期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 38, 页码 32756-32766出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b09866
关键词
N,S-rGO/WSe2/NiFe-LDH; hybrid aerogel; 3D structure; overall water splitting; supercapacitors
资金
- China Postdoctoral Science Foundation [2016M600284]
High-performance active materials for energy-storage and energy-conversion applications require a novel class of electrodes: ones with a structure conducive to conductivity, large specific surface area, high porosity, and mechanical robustness. Herein, we report the design and fabrication of a new ternary hybrid aerogel. The process entails an in situ assembly of 2D WSe2 nanosheets and NiFe-LDH nanosheets on a 3D N,S-codoped graphene framework, accomplished by a facile hydrothermal method and electrostatic self-assembly technology. The obtained nanocomposite architecture maximizes synergistic effects among its three 2D-layer components. To assess the performance of this hybrid material, we deployed it as an advanced electrode in overall water splitting and in a supercapacitor. Results in both scenarios attest to its excellent electrochemical properties. Specifically, serving as a catalyst in an oxygen evolution reaction, our nanocomposite requires overpotentials of 1.48 and 1.59 V to obtain current densities of 10 and 100 mA cm(-2), respectively. The hybrid material also efficiently electrocatalyzes hydrogen evolution reactions in base solution, necessitating overpotentials of 50 and 237 mV for current densities of 1.0 and 100 mA cm(-2), respectively. The 3D hybrid, when applied to a symmetric supercapacitor device, achieves 125.6 F g(-1) capacitance at 1 A g(-1) current density. In summary, our study elucidates a new strategy to maximize efficiency via synergetic effects that is likely applicable to other 2D materials.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据