Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7733122 | Journal of Power Sources | 2015 | 9 Pages |
Abstract
Preparation of novel nanocomposite structure of ZnFe2O4-C is achieved by combining a sol-gel and a low energy ball milling method. The crucial feature of the composite's structure is that sol-gel synthesised ZnFe2O4 nanoparticles are dispersed and attached uniformly along the chains of Super P Li⢠carbon black matrix by adopting a low energy ball milling. The composite ZnFe2O4-C electrodes are capable of delivering a very stable reversible capacity of 681 mAh gâ1 (96% retention of the calculated theoretical capacity of â¼710 mAh gâ1) at 0.1 C after 100 cycles with a remarkable Coulombic efficiency (82%) improvement in the first cycle. The rate capability of the composite is significantly improved and obtained capacity was as high as 702 at 0.1, 648 at 0.5, 582 at 1, 547 at 2 and 469 mAh gâ1 at 4 C (2.85 A gâ1), respectively. When cell is returned to 0.1 C, the capacity recovery was still â¼98%. Overall, the electrochemical performance (in terms of cycling stability, high rate capability, and capacity retention) is outstanding and much better than those of the related reported works. Therefore, our smart electrode design enables ZnFe2O4-C sample to be a high quality anode material for lithium-ion batteries.
Related Topics
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Authors
Rahul Mundiyaniyil Thankachan, Md Mokhlesur Rahman, Irin Sultana, Alexey M. Glushenkov, Sabu Thomas, Nandakumar Kalarikkal, Ying Chen,