| Autor: |
Abnavi A; Nano-fabricated Energy Devices Lab, School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran., Sadati Faramarzi M, Abdollahi A, Ramzani R, Ghasemi S, Sanaee Z |
| Jazyk: |
angličtina |
| Zdroj: |
Nanotechnology [Nanotechnology] 2017 Jun 23; Vol. 28 (25), pp. 255404. Date of Electronic Publication: 2017 May 05. |
| DOI: |
10.1088/1361-6528/aa715b |
| Abstrakt: |
Here, we report 3D hierarchical SnO 2 nanowire (NW) core-amorphous silicon shell on free-standing carbon nanotube paper (SnO 2 @a-Si/CNT paper) as an effective anode for flexible lithium-ion battery (LIB) application. This binder-free electrode exhibits a high initial discharge capacity of 3020 mAh g -1 with a large reversible charge capacity of 1250 mAh g -1 at a current density of 250 mA g -1 . Compared to other SnO 2 NW or its core-shell nanostructured anodes, the fabricated SnO 2 @a-Si/CNT structure demonstrates an outstanding performance with high mass loading (∼5.9 mg cm -2 ), high areal capacity (∼5.2 mAh cm -2 ), and large volumetric capacity (∼1750 mAh cm -3 ) after 25 cycles. Due to the incorporation of CNT paper as the current collector, the weight and thickness of the total electrode is effectively reduced with respect to the conventional LIB anodes. The fabricated electrode has a total thickness of only 30 μm and considering the total weight of the electrode (active mass + current collector), an initial discharge/charge capacity of 2460/1018 mAh g -1 is obtained. Hence, this thin, lightweight and highly flexible structure is proposed as an excellent candidate for high-performance LIB anode materials, especially in flexible electronics. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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