A reduced graphene oxide–NiO composite electrode with a high and stable capacitance†,Sustainable Energy & Fuels

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A reduced graphene oxide–NiO composite electrode with a high and stable capacitance†
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2017-12-18 00:00:00 , DOI: 10.1039/c7se00420f
Xiaoming Sun _{1,

2,

3,

4} , Hao Lu _{1,

2,

3,

4} , Peng Liu _{1,

2,

3,

4} , Thomas E. Rufford _{1,

2,

3,

4} , Rohit R. Gaddam _{1,

2,

3,

4} , Xin Fan _{1,

2,

3,

4} , X. S. Zhao _{1,

2,

3,

4}

Affiliation

We report a vacuum-thermal strategy for the preparation of a composite electrode material consisting of reduced graphene oxide and nickel oxide nanoparticles, which displays interesting electrocapacitive properties. Graphene oxide thermally expands in a vacuum and simultaneously nickel(II) acetylacetonate decomposes to form NiO nanoparticles between graphene layers. This method not only allows the uniform dispersion of NiO nanoparticles between graphene layers but also enables simultaneous reduction of graphene oxide. The structural and electrochemical advantages of both reduced graphene oxide and nanoscale NiO particles are maintained. The reduced graphene oxide–NiO composite exhibits a specific capacitance of 880 F g⁻¹ at a current density of 1 A g⁻¹ in 6 M KOH and a 93.1% retention of initial capacitance after 5000 cycles at 5 A g⁻¹.

中文翻译：

还原的氧化石墨烯-NiO复合电极，具有高且稳定的电容†

我们报告了一种真空热策略，用于制备由还原的氧化石墨烯和氧化镍纳米粒子组成的复合电极材料，该复合电极材料显示出有趣的电电容特性。氧化石墨烯在真空中热膨胀，同时乙酰丙酮镍（II）分解，从而在石墨烯层之间形成NiO纳米粒子。该方法不仅允许NiO纳米颗粒在石墨烯层之间均匀分散，而且能够同时还原氧化石墨烯。保留了还原的氧化石墨烯和纳米级NiO颗粒的结构和电化学优势。还原的氧化石墨烯-NiO复合材料在1 A g ^-1的电流密度下具有880 F g ^-1的比电容在5 M g ^-1下经过5000次循环后，其在6 M KOH中的溶解度和93.1％的初始电容保持率。

更新日期：2017-12-18

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