An iron based organic framework coated with nickel hydroxide for energy storage, conversion and detection

Shuyao Jiang; Shasha Li; Yanqiu Xu; Zhejun Liu; Shuting Weng; Mengxian Lin; Yanchao Xu; Yang Jiao; Jianrong Chen

doi:10.1016/j.jcis.2021.05.014

An iron based organic framework coated with nickel hydroxide for energy storage, conversion and detection

J Colloid Interface Sci. 2021 Oct 15:600:150-160. doi: 10.1016/j.jcis.2021.05.014. Epub 2021 May 6.

Authors

Shuyao Jiang¹, Shasha Li², Yanqiu Xu¹, Zhejun Liu³, Shuting Weng², Mengxian Lin², Yanchao Xu², Yang Jiao⁴, Jianrong Chen⁵

Affiliations

¹ College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China; College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China.
² College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
³ Zhejiang Anke Environmental Protection Technology Co., Ltd, China.
⁴ College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China. Electronic address: yangjiao@zjnu.edu.cn.
⁵ College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China; College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China. Electronic address: cjr@zjnu.cn.

PMID: 34010772
DOI: 10.1016/j.jcis.2021.05.014

Abstract

Although electrode materials based on metal organic frameworks (MOFs) were widely studied in the electrochemistry field, the origin of poor conductivity is still a bottleneck restricting their development. Herein, we constructed a conductive circuit by growing a layer of hydroxide on the surface of the Fe-MOF, and composite materials (Fe-MOF@Ni(OH)₂) are applied in the fields of supercapacitor, OER, and electrochemical sensing. Fe-MOF@Ni(OH)₂ not only maintains the intrinsic advantages of Fe-MOF, but also improves the electrical conductivity. Fe-MOF@Ni(OH)₂ exhibits a high specific capacity of 188 mAh g^-1 at 1 A g^-1 . The energy density of the asymmetric supercapacitor (Fe-MOF@Ni(OH)₂-20//AC) reaches 67.1 Wh kg^-1. During the oxygen evolution reaction, the overpotential of the material is 280 mV at 10 mA cm^-2, and the Tafel slope is 37.6 mV dec^-1. The electrochemical sensing tests showed the detection limit of BPA is 5 μM. Hence, these results provide key insights into the design of multifunctional electrode materials.

Keywords: Electrochemical sensor; Hydroxide; Metal-organic frameworks; OER; Supercapacitor.