Interconnected porous MnO nanoflakes for high-performance lithium ion battery anodes
Interconnected porous MnO nanoflakes for high-performance lithium ion battery anodes
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用于高性能锂离子电池阳极的互连多孔MnO纳米片
DOI：
10.1039/c2jm30604b
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
He, Deyan
中科院分区：
文献类型：
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作者：
Li, Xiuwan;Li, Dan;He, Deyan
以水热法合成的MnO_2为前驱体，在氢气中还原，制备了泡沫镍上的相互连接的多孔MnO纳米片。该结构被应用于锂离子电池作为电极。与合成的MnO 2阳极相比，多孔MnO纳米片显示出上级循环稳定性和倍率性能。在第二次放电的电流密度为246 mA g-1时，获得了568.7 mA h g-1的高可逆容量。在以高达2460 mA g−1的各种电流密度循环后，其在第200次充放电循环时保持708.4 mA h g−1的容量，并在高达2460 mA g−1的电流密度下提供376.4 mA h g−1的容量，表明在Ni泡沫上生长的多孔MnO纳米片的结构是锂离子电池的有前途的电极。
Interconnected porous MnO nanoflakes on nickel foam were prepared by a reduction of hydrothermal synthesized MnO2 precursor in hydrogen. The architectures were applied to lithium ion batteries as electrodes. Compared with the as-synthesized MnO2 anode, porous MnO nanoflakes showed superior cycling stability and rate performance. A high reversible capacity of 568.7 mA h g−1 was obtained at a current density of 246 mA g−1 for the second discharge. It retained a capacity of 708.4 mA h g−1 at the 200th charge–discharge cycle after cycling with various current densities up to 2460 mA g−1 and delivered a capacity of 376.4 mA h g−1 at a current density as high as 2460 mA g−1, indicating that the architecture of the porous MnO nanoflakes grown on Ni foam is a promising electrode for lithium ion batteries.