Abstract
Active/inactive alloyed systems in battery materials have been shown to relieve the agglomeration of active materials during cycling, thus exhibiting enhanced cyclability. However, the immoderate interaction between active and inactive elements can reduce the capacity of active materials. The present study realized a compositionally gradational heterostructure composed of a Ni core, NiSb interface, and attached Sb crystals via pulsed electrodeposition under controlled conditions. The 3-D Sb/NiSb/Ni electrode showed highly stable cycling performance for sodium storage at the expense of capacity decrease (391mAhg<sup>-1</sup> at a current rate of 66mAg<sup>-1</sup> after 300 cycles). High-resolution transmission electron microscopy analysis of the cycled samples revealed that the reversible solid-state reaction occurs between Sb/NiSb/Ni and Na<inf>3</inf>Sb/NaSb/Ni heterostructures during sodiation/desodiation. The cycling stability was attributed to the strong interaction between Ni and Sb.
| Original language | English |
|---|---|
| Pages (from-to) | 479-489 |
| Number of pages | 11 |
| Journal | Nano Energy |
| Volume | 15 |
| DOIs | |
| Publication status | Published - 2015 Jul 1 |
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Keywords
- 3-D microbatteries
- Gradational heterostructures
- Nano-scale alloying
- Sodium ion batteries
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Electrical and Electronic Engineering
Cite this
Highly stable sodium storage in 3-D gradational Sb-NiSb-Ni heterostructures. / Lee, Chan Woo; Kim, Jae Chan; Park, Sangbaek; Song, Hee Jo; Kim, Dong-Wan.
In: Nano Energy, Vol. 15, 01.07.2015, p. 479-489.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Highly stable sodium storage in 3-D gradational Sb-NiSb-Ni heterostructures
AU - Lee, Chan Woo
AU - Kim, Jae Chan
AU - Park, Sangbaek
AU - Song, Hee Jo
AU - Kim, Dong-Wan
PY - 2015/7/1
Y1 - 2015/7/1
N2 - Active/inactive alloyed systems in battery materials have been shown to relieve the agglomeration of active materials during cycling, thus exhibiting enhanced cyclability. However, the immoderate interaction between active and inactive elements can reduce the capacity of active materials. The present study realized a compositionally gradational heterostructure composed of a Ni core, NiSb interface, and attached Sb crystals via pulsed electrodeposition under controlled conditions. The 3-D Sb/NiSb/Ni electrode showed highly stable cycling performance for sodium storage at the expense of capacity decrease (391mAhg-1 at a current rate of 66mAg-1 after 300 cycles). High-resolution transmission electron microscopy analysis of the cycled samples revealed that the reversible solid-state reaction occurs between Sb/NiSb/Ni and Na3Sb/NaSb/Ni heterostructures during sodiation/desodiation. The cycling stability was attributed to the strong interaction between Ni and Sb.
AB - Active/inactive alloyed systems in battery materials have been shown to relieve the agglomeration of active materials during cycling, thus exhibiting enhanced cyclability. However, the immoderate interaction between active and inactive elements can reduce the capacity of active materials. The present study realized a compositionally gradational heterostructure composed of a Ni core, NiSb interface, and attached Sb crystals via pulsed electrodeposition under controlled conditions. The 3-D Sb/NiSb/Ni electrode showed highly stable cycling performance for sodium storage at the expense of capacity decrease (391mAhg-1 at a current rate of 66mAg-1 after 300 cycles). High-resolution transmission electron microscopy analysis of the cycled samples revealed that the reversible solid-state reaction occurs between Sb/NiSb/Ni and Na3Sb/NaSb/Ni heterostructures during sodiation/desodiation. The cycling stability was attributed to the strong interaction between Ni and Sb.
KW - 3-D microbatteries
KW - Gradational heterostructures
KW - Nano-scale alloying
KW - Sodium ion batteries
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U2 - 10.1016/j.nanoen.2015.05.013
DO - 10.1016/j.nanoen.2015.05.013
M3 - Article
VL - 15
SP - 479
EP - 489
JO - Nano Energy
JF - Nano Energy
SN - 2211-2855
ER -