SnO2 nanoparticles confined in a graphene framework for advanced anode materials
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- SnO2 nanoparticles confined in a graphene framework for advanced anode materials
- Hwang, Yun-Hwa; Bae, Eun Gyoung; Sohn, Kee-Sun; Shim, Sangdeok; Song, Xiaokai; Lah, Myoung Soo; Pyo, Myoungho
- Charge-discharge cycle; Framework; Individual nanoparticles; Li-ion batteries; Lithium-ion battery; Particle size and morphologies; Rate performance; Reduced graphene oxides
- Issue Date
- ELSEVIER SCIENCE BV
- JOURNAL OF POWER SOURCES, v.240, no., pp.683 - 690
- SnO2 nanoparticles (SNPs) entrapped in a graphene framework are synthesized for use as an anode material in Li ion batteries. A framework is prepared by covalently linking SNPs-anchored graphene oxide layers with diboronic acids. The framework provides the SNPs with more effective buffering than thermally reduced graphene oxide. SNPs in a graphene framework maintain the initial particle size and morphology after repeated charge-discharge cycles, with no inter-particle aggregation. The volume increase of the composite, accompanied by Li+ insertion into SNPs, is also significantly suppressed. The isolation of an individual nanoparticle and the firmness of a framework, which are ascribed to densely cross-linked graphene layers, results in better cyclability and rate performance by comparison with thermally reduced SNPs-anchored graphene oxide.
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