Bi-interface induced multi-active MCo2O4@MCo2S4@PPy (M=Ni, Zn) sandwich structure for energy storage and electrocatalysis
Bi-interface induced multi-active MCo2O4@MCo2S4@PPy (M=Ni, Zn) sandwich structure for energy storage and electrocatalysis
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DOI：
10.1016/j.nanoen.2018.12.066
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发表时间：
2019-03
期刊：
影响因子：
17.6
通讯作者：
Depeng Zhao;Henqi Liu;Xiang Wu
中科院分区：
文献类型：
--
作者：
Depeng Zhao;Henqi Liu;Xiang Wu
合理的界面剪裁是开发出理想的储能电极材料和OER电催化剂的重要而有效的策略。本工作通过简单的溶液法制备了MCo2O4@MCo2S4@PPy三明治结构。合成的产物可直接用作混合电容器的电极材料，在1Ag 1下的比容为835.2−C g−1，循环10000次后的保持率为90.07%，表明该产品的双界面比单一界面能激发更多的活性中心。在电流密度为100mA cm 2时，其过电势为298 mV，在电流密度为100mA cm−2时，过电势为395mV。合成的产物可直接用作混合电容器和电催化剂的电极材料。
Rational interface tailoring of nanomaterials is a significant and efficient strategy to develop the desired electrode materials for energy storage and electrocatalysts for OER. In this work, the MCo2O4@MCo2S4@PPy sandwich structures are prepared through a simple solution approach. The as-synthesized products can be utilized directly for the electrode materials of hybrid capacitor, which delivers a specific capacitance of 835.2 C g−1at 1 A g−1and a retention rate of 90.07% after 10000 cycles, revealing that bi-interface of the product can motivate more active sites than single interface. Moreover, the sandwich structured product also exhibit low overpotential of 298 mV at 50 mA cm−2and 395 mV at current density of 100 mA cm−2.In this work, the MCo2O4@MCo2S4@PPy sandwich structures are prepared through a facile solution route. The as-synthesized products can be used directly as the electrode materials for hybrid capacitor and electrocatalyst.