Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6608158 | Electrochimica Acta | 2016 | 8 Pages |
Abstract
Ni(OH)2 microspheres composed of intersected nanopetals are hydrothermally produced using NH4F as the morphology directing agent. The amount of NH4F can not only affect the morphology of Ni(OH)2, but also the microstructure and pore size. Through rational control of the NH4F dosage, Ni(OH)2 microspheres with macro/mesoporous structure are obtained. The 3D hierarchical structure can not only increase the diffusion rate of electrolyte into the inner part of active materials, but also reduce the diffusion distance to the interior surface. The sample displays a maximum discharge specific capacity of 1280.9Â FÂ gâ1 at 0.5Â AÂ gâ1 and 655.2Â FÂ gâ1 at 10Â AÂ gâ1 in 2Â M KOH. The capacity loss is only 2% after 700 cycles.
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Authors
Hongmei Du, Yijing Wang, Huatang Yuan, Lifang Jiao,