Cao Yingying, Lu Yidong, Ang Edison Huixiang, Geng Hongbo, Cao Xueqin, Zheng Junwei, Gu Hongwei
Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, China.
Nanoscale. 2019 Aug 15;11(32):15112-15119. doi: 10.1039/c9nr05504e.
The rational-design and synthesis of transition-metal compounds with outstanding electrochemical activity and durability for renewable energy systems have attracted tremendous research interest in recent years. Herein, we report a facile and unique strategy to synthesize N-doped carbon nanotube-encapsulated Ni nanoparticles on reduced graphene oxide (Ni@NC-rGO). The optimized nanostructure determines the synergetic effects among the Ni nanoparticles, N-doped CNTs and graphene nanosheets, thus resulting in extraordinary electrochemical performances. When applied as an anode for lithium-ion batteries (LIBs), the Ni@NC-rGO electrode displayed high reversible capacity, stable cycling performance and superior rate capability. Moreover, the resulting Ni@NC-rGO nanocomposites exhibited low overpotential and considerable durability for the hydrogen evolution reaction (HER). Our study may provide a feasible methodology for the preparation of high-performance nanostructured materials for practical energy storage and conversion applications.
近年来，具有出色电化学活性和耐久性的过渡金属化合物的合理设计与合成在可再生能源系统中引起了巨大的研究兴趣。在此，我们报道了一种简便且独特的策略，用于在还原氧化石墨烯（Ni@NC-rGO）上合成氮掺杂碳纳米管包裹的镍纳米颗粒。优化后的纳米结构决定了镍纳米颗粒、氮掺杂碳纳米管和石墨烯纳米片之间的协同效应，从而产生了非凡的电化学性能。当用作锂离子电池（LIBs）的阳极时，Ni@NC-rGO电极表现出高可逆容量、稳定的循环性能和优异的倍率性能。此外，所得的Ni@NC-rGO纳米复合材料在析氢反应（HER）中表现出低过电位和相当高的耐久性。我们的研究可能为制备用于实际能量存储和转换应用的高性能纳米结构材料提供一种可行的方法。
