Construction of sugar gourd-like yolk-shell Ni-Mo-Co-S nanocage arrays for high-performance alkaline battery
Construction of sugar gourd-like yolk-shell Ni-Mo-Co-S nanocage arrays for high-performance alkaline battery
复制标题
高性能碱性电池用糖葫芦状蛋黄壳Ni-Mo-Co-S纳米笼阵列的构建
DOI：
10.1016/j.ensm.2019.10.025
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发表时间：
2020
影响因子：
20.4
通讯作者：
Zhan Hongbing
中科院分区：
文献类型：
--
作者：
Fei Ban;Yao Zhifan;Cai Daoping;Si Junhui;Wang Qianting;Chen Qidi;Sa Baisheng;Peng Kaiping;Zhan Hongbing
具有中空和复杂中空结构的混合过渡金属硫化物（TMS）作为高性能碱性二次电池正极材料受到广泛关注。然而，这些基于粉末的电极材料必须进一步与绝缘聚合物粘合剂混合，并且遭受复杂的电极制造工艺。在此，我们第一次展示了通过一种简单的金属有机骨架（MOF）接合策略在泡沫镍（NF）上精细设计和合成糖壳状多组分蛋黄壳Ni-Mo-Co-S纳米笼阵列（NCAs）。合成过程包括在室温下在NiMoO 4·xH 2 O纳米棒阵列（NRA）上生长钴基沸石咪唑骨架（ZIF-67）多面体，然后进行充分的硫化反应。得益于有趣的结构和成分优势，蛋黄壳Ni-Mo-Co-S NCAs/NF无粘合剂电极在5 mA cm− 2电流密度下表现出极高的面积容量（1.96 mAh cm− 2）和优异的循环稳定性。电极动力学分析证实了蛋黄壳Ni-Mo-Co-S NCAs/NF电极的扩散控制电池型行为。相应的全电池在1029.1 W kg− 1的功率密度下提供了92.6 Wh kg − 1的高能量密度，其中蛋黄壳Ni-Mo-Co-S NCAs/NF作为阴极电极，Bi 2 O3作为阳极电极，表明了真实的应用的潜力。该研究为实现在导电基底上直接生长多组分空心结构和复杂空心结构的高性能电化学储能材料奠定了基础。
Mixed transition metal sulfides (TMSs) with hollow and complex hollow structures have attracted intensive attentions as high-performance cathode materials for rechargeable alkaline batteries. However, these powder-based electrode materials should be further mixed with insulative polymer binders and suffered from complicate electrode fabrication process. Herein, for the first time, we demonstrate the delicate design and synthesis of the sugar gourd-like multi-component yolk-shell Ni–Mo–Co–S nanocage arrays (NCAs) on Ni foam (NF) through a facile metal-organic framework (MOF)-engaged strategy. The synthetic process includes the growth of Co-based zeolitic imidazolate framework (ZIF-67) polyhedra onto the NiMoO4·xH2O nanorod arrays (NRAs) at room temperature and followed by a sufficient sulfidation reaction. Benefiting from the intriguing structural and compositional advantages, the yolk-shell Ni–Mo–Co–S NCAs/NF binder-free electrode exhibits an extremely high areal capacity of 1.96 mAh cm−2at a current density of 5 mA cm−2and excellent cycling stability. The electrode kinetics analysis confirms the diffusion-controlled battery-type behavior of the yolk-shell Ni–Mo–Co–S NCAs/NF electrode. The corresponding full cell delivers an high energy density of 92.6 Wh kg−1at the power density of 1029.1 W kg−1with the yolk-shell Ni–Mo–Co–S NCAs/NF as cathode electrode and Bi2O3as anode electrode, indicating the potential for real applications. This work would make contribution to the realization of directly growing multi-component hollow and complex hollow structures on conductive substrate for high-performance electrochemical energy storage.