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为开发高容量、高循环性能镍氢电池,分别使用共沉淀法和固相沉淀转化法,合成了微米级球形氢氧化镍和纳米级氢氧化镍,并对其结构、形貌以及电化学性能进行了对比研究.XRD谱图分析、充放电以及循环伏安测试结果表明,纳米级氢氧化镍比微米级球形氢氧化镍具有更高的电化学活性,而微米级球形氢氧化镍在可逆性、电极循环寿命方面比纳米级氢氧化镍具有更为优越的性能.纳米级氢氧化镍与微米级球形氢氧化镍掺杂使用可收到较好的效果.当纳米级氢氧化镍以质量分数为8%与微米级氢氧化镍掺杂使用时,放电容量提高了约9.6%,同时电极循环性能也得到了一定提高.
In order to develop high capacity and high cycle performance NiMH batteries, the microspherical nickel hydroxide and nano nickel hydroxide were synthesized by coprecipitation method and solid phase precipitation method respectively. Their structures, morphology and electrochemical properties The results of XRD, charge and discharge and cyclic voltammetry show that nano-sized nickel hydroxide has higher electrochemical activity than that of micro-sized spherical nickel hydroxide, , The electrode cycle life than the nano-nickel hydroxide has more superior performance.Nano-nickel hydroxide and micron-sized spherical nickel hydroxide doping can receive better results.When the nano-nickel hydroxide in mass fraction When doping with 8% and micron nickel hydroxide, the discharge capacity increased by 9.6%, and the cycling performance of the electrode was also improved.