采用X射线衍射(XRD)分析,充放电测试,线性极化和电位阶跃等方法研究了在750,850,950 ℃ 3个不同温度下进行固相烧结对TiNi储氢合金的相结构和电化学性能的影响.结果表明:随着烧结温度的提高,TiNi合金最大放电容量由179.0 mAh·g-1增加到188.1和211.3 mAh·g-1.虽然温度的升高并没有提高合金的交换电流密度,但却大大增强了氢在合金中的扩散速率,扩散系数D从750℃的2.49×10-10cm2·s-1增加到850℃的2.61×10-10cm2·s-1和950℃的3.48×10-10cm2·s-1,从而显著的改善了合金电极的高倍率放电性能(HRD).950℃烧结后的合金在1500 mA·g-1的放电电流下仍然可以放出84.6 mAh·g-1的电量.
参考文献
| [1] | Weng C S;Lei Y Q;Weng Q D .Effects of Nb and Pd on elec-trochemical properties of a Ti-Ni hydrogen-storage electrode[J].Journal of Power Sources,1998,70(02):222. |
| [2] | 胡子龙.贮氢材料[M].北京:化学工业出版社,2002 |
| [3] | Takeshita H T;Tanaka H;Kiyobyashi T;Takeichi N Kuriyama N .Hydrogenation characteristics of Ti2Ni end Ti4Ni2X (X = O,N,C)[J].Journal of Alloys and Compounds,2002,330-332:517. |
| [4] | Liu J;Gan X P;Song D Y;Zheng Y S Ye S H .The charac-teristics of the microencapsulated Ti-Ni alloys and their electrodes[J].Journal of Alloys and Compounds,1995,231(1-2):852. |
| [5] | 赵建民;李国勋.Ti-Ni合金电极及其放电性质的研究[J].电源技术,1992(02):1. |
| [6] | 王春生,雷永泉,潘洪革.Ti-Ni系贮氢电极[J].稀有金属材料与工程,1994(05):1-8. |
| [7] | Xu Y H;Chen C P;Wang Q D;Chen L X .The effect of tem-perature on the electrode properties of the directly prepared Ti3Ni2 alloy[J].Journal of Hydrogen Energy,2001,26(11):1177. |
| [8] | Xu YH.;Wang QD.;Chen CP. .The influence of small amounts of added elements on the electrode performance characteristics for Ti3Ni2 hydrogen storage alloy[J].Materials Chemistry and Physics,2001(2):190-194. |
| [9] | Electrochemical properties of titanium-based hydrogen storage alloy prepared by solid phase sintering[J].International journal of hydrogen energy,2010(7):2717. |
| [10] | Zheng G.;White RE.;Popov BN. .DETERMINATION OF TRANSPORT AND ELECTROCHEMICAL KINETIC PARAMETERS OF BARE AND COPPER-COATED LANI4.27SN0.24 ELECTRODES IN ALKALINE SOLUTION[J].Journal of the Electrochemical Society,1996(3):834-839. |
| [11] | Pan H G;Ma J X;Wang C S;Chen S A,Wang X H,Chen C P,Wang Q D .Studies on the electrochemical properties of MINi4.3-x CoxAl0 7 hydride alloy electrodes[J].Journal of Alloys and Compounds,1999,293-295:648. |
| [12] | Zheng G.;White RE.;Popov BN. .DETERMINATION OF TRANSPORT AND ELECTROCHEMICAL KINETIC PARAMETERS OF BARE AND COPPER-COATED LANI4.27SN0.24 ELECTRODES IN ALKALINE SOLUTION[J].Journal of the Electrochemical Society,1996(3):834-839. |
| [13] | Zheng G.;White RE.;Popov BN. .ELECTROCHEMICAL DETERMINATION OF THE DIFFUSION COEFFICIENT OF HYDROGEN THROUGH AN LANI4.25AL0.75 ELECTRODE IN ALKALINE AQUEOUS SOLUTION[J].Journal of the Electrochemical Society,1995(8):2695-2698. |
| [14] | 刘红,李荣德.热处理对AB5型快淬态储氢合金组组结构及电化学性能的影响[J].材料科学与工艺,2006(01):91-94. |
| [15] | Nishina T.;Uchida I.;Ura H. .DETERMINATION OF CHEMICAL DIFFUSION COEFFICIENTS IN METAL HYDRIDE PARTICLES WITH A MICROELECTRODE TECHNIQUE[J].Journal of the Electrochemical Society,1997(4):1273-1277. |
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%