DEGRADATION BEHAVIORS OF NEW TYPE TiV-BASED HYDROGEN STORAGE ELECTRODE ALLOYS

金属学报(英文版), 2006, 19(1): 68-74.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

2.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

3.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

4.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

5.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

6.Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

基金项目: 中国科学院资助项目(50271063，50471040)

DEGRADATION BEHAVIORS OF NEW TYPE TiV-BASED HYDROGEN STORAGE ELECTRODE ALLOYS

Keywords： metal hydrides

The degradation behaviors of the TiV-based multiphase hydrogen storage alloy Ti0.8Zr0.2V3.2Mn0.64-Cr0.96Ni1.2 during electrochemical cycling in alkaline electrolyte have been studied by XRD, SEM,EIS and AES measurements. XRD analysis indicates that the alloy consists of a C14-type Laves phase and a V-based solid solution. The lattice parameters of both phases are increased after discharged with cycling, which indicates that more irreversible hydrogen remains not discharged in the alloy. It should be responsible for the decrease of discharge capacity. SEM micrographs show that after 10 electrochemical cycles, a large number of cracks can be observed in the alloy, existing mainly in the V-based solid solution phase. Moreover, after 30 cycles, the alloy particles are obviously pulverized due to the larger expansion and shrinkage of cell volumes during hydrogen absorption and desorption, which induces the fast degradation of the TiV-based hydrogen storage alloys. EIS and AES measurements indicate that some passive oxide film has been formed on the surface of alloy electrode, which has higher charge-transfer resistance, lower hydrogen diffusivity, and less electro-catalytic activity. Therefore it can be concluded that the pulverization and oxidation of the alloy are the main factors responsible for the fast degradation of the TiV-based hydrogen storage alloys.

参考文献

[1]	S R Ovshinsky;M A Fetcenko;J Ross .[J].Science,1993,260:176.
[2]	L Schlapbach;A Züttel .[J].Nature,2001,414:353.
[3]	H G Pan;Y F Zhu;M X Gao;Q.D.Wang .[J].Journal of the Electrochemical Society,2002,149(07):A829.
[4]	H G Pan;Y F Zhu;M X Gao;Y.F.Liu, R.Li, Y.Q.Lei Q.D.Wang .[J].Journal of Alloys and Compounds,2004,370:254.
[5]	J J G Willems .[J].Philips Journal of Research,1984,39(zk):1.
[6]	T Sakai;K Oguro;H Miyamura;N.Kuriyama, A.Kato H.Ishikawa .[J].Journal of the Less-Common Metals,1990,161:193.
[7]	J. -S. Yu;S. -M. Lee;K. Cbo;J. -Y. Lee .The cycle life of Ti{sub}0.8Zr{sub}0.2V{sub}0.5Mn{sub}(0.5-x)Cr{sub}xNi{sub}0.8(x = 0 to 0.5) alloys for metal hydride electrodes of Ni-metal hydride rechargeable battery[J].Journal of the Electrochemical Society,2000(6):2013-2017.
[8]	M Tsukahara;K Takahashi;T Mishima;A.Isomura T.Sakai .[J].Journal of Alloys and Compounds,1996,243:133.
[9]	L.Z. Ouyang;C. Y. Chung;M. Q. Zeng .Mg-Ni THIN FILM--A POTENTIAL NEGATIVE ELECTRODE FOR NIKEL-METAL HYDRIDE BATTERY[J].Acta metallurgica Sinica,2003(3):226-230.
[10]	Y F Liu;H G Pan;M X Gao;Y.F.Zhu, H.W.Ge, S.Q.Li Y.Q.Lei .[J].ACTA METALLURGICA SINICA,2003,39(06):666.
[11]	N Kuriyama;T Sakai;H Miyamura;I.Uehara, H.Ishikawa T.Iwasaki .[J].Journal of Alloys and Compounds,1993,202:183.
[12]	P Puetchi;R Govanali .[J].Journal of the Electrochemical Society,1988,135:2663.
[13]	H H Lee;K Y Lee;J Y Lee .[J].Journal of Alloys and Compounds,1997,260:201.
[14]	Y F Liu;H G Pan;M X Gao;R.Li Y.Q.Lei .[J].Journal of Alloys and Compounds,2005,389:281.

上一张下一张

计量

下载量()
访问量()

作者相关

在本站搜索
在百度学术搜索
在万方数据库搜索
在CNKI搜索

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网

DEGRADATION BEHAVIORS OF NEW TYPE TiV-BASED HYDROGEN STORAGE ELECTRODE ALLOYS

参考文献