采用化学反应共沉淀法制各出PO43-和Al+-3+阴阳离子复合掺杂的α-Ni(OH)2粉体,采用X射线衍射仪(XRD),电子能谱(EDS).红外光谱(IR)和热重分析技术(TG-DSC)表征了其结构和组成.结果表明:添加PO43-和Al3+离子的α-Ni(OH)2增加了层间距,充放电循环测试表明复合掺杂的α-Ni(OH)2在15次循环结束后没有发生相变,循环伏安曲线呈现较好的重现性,表明了复合掺杂的α-Ni(OH)2在碱性电解液中具有较高的结构稳定性,放电容量达348.51 mA/g.
In this paper, α-Ni(OH)2 powder codoped with Al3+ and PO43- was prepared by chemical coprecipitation method.The structure and composition of the doped α-Ni(OH)2 were analyzed by X-ray diffraction (XRD), electron energy spectrum (EDS), IR spectroscopy, and thermal gravity-differential scanning calorimetry (TG-DSC) techniques. The results demonstrate that the addition of Al3+ and PO43- increases the layer distance of α-Ni(OH)2. Moreover, the Al3+ and PO43- doping results in more water molecules contained in α-Ni(OH)2. Charge-discharge cycling measurements show that there is no phase transformation for the Al3+ and PO43- codoped α-Ni(OH)2 after 15 cycles and the charge-discharge curves exhibit good reproducibility after 30 cycles, indicating the high structural stability of the codoped α-Ni(OH)2 in alkaline electrolyte. The capacity of this codoped α-Ni(OH)2 is up to 348.51 mAh·g-1.
参考文献
| [1] | Roto Roto;Gilles Villemure .[J].Electroanalytical Chemistry,2007,601:112. |
| [2] | Timothy Biswiek;William Jone;Aleksandta Pacula;Ewa Serwicka .[J].Synthesis Solid State Chemistry,2006,2179:49. |
| [3] | Liu B;Yuan Huatang;Zhang Yunshi et al.[J].Journal of Power Sources,1999,79:277. |
| [4] | Zhang HB.;Liu HS.;Cao XJ.;Li SJ.;Sun CC. .Preparation and properties of the aluminum-substituted alpha-Ni(OH)(2)[J].Materials Chemistry and Physics,2003(1):37-42. |
| [5] | Jayalakshmi M;Venugopal N;Ramachandra et al.[J].Journal of Power Sources,2005,150:272. |
| [6] | Ramesh T N;Vishnu Kamath P .[J].Journal of Power Sources,2006,156:655. |
| [7] | Xiaohong Liu;Lan Yu .Synthesis of nanosized nickel hydroxide by solid-state reaction at room temperature[J].Materials Letters,2004(7/8):1327-1330. |
| [8] | Jayashree R S;Kamath P V .[J].J Applied Chemistry,2006,31:1315. |
| [9] | LIU Yuan-gang,TANG Zhi-yuan,XU Qiang,ZHANG Xiao-yang,LIU Yong.Ni(OH)2 particles synthesized by high energy ball milling[J].中国有色金属学会会刊（英文版）,2006(05):1218-1222. |
| [10] | Zhang Henbin;Liu Hansan;Cao Xuejing et al.[J].Materials Chemistry and Physics,2003,79:37. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%