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
作者单位E-mail
姚寿广 江苏科技大学能源与动力学院, 镇江 212003 zjyaosg@126.com 
窦飞 江苏科技大学能源与动力学院, 镇江 212003
张家港智电芳华蓄电研究所有限公司, 苏州 215600 
 
邢如月 江苏科技大学能源与动力学院, 镇江 212003
张家港智电芳华蓄电研究所有限公司, 苏州 215600 
 
程杰 张家港智电芳华蓄电研究所有限公司, 苏州 215600
浙江裕源储能科技有限公司, 湖州 313100 
 
肖民 江苏科技大学能源与动力学院, 镇江 212003  
摘要: 采用缓冲溶液法制备Mn掺杂Ni1-xMnx(OH)2x=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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