Journal of Inorganic Materials, Volume. 34, Issue 7, 703(2019)
Manganese doped Ni1-xMnx(OH)2 (x=0.1, 0.2, 0.3, 0.4) was prepared by buffer solution method. X-ray diffraction (XRD) measurements show that the samples are mainly composed of β-Ni(OH)2 with little amount of Mn3O4 phase. Cyclic voltammetry results show that the integral area of reduction peak of Ni0.8Mn0.2(OH)2 is the largest among the samples. The constant current charge-discharge tests show that the discharge capacity of Ni0.8Mn0.2(OH)2 reaches 271.8 mAh/g at the current density of 100 mA/g, which is higher than that of other samples and commercial β-Ni(OH)2 (253.6 mAh/g). At the current density of 300 and 500 mA/g, Ni0.8Mn0.2(OH)2 remains the highest discharge capacity of 294.7 and 291.5 mAh/g, respectively. Moreover, the cycling stability of Ni1-xMnx(OH)2 is superior to commercial β-Ni(OH)2. All data indicate that Mn doped Ni(OH)2 can improve the capacity and cycling stability of nickel electrodes, and greatly reduce the cost of nickel electrodes.
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Min XIAO, Ru-Yue XING, Shou-Guang YAO, Jie CHENG, Ya-Ju SHEN, Yu-Sheng YANG.
Category: RESEARCH PAPER
Received: Sep. 20, 2018
Accepted: --
Published Online: Sep. 26, 2021
The Author Email: YAO Shou-Guang (zjyaosg@126.com)