Journal
INORGANIC CHEMISTRY FRONTIERS
Volume 8, Issue 18, Pages 4282-4290Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1qi00778e
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Funding
- National Natural Science Foundation of China [21871164]
- Taishan Scholar Project Foundation of Shandong Province [ts20190908]
- Natural Science Foundation of Shandong Province [ZR2019MB024]
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SiO based materials have been developed with carbon coated SiO nanoparticles embedded in N-doped carbon nanosheets, showing excellent volume expansion suppression. The material exhibits stable reversible capacity and good rate performance at high cycle numbers, demonstrating potential as a promising anode for high capacity LIBs.
SiO based materials have attracted attention as promising anodes for lithium-ion batteries (LIBs) with high energy density. However, severe volume variation and poor conductivity limit the development of SiO based materials. In this study, carbon coated SiO nanoparticles embedded in N-doped carbon nanosheets (SiO@C/CNSs) have been fabricated through simple ball milling followed by annealing treatment, which is facile and scalable. The g-C3N4 precursor plays a multifunctional role as a sacrificial template, nitrogen source for doping, and minor carbon source. The presence of N-doped porous carbon nanosheets could minimize the volume expansion, enhance the reaction kinetics and retain the integrity of the electrode. The SiO@C/CNS anode exhibits a stable reversible capacity of 690 mA h g(-1) up to 400 cycles at 1 A g(-1) and excellent rate capability. The SiO@C/CNS//LiFePO4 full cell further confirms its potential as a promising anode for high capacity LIBs.
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