Enhanced electrochemical supercapacitors from metal silicates (Zn, Mn, Ni and Co) by multi-step treatment of natural green algae

Abstract

Metal silicates (Zn, Mn, Ni and Co) were synthesized from natural green algae (GAs) as supercapacitor electrodes. In this study, a multi-step treatment with two kinds of porogens was used to produce a larger specific surface area and more abundant hierarchical pores. Firstly, GAs were treated with 1.0 M NaCl solution to prepare large pores. Secondly, metal silicates were synthesized from GAs using a hydrothermal reaction. Lastly, the as-synthesized samples were soaked in 3.0 M NaOH solution to obtain the products (m-C-MSi, M = Zn, Mn, Ni and Co). Compared with the composites without multi-step treatment, the synthetic materials in this research possess excellent electrochemical properties both as electrodes and as HSCs. This work proved that the multi-step treatment with porogens is an effective method to enhance the electrochemical performance of metal-silicate supercapacitors.

Graphical abstract: Enhanced electrochemical supercapacitors from metal silicates (Zn, Mn, Ni and Co) by multi-step treatment of natural green algae

Supplementary files

Article information

Article type
Paper
Submitted
20 Jun 2024
Accepted
02 Sep 2024
First published
03 Sep 2024

New J. Chem., 2024, Advance Article

Enhanced electrochemical supercapacitors from metal silicates (Zn, Mn, Ni and Co) by multi-step treatment of natural green algae

S. Zhang, A. Wang, G. Zhang, A. Mei, T. Lv, X. Wang and H. Jiang, New J. Chem., 2024, Advance Article , DOI: 10.1039/D4NJ02813A

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