374
Binder-Free Metal Fibril–Supported Fe2O3 Anode for High-Performance Lithium-Ion Batteries

Tuesday, 10 June 2014
Cernobbio Wing (Villa Erba)
J. Choi, J. Jeong, M. H. Ryou (Hanbat National University), C. H. Kim (Shine Co. Ltd), and Y. M. Lee (Hanbat National University)
Metal oxides have been extensively investigated as anode materials for lithium-ion batteries (LIBs) owing to their higher theoretical capacity compared to graphitic carbon (372 mAh g−1), which has been widely used as a commercial anode material1,2. Among the established metal oxide anode materials, Fe2O3 is considered a promising anode candidate because of its numerous advantages including high theoretical capacity (1007 mAh g−1), abundance, relatively low cost, and environmental friendliness. However, a large volume of expansion (six Li+ per formula unit) and electrode destruction upon electrochemical cycling results in severe capacity fading. Moreover, due to the insulating properties of the discharge product, Li2O (Fe2O3 + 6Li+ ↔ 2Fe + 3Li2O), Fe2O3 suffers from sluggish reaction kinetics, especially at a high current rate3.

To solve these problems, we report a simple fabrication process for a stainless steel metal fibril–supported Fe2O3 (Fe2O3/SF) material as a lithium battery anode. Utilizing the well-developed 3D structure of Fe2O3/SF, the material shows not only a superior rate capability but also extremely long cycle life (2000 cycles), even at a high current density.

References

[1] A. S. Aricò, P. Bruce, B. Scrosati, J. M. Tarascon and W. Van Schalkwijk, Nat. Mater., 4, 2005, 366-377.

[2] Z. Wang, L. Zhou and X. W. Lou, Adv. Mater., 24, 2012, 1903-1911

[3] Q. Su, D. Xie, J. Zhang, G. Du and B. Xu, ACS Nano, 7, 2013, 9115-9121.