Au&Co core-shell nanoparticles capped with porous carbon: High performance materials for supercapacitor applications

作者：Li, Xiang; Wei, Fuxiang^*; Sui, Yanwei^*; Qi, Jiqiu; He, Yezeng; Meng, Qingkun

来源：Materials Letters, 2016, 183: 408-412.

DOI：10.1016/j.matlet.2016.07.145

• Core-shell
• Nanocompo sites
• X-ray techniques
• Porous carbon

In this article we synthesized the gold and cobalt bimetal -porous carbon (Au&Co@C) composite material in core-shell structure with Au@ZIF-67 (Co(MeIM)(2), MelM=2-methylimidazole) as a precursor by a thermal decomposition method. The gold and cobalt bimetal nanoparticles (Au&Co) obtained at about 15 nm in size were anchored on carbon homogeneously. The specific capacitance of the composite material was up to 568 F g(-1) at a current density of 1 A g(-1) in 1.0 M KOH electrolyte. More significantly, the specific capacitance retention rate was 97.1% at a current density of 20 A g(-1) after 1000 cycles. All the results indicated that Au82Co@C composite material was a promising one for supercapacitors.

• 单位
  中国矿业大学（北京）