Tags

Type your tag names separated by a space and hit enter

Extremely Small Pyrrhotite Fe7 S8 Nanocrystals with Simultaneous Carbon-Encapsulation for High-Performance Na-Ion Batteries.
Small. 2018 01; 14(2)S

Abstract

Na/FeSx batteries have remarkable potential applicability due to their high theoretical capacity and cost-effectiveness. However, realization of high power-capability and long-term cyclability remains a major challenge. Herein, ultrafine Fe7 S8 @C nanocrystals (NCs) as a promising anode material for a Na-ion battery that addresses the above two issues simultaneously is reported. An Fe7 S8 core with quantum size (≈10 nm) overcomes the kinetic and thermodynamic constraints of the Na-S conversion reaction. In addition, the high degree of interconnection through carbon shells improves the electronic transport along the structure. As a result, the Fe7 S8 @C NCs electrode achieves excellent power capability of 550 mA h g-1 (≈79% retention of its theoretical capacity) at a current rate of 2700 mA g-1 . Furthermore, a conformal carbon shell acts as a buffer layer to prevent severe volume change, which provides outstanding cyclability of ≈447 mA h g-1 after 1000 cycles (≈71% retention of the initial charge capacity).

Authors+Show Affiliations

Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul, 05006, Republic of Korea.Carbon Composites Department, Composites Research Division, Korea Institute of Materials Science (KIMS), 797 Changwondaero, Changwon, 51508, Republic of Korea.Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

29171932

Citation

Choi, Min-Jae, et al. "Extremely Small Pyrrhotite Fe7 S8 Nanocrystals With Simultaneous Carbon-Encapsulation for High-Performance Na-Ion Batteries." Small (Weinheim an Der Bergstrasse, Germany), vol. 14, no. 2, 2018.
Choi MJ, Kim J, Yoo JK, et al. Extremely Small Pyrrhotite Fe7 S8 Nanocrystals with Simultaneous Carbon-Encapsulation for High-Performance Na-Ion Batteries. Small. 2018;14(2).
Choi, M. J., Kim, J., Yoo, J. K., Yim, S., Jeon, J., & Jung, Y. S. (2018). Extremely Small Pyrrhotite Fe7 S8 Nanocrystals with Simultaneous Carbon-Encapsulation for High-Performance Na-Ion Batteries. Small (Weinheim an Der Bergstrasse, Germany), 14(2). https://doi.org/10.1002/smll.201702816
Choi MJ, et al. Extremely Small Pyrrhotite Fe7 S8 Nanocrystals With Simultaneous Carbon-Encapsulation for High-Performance Na-Ion Batteries. Small. 2018;14(2) PubMed PMID: 29171932.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Extremely Small Pyrrhotite Fe7 S8 Nanocrystals with Simultaneous Carbon-Encapsulation for High-Performance Na-Ion Batteries. AU - Choi,Min-Jae, AU - Kim,Jongsoon, AU - Yoo,Jung-Keun, AU - Yim,Soonmin, AU - Jeon,Jaebeom, AU - Jung,Yeon Sik, Y1 - 2017/11/24/ PY - 2017/08/15/received PY - 2017/09/15/revised PY - 2017/11/25/pubmed PY - 2017/11/25/medline PY - 2017/11/25/entrez KW - carbon shells KW - colloidal nanocrystals KW - one-pot synthesis KW - pyrrhotite KW - sodium-ion batteries JF - Small (Weinheim an der Bergstrasse, Germany) JO - Small VL - 14 IS - 2 N2 - Na/FeSx batteries have remarkable potential applicability due to their high theoretical capacity and cost-effectiveness. However, realization of high power-capability and long-term cyclability remains a major challenge. Herein, ultrafine Fe7 S8 @C nanocrystals (NCs) as a promising anode material for a Na-ion battery that addresses the above two issues simultaneously is reported. An Fe7 S8 core with quantum size (≈10 nm) overcomes the kinetic and thermodynamic constraints of the Na-S conversion reaction. In addition, the high degree of interconnection through carbon shells improves the electronic transport along the structure. As a result, the Fe7 S8 @C NCs electrode achieves excellent power capability of 550 mA h g-1 (≈79% retention of its theoretical capacity) at a current rate of 2700 mA g-1 . Furthermore, a conformal carbon shell acts as a buffer layer to prevent severe volume change, which provides outstanding cyclability of ≈447 mA h g-1 after 1000 cycles (≈71% retention of the initial charge capacity). SN - 1613-6829 UR - https://www.unboundmedicine.com/medline/citation/29171932/Extremely_Small_Pyrrhotite_Fe7_S8_Nanocrystals_with_Simultaneous_Carbon_Encapsulation_for_High_Performance_Na_Ion_Batteries_ L2 - https://doi.org/10.1002/smll.201702816 DB - PRIME DP - Unbound Medicine ER -
Try the Free App:
Prime PubMed app for iOS iPhone iPad
Prime PubMed app for Android
Prime PubMed is provided
free to individuals by:
Unbound Medicine.