| 锌镍单液流电池正极Ni1-xMnx(OH)2倍率性能分析 | |
| Rate Performance Analysis of Ni1-xMnx(OH)2 as Cathode Material for Zinc-Nickel Single Flow Battery | |
| 摘要: 采用缓冲溶液法制备Mn掺杂Ni1-xMnx（OH）2（x=0.1，0.2，0.3，0.4）。X射线衍射（XRD）测试表明x=0.1和0.2的样品主要是由β相组成；扫描电子显微镜（SEM）和氮气吸附-脱附测试表明掺杂Mn样品比不掺Mn的商用β-Ni（OH）2的颗粒更细小、多孔；恒流充放电测试表明，这种电极具有优良的高倍率性能，当x=0.2，电流密度800 mA·g-1时放电比容量为288.8 mAh·g-1，同等条件测试的商用β-Ni（OH）2放电比容量为198.7 mAh·g-1，循环580圈后仍有276 mAh·g-1的放电比容量，其衰减率为4.1%，而同等测试条件下的其它4种样品衰减率分别为46.1%（商用β-Ni（OH）2）、13.0%（x=0.1）、25.6%（x=0.3）、34.1%（x=0.4），可见这种Mn掺杂电极材料适合大电流密度充放电，能够改善镍电极的循环稳定性，降低镍电极成本。 | |
| 关键词: 缓冲溶液法 Ni1-xMnx(OH)2 倍率性能 循环稳定性 | |
| 基金项目: 国家自然科学基金（No.51776092）资助项目。 | |
| Abstract: 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 showed that the samples were mainly composed of β phase when x=0.1 and 0.2. Scanning electron microscopy (SEM) measurements and nitrogen adsorption-desorption showed that the Mn doped samples were finer and more porous than commercial β-Ni(OH)2 samples without Mn. The constant current charge-discharge tests show that the material of Ni0.8Mn0.2(OH)2 exhibited a high specific discharge capacity of 288.8 mAh·g-1 at 800 mA·g-1 when the specific discharge capacity of commercial β-Ni(OH)2 was 198.7 mAh·g-1. In addition, the electrodes have excellent cycle performance. When the Mn content x is 0.2, the material maintained a specific discharge capacity of 276 mAh·g-1 after circulating 580 cycles at 800 mA·g-1 with an attenuation rate of 4.1%, the attenuation rates of the others were 46.1% (commercial β-Ni(OH)2), 13.0% (x=0.1), 22.6% (x=0.3) and 34.1% (x=0.4). This indicated that Mn doped Ni(OH)2 can improve the cycling stability of nickel electrodes at high current density, and greatly reduce the cost of nickel electrodes. | |
| Keywords: buffer solution method Ni1-xMnx(OH)2 rate performance cyclic stability | |
| 投稿时间：2019-03-30 修订日期：2019-06-30 | |
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| 姚寿广,窦飞,邢如月,程杰,肖民.锌镍单液流电池正极Ni1-xMnx(OH)2倍率性能分析[J].无机化学学报,2019,35(8):1403-1410. | |
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