کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1284510 | 1498021 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Stable high areal capacity lithium-ion battery anodes based on three-dimensional Ni–Sn nanowire networks Stable high areal capacity lithium-ion battery anodes based on three-dimensional Ni–Sn nanowire networks](/preview/png/1284510.png)
Nanowire arrays present an excellent candidate for high performance lithium-ion battery electrodes. However, agglomeration in long nanowire arrays impedes nanowire-based electrodes from delivering high areal capacity, by degrading the nanoscale wires to micro-sized bundles and reducing the mechanical stability. In this study, we develop a simple way to fabricate three-dimensional (3D) nickel–tin (Ni–Sn) nanowire networks by using 3D porous anodic alumina templates synthesized from low-cost impure aluminum foils. By eliminating agglomeration, stable high areal capacity anodes are demonstrated with 3D self-supporting Ni–Sn nanowire network structures. With a nanowire length of 40 μm, the 3D Ni–Sn nanowire networks can deliver an areal capacity as high as 4.3 mAh cm−2 with a cycle life longer than 50 cycles. The 3D Ni–Sn nanowire networks also exhibit an excellent rate capability with 72% of the capacity retained when the test rate increases from C/5 to 6C.
Figure optionsDownload as PowerPoint slideHighlights
► Agglomeration in long straight nanowire arrays causes performance.
► 3D nanowire networks are fabricated using 3D PAA templates.
► Electrochemical performance of 3D nanowire networks is length-independent.
► Linear increase of areal capacity with active material mass loading is realized.
Journal: Journal of Power Sources - Volume 211, 1 August 2012, Pages 46–51