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首页> 外文期刊>RSC Advances >Facile in situ growth of ZnO nanosheets standing on Ni foam as binder-free anodes for lithium ion batteries
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Facile in situ growth of ZnO nanosheets standing on Ni foam as binder-free anodes for lithium ion batteries

机译：方便地原位生长在Ni泡沫上的ZnO纳米片作为锂离子电池的无粘合剂阳极

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摘要

ZnO has attracted increasing attention as an anode for lithium ion batteries. However, the application of such anode materials remains restricted by their poor conductivity and large volume changes during the charge/discharge process. Herein, we report a simple hydrothermal method to synthesize ZnO nanosheets with a large surface area standing on a Ni foam framework, which is applied as a binder-free anode for lithium ion batteries. ZnO nanosheets were grown in situ on Ni foam, resulting in enhanced conductivity and enough space to buffer the volume changes of the battery. The ZnO nanosheets@Ni foam anode showed a high specific capacity (1507 mA h g ~(?1) at 0.2 A g ~(?1) ), good capacity retention (1292 mA h g ~(?1) after 45 cycles), and superior rate capacity, which are better than those of ZnO nanomaterial-based anodes reported previously. Moreover, other transition metal oxides, such as Fe _(2) O _(3) and NiO were also formed in situ on Ni foam with perfect standing nanosheets structures by this hydrothermal method, confirming the universality and efficiency of this synthetic route.
机译：ZnO作为锂离子电池的负极已引起越来越多的关注。但是，这种负极材料的应用仍然受到其导电性差和在充电/放电过程中体积变化大的限制。在这里，我们报告了一种简单的水热法来合成具有大表面积的NiO泡沫骨架上的ZnO纳米片，该纳米片被用作锂离子电池的无粘合剂阳极。 ZnO纳米片材在Ni泡沫上原位生长，从而提高了电导率并提供了足够的空间来缓冲电池的体积变化。 ZnO纳米片@Ni泡沫阳极显示出高的比容量（0.2 A g〜（？1）时为1507 mA hg〜（？1）），良好的容量保持率（45个循环后为1292 mA hg〜（？1））和优异的倍率容量，优于先前报道的基于ZnO纳米材料的阳极。此外，通过这种水热法，还可以在具有完美站立纳米片结构的镍泡沫上原位形成其他过渡金属氧化物，如Fe _（2）O _（3）和NiO，证实了该合成路线的普遍性和有效性。

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