how and why Na-Sn batteries exhibit such a low energy efficiency. As a convincing evidence for this behavior, we observed that the resistivity of the Sn anode increased by 8 orders of magnitude during in situ sodiation experiments, which is attributed to the formation of electrically resistive Zintl ions in the sodiated Sn. Continual sodiation induced the development of residual stresses at the Sn anode and caused the distortion of Zintl ions from their ideal configuration. This distortion caused a change in the electronic structure, resulting in the increased resistivity of the sodiated Sn. Our findings offer some solutions that can be used to improve the energy efficiency of Na-Sn batteries.
AB - Despite their large theoretical storage capability, Na-Sn batteries exhibit poor round-trip energy efficiencies as compared to Li-Si batteries. Here, we report the results of a comprehensive study to elucidate how and why Na-Sn batteries exhibit such a low energy efficiency. As a convincing evidence for this behavior, we observed that the resistivity of the Sn anode increased by 8 orders of magnitude during in situ sodiation experiments, which is attributed to the formation of electrically resistive Zintl ions in the sodiated Sn. Continual sodiation induced the development of residual stresses at the Sn anode and caused the distortion of Zintl ions from their ideal configuration. This distortion caused a change in the electronic structure, resulting in the increased resistivity of the sodiated Sn. Our findings offer some solutions that can be used to improve the energy efficiency of Na-Sn batteries.
KW - ab initio simulation
KW - FEM
KW - in situ sodiation experiment
KW - Na-ion battery
KW - resistivity
KW - Zintl ion
UR - http://www.scopus.com/inward/record.url?scp=85012016425&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85012016425&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.6b03690
DO - 10.1021/acs.nanolett.6b03690
M3 - Article
C2 - 28079379
AN - SCOPUS:85012016425
VL - 17
SP - 679
EP - 686
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 2
ER -