新型炭材料（中英文）2025，Vol.40Issue(6)：1304-1318,15.DOI:10.1016/S1872-5805(25)60968-1
用于高性能锂离子电池的三明治状石墨烯/硅/石墨烯复合材料
A sandwich rGO/Si/rGO material as a high-performance anode material for lithium-ion batteries
摘要
Abstract
Silicon-based materials have attracted consider-able attention as potential anodes in lithium-ion energy stor-age systems,primarily due to their having a theoretical capa-city greater than conventional graphite anodes.Despite this advantage,the inherent problem of substantial volume changes during lithiation/delithiation severely hinders their practical implementation in commercial battery configura-tions.We report the synthesis of a material by an electrostat-ic self-assembly method in which citric acid(CA)serves as a crosslinker to anchor cetyltrimethylammonium bromide-modified positively charged silicon nanoparticles between graphene oxide(GO)layers.After freeze-drying and thermal treatment under a nitrogen atmosphere,silicon particle core layers sandwiched between reduced graphene oxide(rGO)layers were obtained.Con-trol samples with Si/rGO mass ratios of 0.5,1 and 2 were prepared for evaluation.The continuous conductive rGO network sig-nificantly increased the electronic conductivity of the material and the incorporation of CA acted as a binding agent between the Si and the rGO which increased the structural stability.By anchoring the silicon particles between adjacent rGO layers,the abundant void spaces and favorable mechanical flexibility of rGO were harnessed to effectively alleviate the volume expansion of silicon during charge-discharge cycles.The material with the Si/rGO mass ratio of 1 gave the highest specific capacity of 946.6 mAh g-1 after 200 cycles at a current density of 0.5 A g-1.It also had a good rate performance,with a good reversible ca-pacity of 1005.1 mAh g-1 at a high current density of 2 A g-1.关键词
锂离子电池/还原氧化石墨烯/三明治结构/硅负极Key words
Lithium-ion batteries/Reduced graphene oxide/Sandwich structure/Silicon anode分类
化学化工引用本文复制引用
LI Shu-chun,ZHU Shuai-bo,MA Cheng,WANG Ji-tong,QIAO Wen-ming,ZHANG Yin-xu..用于高性能锂离子电池的三明治状石墨烯/硅/石墨烯复合材料[J].新型炭材料（中英文）,2025,40(6):1304-1318,15.基金项目
This work is partly supported by the National Natural Science Foundation of China(22178107,U21A2060),and Xinjiang Uygur Autonomous Re-gion Key Research and Development Program(2022B01030). 国家自然科学基金(22178107,U21A2060) （22178107,U21A2060）
新疆维吾尔自治区重点研发计划(2022B01030). （2022B01030）
