Three-dimensional nitrogen-doped rGO-siloxene nanocomposite anode for Li-ion storage

被引：9

作者：

Alomari, Suaad A. ^{[1
,2
,3
]}

Dubal, Deepak P. ^{[1
,2
]}

MacLeod, Jennifer ^{[1
,2
]}

Motta, Nunzio ^{[1
,2
]}

机构：

[1] Queensland Univ Technol, Sch Chem & Phys, 2 George St, Brisbane, Qld 4000, Australia

[2] Queensland Univ Technol, Ctr Mat Sci, 2 George St, Brisbane, Qld 4000, Australia

[3] Umm Al Qura Univ, Al Lith Univ Coll, Dept Phys, Mecca, Saudi Arabia

来源：

APPLIED SURFACE SCIENCE | 2023年 / 624卷

基金：

澳大利亚研究理事会;

关键词：

Li -ion storage; N-doped rGO; Siloxene; Anode; PERFORMANCE LITHIUM-ION; ELECTRICAL-CONDUCTIVITY; LAYERED SILICON; GRAPHENE; TEMPERATURE; NANOSHEETS; ELECTRODES; SURFACE;

D O I：

10.1016/j.apsusc.2023.157099

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, we synthesize a 3D nitrogen-doped rGO (NrGO)-siloxene aerogel nanocomposite using a simple and low-cost hydrothermal process and demonstrate its use as an anode material for lithium-ion storage. The meso- macroporous structure of the N-doped rGO (NrGO) aerogel enhances the electrical conductivity and accom-modates the volume expansion of siloxene sheets during cycling. Thereby, the NrGO-siloxene (NGSil) composite shows improved kinetics and structural stability resulting in an excellent reversible discharge capacity of 472.07 mA h g(-1) at 0.1 A g(-1), which is higher than those of the hydrothermally treated siloxene (HT-Sil, 31.59 mA h g(-1)) and the undoped rGO-siloxene (GSil, 296.33 mA h g(-1)). Moreover, the NGSil composite exhibits a good rate performance (177 mA h g(-1) at 6 A g(-1)), and excellent long-term cycling stability (243.12 mA h g(-1) after 1000 cycles) with a steady coulombic efficiency of 99.5% at 1 A g(-1).

引用

页数：9

共 67 条

[1] From scaled-up production of silicon-graphene nanocomposite to the realization of an ultra-stable full-cell Li-ion battery [J].