Three-Dimensional Carbon-Coated SnO2/Reduced Graphene Oxide Foam as a Binder-Free Anode for High-Performance Lithium-Ion Batteries
Three-Dimensional Carbon-Coated SnO2/Reduced Graphene Oxide Foam as a Binder-Free Anode for High-Performance Lithium-Ion Batteries
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三维碳包覆 SnO2/还原氧化石墨烯泡沫作为高性能锂离子电池的无粘合剂阳极
DOI：
10.1002/celc.201600128
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发表时间：
2016
期刊：
影响因子：
4
通讯作者：
Zhang Lulu
中科院分区：
文献类型：
--
作者：
Tao Huachao;Zhu Shouchao;Xiong Lingyun;Yang Xuelin;Zhang Lulu
以葡萄糖为碳源和交联剂，采用水热-冷冻干燥法制备了三维碳包覆SnO 2/还原氧化石墨烯（SnO 2/RGO/C）泡沫材料。该泡沫作为锂离子电池的独立阳极，具有大容量和优异的循环稳定性（在100 mA g−1下130次循环后为717 mAh g − 1）。 其优异的电化学性能可能与纳米级高容量SnO 2、RGO优异的电子导电性和大的比表面积以及碳包覆层之间的协同效应有关，这可以增强SnO 2纳米颗粒和RGO纳米片的结合强度，保持结构完整性，提高电子导电性。SnO 2与RGO之间的强相互作用、高电子电导率以及复合材料的多孔结构导致作为锂离子电池的无粘合剂阳极的高电化学活性和稳定的循环性能。
A three‐dimensional carbon‐coated SnO2/reduced graphene oxide (SnO2/RGO/C) foam has been prepared by using glucose as the carbon source and cross‐linking agent through a one‐step hydrothermal process followed by freeze drying. The foam, as a free‐standing anode for lithium‐ion batteries, exhibits a large capacity and excellent cycling stability (717 mAh g−1after 130 cycles at 100 mA g−1). The outstanding electrochemical performance could be related to the synergistic effect between the nano‐sized high‐capacity SnO2, the excellent electronic conductivity and large specific surface area of RGO, and the carbon coating layer, which could enhance the bonding strength of SnO2nanoparticles and RGO nanosheets, keep the structural integrity, and increase the electronic conductivity. The strong interaction between SnO2and RGO, the high electronic conductivity, and the porous structure of the composite result in high electrochemical activity and stable cycling performance as a binder‐free anode for lithium‐ion batteries.