采用水热法制备了钴掺杂的纳米花瓣状Ni(OH)2,讨论了钴掺杂量对产物形貌、结构和电化学性能的影响.结果表明,不同钴摩尔分数掺杂的样品都呈现α/β混合相花瓣微球,其比表面积均在280m2/g以上,远高于普通球形氢氧化镍(5～10m2/g).电化学性能测试表明,钴添加剂显著提高了氢氧化镍高倍率放电容量和循环稳定性能,1.0C倍率时钴摩尔分数10%的样品放电容量可达430.1mAh/g(以纯氢氧化镍计),接近α-Ni(OH)2的理论容量(480mAh/g),3.0C倍率时其放电容量(367.1mAh/g)仅比0.2C时的放电容量(406.9mAh/g)衰减9.8%.
参考文献
| [1] | Ovshinsky S R;Fetcenko M A;Fierro C .Enhanced nickel hydroxide positive electrode materials for alkaline rechargeable electrochemical cells[P].US,5523182,1996-06-04. |
| [2] | 刘长久,王慧景.非晶纳米氢氧化镍电极材料的制备及其控制条件[J].稀有金属材料与工程,2007(04):676-679. |
| [3] | 倪星元;姚兰芳;沈军.纳米材料制备技术[M].北京:化学工业出版社,2008:21. |
| [4] | Tao FF;Guan MY;Zhou YM;Zhang L;Xu Z;Chen J .Fabrication of nickel hydroxide microtubes with micro- and nano-scale composite structure and improving electrochemical performance[J].Crystal growth & design,2008(7):2157-2162. |
| [5] | Corinne Coudun;Etienne Amblard;Julie Guihaume .Nanostructured particles by controlled precipitation techniques Example of nickel and cobalt hydroxides[J].Catalysis Today,2007(1/2):49-54. |
| [6] | Latha Kumari;Li W Z .Self-assembly of β-Ni(OH)2 nanoflakelets to form hollow submicrospheres by hydrotherrnal route[J].Physica E:Low-dimensional Systems and Nanostructures,2009,41(07):1289. |
| [7] | 刘小虹,余兰.纳米Ni（OH）2的制备及其放电性能[J].电池工业,2004(03):145-148. |
| [8] | Liu HJ;Peng TY;Zhao DE;Dai K;Peng ZH .Fabrication of nickel oxide nanotubules by anionic surfactant-mediated templating method[J].Materials Chemistry and Physics,2004(1):81-86. |
| [9] | Yang LX;Zhu YJ;Tong H;Liang ZH;Li L;Zhang L .Hydrothermal synthesis of nickel hydroxide nanostructures in mixed solvents of water and alcohol[J].International Journal of Quantum Chemistry,2007(7):2095-2101. |
| [10] | 吴正翠,朱熹,潘铖,姚震宇,谢毅.花状β-氢氧化镍的合成和表征[J].无机化学学报,2006(08):1371-1374. |
| [11] | Tompsett GA;Conner WC;Yngvesson KS .Microwave synthesis of nanoporous materials[J].Chemphyschem: A European journal of chemical physics and physical chemistry,2006(2):296-319. |
| [12] | Elumalai P;Vasan H N;Munichadraiah N .Electrochemical studies of cobalt hydroxide an additive for nickel electrodes[J].Journal of Power Sources,2001,93(1-2):201. |
| [13] | 陈惠 .稳态α型氢氧化镍的制备、结构和电化学性能[D].浙江大学,2004. |
| [14] | 庄玉贵.纳米级氢氧化镍电极材料的研究进展[J].电源技术,2007(05):425-428. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%