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：姚寿广 窦飞 邢如月 程杰 肖民 YAO Shou-Guang;DOU Fei;XING Ru-Yue;CHENG Jie;XIAO Min(School of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu 212003,China;Zhangjiagang Smartgrid Fanghua Electrical Energy Storage Research Institute Co.,Ltd.,Suzhou,Jiangsu 215600,China;Zhejiang Yuyuan Energy Storage Technology Co.,Ltd.,Huzhou,Zhejiang 313100,China)

机构地区：[1]江苏科技大学能源与动力学院,镇江212003 [2]张家港智电芳华蓄电研究所有限公司,苏州215600 [3]浙江裕源储能科技有限公司,湖州313100

出　　处：《无机化学学报》2019年第8期1403-1410,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.51776092)资助项目

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。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.

关 键 词：缓冲溶液法 Ni1-xMnx(OH)2 倍率性能 循环稳定性 

分 类 号：O646[理学—物理化学]