期刊
NANOMATERIALS
卷 9, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/nano9121741
关键词
silicon; graphite nanosheets; diazotization reaction; anode
类别
资金
- National Key R&D Program of China [2017YFF0210703]
- National Nature Science Foundation of China [51702157, 51707016, 51801001, 51407134, 21603103]
- China Postdoctoral Science Foundation [2017M611795, 2018T110944, 2016M590619]
- Natural Science Foundation of Colleges and Universities of Jiangsu Province in China [17KJB150022]
- Provincial Key Research and Development Program of Shaanxi [2019GY-197]
- Key Project of Baoji University of Arts and Sciences [ZK2018051]
- Natural Science Foundation of Shandong Province [ZR2019YQ24]
- Key Laboratory of Engineering Dielectrics and Its Application (Harbin University of Science and Technology), Ministry of Education [KFZ1803]
- Qingchuang Talents Induction Program of Shandong Higher Education Institution (Research and Innovation Team of Structural-Functional Polymer Composites)
Silicon/carbon (Si/C) composite has been proven to be an effective method of enhancing the electrochemical performance of Si-based anodes for lithium-ion batteries (LIBs). However, the practical application of Si/C materials in LIBs is difficult because of the weak interaction between Si and C. In this study, we applied two-step diazotization reactions to modify graphite nanosheets (GNs) and Si nanoparticles (Si NPs), yielding a stable Si-Ar-GNs composite. Owing to aryl (Ar) group bonding, Si NPs were dispersed well on the GNs. The as-prepared Si-Ar-GNs composite delivered an initial reversible capacity of 1174.7 mAhg(-1) at a current density of 100 mAhg(-1). Moreover, capacity remained at 727.3 mAhg(-1) after 100 cycles, showing improved cycling performance. This synthesis strategy can be extended to prepare other Si/C anode materials of LIBs.
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