Sea urchin-like CoNi2S4 materials derived from nickel hexamyanocobaltate for high-performance asymmetric hybrid supercapacitor. (26th November 2022)

• Record Type: Journal Article
• Authors: Wu, Shang; Xu, Xin; Yan, Xiangtao; Zhao, Huanlei; Liu, Chaoyang; Wang, Yanbin; Su, Qiong; Yin, Fenping; Yang, Quanlu
• Is Part Of: Nanotechnology. Volume 33:Number 48(2022)
• Publication Date: 2022-11-26
• Subjects: Prussian blue analogues -- metal sulphides -- carbon nanospheres -- asymmetric supercapacitors; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ac7fa6
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: In this work, a mild chemical precipitation method and simple hydrothermal treatment of the nickel hexamyanocobaltate precursor strategy are developed to prepare a sea urchin-like CoNi2 S4 compound with remarkable specific capacity and excellent cycling stability. The prepared CoNi2 S4 has an outstanding specific capacity of 149.1 mA h g −1 at 1 A g −1 and an initial capacity of 83.1% after 3000 cycles at 10 A g −1 . Moreover, the porous carbon nanospheres (PCNs) with exhibit cycling stability (94.7% of initial specific capacity after 10 000 cycles at 10 A g −1 ) are selected as negative electrode to match CoNi2 S4 positive electrode for assembly of CoNi2 S4 //PCNs asymmetric supercapacitor (ASC). Satisfactorily, the as-assembled CoNi2 S4 //PCNs ASC exhibits an impressive energy density of 41.6 Wh kg −1 at 797 W kg −1, as well as the suitable capacity retention of 82.8% after 10 000 cycles. The superior properties of the device demonstrated that the as-prepared material is potential energy storage material.