石墨烯
材料科学
氢氧化物
化学工程
纳米复合材料
镍
氧化物
碱性电池
复合数
电池(电)
纳米技术
复合材料
冶金
功率(物理)
工程类
物理
量子力学
作者
Wenxiu He,Yuanyi Zhu,Jing Meng,Bin Liu,Yongqiang Zhang
摘要
The β-nickel hydroxide/reduced graphene oxide (β-Ni(OH)2/RGO) nanocomposites were successfully synthesized by the microwave-assisted method. The as-obtained samples are composed of β-Ni(OH)2 nanoplates deposited homogeneously on the surfaces of the RGO layer. The discharge capacity of the β-Ni(OH)2/RGO composite decreases from 316.3 to 259.9 mA h/g at the discharge rate from 0.2 to 10 C, and the capacity decreases slightly by 17.8%. The excellent capacity and rate capability are assigned to the well-defined nanocrystallinity of the disorder hexagonal β-Ni(OH)2 nanoplates growing and anchoring on the surface of the RGO layer with the most numerous of available active sites, which provide more comfort spaces for protons and ions. The superior capacity of pseudocapacitive β-Ni(OH)2 and good conductivity of RGO make the β-Ni(OH)2/RGO composites a promising battery-type material for high-performance alkaline rechargeable batteries.
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