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首页> 外文期刊>Journal of Central South University of Technology >Structural characteristics of spherical Ni(OH)_2 and its charge/discharge process mechanism
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Structural characteristics of spherical Ni(OH)_2 and its charge/discharge process mechanism

机译：球形Ni（OH）_2的结构特征及其充放电过程机理

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Spherical Ni(OH)_2 particles were prepared by an aqueous solution precipitation route. The structure of spherical Ni(OH)_2 was investigated by scanning electron microscopy and transmission electron microscopy and compared with that of traditional Ni(OH)_2. The results show that the spherical nickel hydroxide consists of Ni(OH)_2 spheres with a reticulate structure of platelet-like, which is almost arranged radially and the crystalline grains intervene and connect with each other to form a three-dimensional net. The spherical Ni(OH)_2 particle is full of pores, crannies between cleave planes. It is supposed that this structure is beneficial to the structural stability for the spherical particles during the charge/discharge processes and can improve the cycle life of the electrode; the pores and the crannies in spherical particles can shorten the proton diffusion distance and speed its velocity, which may result in that the local polarization is lowered. The electrochemical performances of the spherical Ni(OH)_2 are improved by enhancing the conducting properties of the crystalline lattice due to its quick proton diffusion.
机译：通过水溶液沉淀法制备球形Ni（OH）_2颗粒。通过扫描电子显微镜和透射电子显微镜研究了球形Ni（OH）_2的结构，并与传统的Ni（OH）_2进行了比较。结果表明，球形氢氧化镍由Ni（OH）_2球体组成，呈片状网状结构，几乎呈放射状排列，晶粒相互干预并相互连接，形成三维网。球形Ni（OH）_2颗粒充满开裂平面之间的孔和缝隙。据推测，这种结构有利于在充电/放电过程中球形颗粒的结构稳定性，并且可以改善电极的循环寿命。球形颗粒中的孔和缝隙可以缩短质子扩散距离并加快其速度，这可能导致局部极化降低。球形Ni（OH）_2的电化学性能通过增强晶格的快速质子扩散来增强其晶格的导电性能而得到改善。

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