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首页> 外文期刊>Electrochimica Acta >Highly ordered 1D NiCo2O4 nanorods on graphene: An efficient dualfunctional hybrid materials for electrochemical energy conversion and storage applications
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Highly ordered 1D NiCo2O4 nanorods on graphene: An efficient dualfunctional hybrid materials for electrochemical energy conversion and storage applications

机译:石墨烯上有高度有序的1D Nico2O4纳米棒:用于电化学能量转换和储存应用的高效双功能混合材料

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摘要

One dimensional porous binary metal oxides exert much more attention for electrochemical energy conversion and storage applications. Herein, we report a simple process for the synthesis of one dimensional mesoporous rod-like NiCo2O4 structure (NCO NRs) grown on reduced graphene oxide sheets (RG/NCO NCs). This noble metal free RG/NCO NCs composite manifested as the dual-functional electrode material for the electrochemical oxygen evolution reaction (OER) and supercapacitor applications. The RG/NCO NCs shows significant OER performance with prosperous reaction kinetics with a smaller Tafel slope of 35 mV dec(-1). It requires only 313 mV overpotential to deliver 10 mA cm(-2) current density, showing superior OER activity compared to some of the state-of-art electrocatalysts under similar electrochemical conditions. Moreover, the RG/NCO NCs showed enhanced energy storage efficacy in terms of higher specific capacitance (1315 F g(-1)), long-term operational durability, higher specific energy and power output. The porous structure, higher specific surface area and better electrochemical conductivity of the RG/NCO NCs make it a suitable material for both the energy conversion and storage application. Additionally, to validate the supercapacitor performance, a prototype device in coin cell configuration has been designed and successfully tested to power a LED. (C) 2018 Elsevier Ltd. All rights reserved.
机译:一种尺寸多孔二元金属氧化物对电化学能量转换和储存应用产生更多的关注。在此,我们报告了在氧化物氧化物片(RG / NCO NCS)上生长的一维中孔棒状NiCO2O4结构(NCO NRS)的简单方法。该贵金属无金属RG / NCO NCS复合材料表现为用于电化学氧气进化反应(OER)和超级电容器应用的双功能电极材料。 RG / NCO NCS显示出具有繁荣反应动力学的显着oer性能,具有较小的Tafel斜率为35 mV Dec(-1)。它仅需要313 mV过电位来提供10 mA cm(-2)电流密度,而在类似的电化学条件下与一些最先进的电催化剂相比,呈卓越的OER活动。此外,RG / NCO NCS在更高的特定电容(1315V(-1)),长期操作耐久性,更高的特定能量和功率输出方面显示了增强的能量储存功效。多孔结构,较高的比表面积和RG / NCO NCS的更好的电化学电导率使其成为能量转换和储存应用的合适材料。此外,为了验证超级电容器性能,设计并成功测试了硬币单元配置中的原型设备以为LED供电。 (c)2018年elestvier有限公司保留所有权利。

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