Wi Sungun, Woo Hyungsub, Lee Sangheon, Kang Joonhyeon, Kim Jaewon, An Subin, Kim Chohui, Nam Seunghoon, Kim Chunjoong, Park Byungwoo
WCU Hybrid Materials Program, Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 151-744 South Korea.
School of Materials Science and Engineering, Chungnam National University, Daejeon, 305-764 South Korea.
Nanoscale Res Lett. 2015 May 1;10:204. doi: 10.1186/s11671-015-0902-7. eCollection 2015.
The reduced graphene oxide (RGO)/carbon double-coated 3-D porous ZnO aggregates (RGO/C/ZnO) have been successfully synthesized as anode materials for Li-ion batteries with excellent cyclability and rate capability. The mesoporous ZnO aggregates prepared by a simple solvothermal method are sequentially modified through distinct carbon-based double coating. These novel architectures take unique advantages of mesopores acting as space to accommodate volume expansion during cycling, while the conformal carbon layer on each nanoparticle buffering volume changes, and conductive RGO sheets connect the aggregates to each other. Consequently, the RGO/C/ZnO exhibits superior electrochemical performance, including remarkably prolonged cycle life and excellent rate capability. Such improved performance of RGO/C/ZnO may be attributed to synergistic effects of both the 3-D porous nanostructures and RGO/C double coating.
还原氧化石墨烯（RGO）/碳双包覆三维多孔氧化锌聚集体（RGO/C/ZnO）已成功合成，作为锂离子电池的负极材料，具有出色的循环稳定性和倍率性能。通过简单的溶剂热法制备的介孔氧化锌聚集体，通过独特的碳基双包覆依次进行改性。这些新颖的结构具有独特的优势，介孔作为空间可容纳循环过程中的体积膨胀，而每个纳米颗粒上的保形碳层缓冲体积变化，导电的RGO片层将聚集体相互连接。因此，RGO/C/ZnO表现出优异的电化学性能，包括显著延长的循环寿命和出色的倍率性能。RGO/C/ZnO性能的提升可能归因于三维多孔纳米结构和RGO/C双包覆的协同效应。
