Bulk-Nanoporous-Silicon Negative Electrode with Extremely High Cyclability for Lithium-Ion Batteries Prepared Using a Top-Down Process
Bulk-Nanoporous-Silicon Negative Electrode with Extremely High Cyclability for Lithium-Ion Batteries Prepared Using a Top-Down Process
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DOI：
10.1021/nl501500g
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发表时间：
2014-08-01
期刊：
影响因子：
10.8
通讯作者：
Kato, Hidemi
中科院分区：
文献类型：
--
作者：
Wada, Takeshi;Ichitsubo, Tetsu;Kato, Hidemi
我们采用自顶向下的方法，在金属熔体中去合金化，合成了独立体三维纳米多孔硅。利用这种纳米多孔硅，我们制备了高锂容量的负极，接近其理论极限，并极大地延长了循环寿命，与使用纳米硅制成的电极相比，电池的性能有了很大的提高。通过在其毛孔的调节体积限制下操作电极，我们延长了它们的循环寿命。
We synthesized freestanding bulk three-dimensional nanoporous Si using dealloying in a metallic melt, a top-down process. Using this nanoporous Si, we fabricated negative electrodes with high lithium capacity, nearing their theoretical limits, and greatly extended cycle lifetimes, considerably improving the battery performance compared with those using electrodes made from silicon nanoparticles. By operating the electrodes below the accommodation volume limit of their pores, we prolonged their cycle lifetime.