Mn掺杂Ni（OH）2的合成及电化学性能研究  

Preparation and Electrochemical Performance of Mn Doped Ni（OH）2

作　　者：肖民 邢如月 姚寿广 程杰 申亚举 杨裕生 XIAO Min;XING Ru-Yue;YAO Shou-Guang;CHENG Jie;SHEN Ya-Ju;YANG Yu-Sheng(School of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;Zhangjiagang Smartgrid Fanghua Electrical Energy Storage Research Institute,Zhangjiagang 215600,China;Zhejiang Yuyuan Energy Storage Technology Co. Ltd.,Changxing 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,张家港215600 [3]浙江裕源储能科技有限公司,长兴313100

出　　处：《无机材料学报》2019年第7期703-708,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(51776092)~~

摘　　要：本工作采用缓冲溶液法制备Mn掺杂Ni(OH)2(Ni1-xMnx(OH)2,x=0.1,0.2,0.3,0.4),X射线衍射测试表明样品主要是β相,有少量Mn3O4杂相;循环伏安测试表明,x=0.2的材料还原峰积分面积最大、还原分支的峰电流最高;恒流充放电测试表明,在100 mA/g电流密度下,Ni0.8Mn0.2(OH)2放电比容量最高,其第20次循环放电比容量为271.8 mAh/g,同等条件测试的商用β-Ni(OH)2放电比容量为253.6 mAh/g;在300、500 mA/g电流密度下,Ni0.8Mn0.2(OH)2放电比容量仍保持最高,分别为294.7、291.5 mAh/g,而且Mn掺杂Ni(OH)2的循环稳定性也优于商用β-Ni(OH)2。Mn掺杂可改善镍电极的循环稳定性、降低镍电极成本,具有广阔的应用前景。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.

关 键 词：缓冲溶液法 Mn掺杂Ni(OH)2)(Ni1-xMnx(OH)2) 循环稳定性 

分 类 号：TQ174[化学工程—陶瓷工业]