Details
| Original language | English |
|---|---|
| Journal | SMALL |
| Early online date | 28 Feb 2025 |
| Publication status | E-pub ahead of print - 28 Feb 2025 |
Abstract
Due to its high theoretical capacity, cobalt oxide (Co3O4) has attracted attention to sodium-ion battery (SIB) anodes. However, its low conductivity and poor rate performance have limited its practical application. This work proposes a co-precipitation doping strategy to synthesize iron-doped Co3O4 nanoparticles (FexCo3-xO4 NPs). Both experimental and theoretical results confirm that iron (Fe) doping at octahedral sites within spinel structures is a critical factor in enhancing rate performance. The decreased bandgap and enlarged ion transport spacing originate in Fe doping. This effectively facilitates the electron and Na-ion (Na+) transport during discharge/charge processes, delivering an impressive rate capability of 402.9 mAh g−¹ at 3 A g−¹. The FexCo3-xO4 NPs demonstrate remarkable cycling stability. They maintain a high specific capacity of 786.2 mAh g−¹ even after 500 cycles at 0.5 A g−¹, with no noticeable capacity fading. When assembled into a Na-ion full cell, a remarkable discharge capacity of 105 mAh g−1 with stable cycling performance is attained. This work provides valuable insights into the functional design of high-rate electrodes, offering a promising approach to addressing the critical challenges faced by sodium anodes.
Keywords
- electronic conductivity, high-rate performance, iron-doped CoO sodium-ion diffusion, transport spacing
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Biotechnology
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- Biomaterials
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Engineering (miscellaneous)
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In: SMALL, 28.02.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Facilitating Sodium-Ion Diffusion in Fe-Doped Co3O4 for High-Rate Performance
AU - Fu, Yonghuan
AU - Sun, Guowei
AU - Lucka, Rene
AU - Song, Qijun
AU - Renz, Franz
AU - Zhao, Huaping
AU - Wang, Zhijie
AU - Lei, Yong
N1 - Publisher Copyright: © 2025 The Author(s). Small published by Wiley-VCH GmbH.
PY - 2025/2/28
Y1 - 2025/2/28
N2 - Due to its high theoretical capacity, cobalt oxide (Co3O4) has attracted attention to sodium-ion battery (SIB) anodes. However, its low conductivity and poor rate performance have limited its practical application. This work proposes a co-precipitation doping strategy to synthesize iron-doped Co3O4 nanoparticles (FexCo3-xO4 NPs). Both experimental and theoretical results confirm that iron (Fe) doping at octahedral sites within spinel structures is a critical factor in enhancing rate performance. The decreased bandgap and enlarged ion transport spacing originate in Fe doping. This effectively facilitates the electron and Na-ion (Na+) transport during discharge/charge processes, delivering an impressive rate capability of 402.9 mAh g−¹ at 3 A g−¹. The FexCo3-xO4 NPs demonstrate remarkable cycling stability. They maintain a high specific capacity of 786.2 mAh g−¹ even after 500 cycles at 0.5 A g−¹, with no noticeable capacity fading. When assembled into a Na-ion full cell, a remarkable discharge capacity of 105 mAh g−1 with stable cycling performance is attained. This work provides valuable insights into the functional design of high-rate electrodes, offering a promising approach to addressing the critical challenges faced by sodium anodes.
AB - Due to its high theoretical capacity, cobalt oxide (Co3O4) has attracted attention to sodium-ion battery (SIB) anodes. However, its low conductivity and poor rate performance have limited its practical application. This work proposes a co-precipitation doping strategy to synthesize iron-doped Co3O4 nanoparticles (FexCo3-xO4 NPs). Both experimental and theoretical results confirm that iron (Fe) doping at octahedral sites within spinel structures is a critical factor in enhancing rate performance. The decreased bandgap and enlarged ion transport spacing originate in Fe doping. This effectively facilitates the electron and Na-ion (Na+) transport during discharge/charge processes, delivering an impressive rate capability of 402.9 mAh g−¹ at 3 A g−¹. The FexCo3-xO4 NPs demonstrate remarkable cycling stability. They maintain a high specific capacity of 786.2 mAh g−¹ even after 500 cycles at 0.5 A g−¹, with no noticeable capacity fading. When assembled into a Na-ion full cell, a remarkable discharge capacity of 105 mAh g−1 with stable cycling performance is attained. This work provides valuable insights into the functional design of high-rate electrodes, offering a promising approach to addressing the critical challenges faced by sodium anodes.
KW - electronic conductivity
KW - high-rate performance
KW - iron-doped CoO sodium-ion diffusion
KW - transport spacing
UR - http://www.scopus.com/inward/record.url?scp=85219649494&partnerID=8YFLogxK
U2 - 10.1002/smll.202412449
DO - 10.1002/smll.202412449
M3 - Article
AN - SCOPUS:85219649494
JO - SMALL
JF - SMALL
SN - 1613-6810
ER -