Carbothermal conversion of siloxene sheets into silicon-oxy-carbide lamellae for high-performance supercapacitors

被引：69

作者：

Pazhamalai, Parthiban ^{[1
]}

Krishnamoorthy, Karthikeyan ^{[1
]}

Sahoo, Surjit ^{[1
]}

Mariappan, Vimal Kumar ^{[1
]}

Kim, Sang-Jae ^{[1
,2
]}

机构：

[1] Jeju Natl Univ, Fac Appl Energy Syst, Nanomat & Syst Lab, Major Mechatron Engn, Jeju 63243, South Korea

[2] Jeju Natl Univ, Dept Adv Convergence Sci & Technol, Jeju 63243, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2020年 / 387卷

基金：

新加坡国家研究基金会;

关键词：

Silicon-oxy-carbide; Carbothermal reaction; Siloxene sheets; Symmetric supercapacitor; Power density; REDUCED GRAPHENE OXIDE; ENERGY-STORAGE; ELECTRODE MATERIALS; OXYCARBIDE; CARBON; NANOPARTICLES; CAPACITANCE; NANOSHEETS; MXENE; ANODE;

D O I：

10.1016/j.cej.2019.123886

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This work describes the carbothermal preparation of silicon-oxy-carbide (SiOC) lamellae using two-dimensional siloxene sheets and alginic acid as precursors. X-ray photoelectron spectra, X-ray diffraction, Fourier-transform infrared spectra, high-resolution transmission electron micrographs, and Raman spectra revealed the formation of lamella-like SiOC nanostructures. Symmetric supercapacitors (SSCs) were fabricated using SiOC nanostructures as electrodes and evaluated in aqueous (1 M Li2SO4) and organic (1 M TEABF(4)) electrolytes. SiOC SSC fabricated with Li2SO4 electrolyte operated over a voltage window of 2.0 V, with an energy density of 14.2 Wh kg(-1) and a power density of 6666 W kg(-1). SiOC SSC fabricated using TEABF(4) electrolyte operates over a voltage window of 3.0 V and delivered a device capacitance of about 16.71 F g(-1), energy density of 20.89 Wh kg(-1), with excellent cyclic stability and superior rate capability. Strikingly, the high-power density of the TEABF(4)-based SiOC SSC (15,000 W kg(-1)) reached the required power target for next-generation electric vehicles and is suitable for high-performance supercapacitor devices.

引用

页数：8

共 72 条

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