在对锌多晶进行变形、退火等方式处理的基础上，运用金相分析法、X 射线衍射法、循环伏安法等方法，分析了金属锌的组织结构与电化学性能的关系。结果表明，锌单晶(002)晶面电极的氧化还原可逆性优于锌单晶(100)晶面电极，锌单晶(100)晶面电极的氧化和还原能力优于锌单晶(002)晶面电极；锌多晶电极的氧化性能和还原性能优于锌单晶电极；晶界、位错等缺陷会提高锌的溶解速度，同时电极表面的位错对还原过程中锌原子的沉积有利；晶粒的增大会减小晶界面积，使得锌电极的晶间腐蚀等局部腐蚀加剧，降低锌电极的耐蚀性，但是晶粒大小对电极电化学性能的影响相对于位错及其它缺陷要小得多。
In this paper,the relationship was studied between the organizational structure and its electrochemical performance for the zinc electrode by metallurgical phase,XRD and cyclic voltammetry.The results show that the reversibility performance of Zn (002)single crystal was superior to Zn (100)and the oxidizing and deoxidi-zing abilities of the Zn (100)single crystal was superior to Zn (002).The oxidizing and deoxidizing abilities of Zn polycrystal was superior to Zn single crystal.In terms of Zn polycrystal,the dissolution was accelerated and the dislocation was of advantage for electrodeposition during the deoxidization due to a great deal of defect such as grain boundary and dislocation.The area of the grain boundary decreased due to grain growth.As a result, the local corrosion,such as the intercrystalline corrosion,was aggravated and the corrosion resistance of the Zn electrode was reduced.However,the effect of the grains size on the electrochemical performance of the Zn elec-trode was much less than the dislocation and other defects.
参考文献
| [1] | Huabin Yang;Xianling Meng;Endong Yang .Effect of La Addition on the Electrochemical Properties of Secondary Zinc Electrodes[J].Journal of the Electrochemical Society,2004(3):A389-A393. |
| [2] | ZHANG Hui,ZHU Liqun,LI Weiping,LIU Huicong.Effect of Y(OH)_3 microparticles on the electrochemical performance of alkaline zinc electrodes[J].稀土学报（英文版）,2009(06):980-985. |
| [3] | Pechcanul M A;Rramanauskas R;Maldonado L .Elec-trochemical investigation of passive layers formed on elec-trodeposited Zn and Zn-alloy coatings in alkaline solutions[J].Electrochem Acta,1997,42(02):255. |
| [4] | Adler T C;Mclarnon F R;Cairns E J .Low-zinc-solubili-ty electrolytes for use in zinc/nickel oxide cells[J].J Electrochem Soc,1993,140(02):289. |
| [5] | Lee C W;Sathiyanarayanan K;Eom S W et al.Novel electrochemical behavior of zinc anodes in zinc/air batter-ies in the presence of additives[J].J Power Sources,2006,159(02):1474-1477. |
| [6] | C. J. Lan;C. Y. Lee;T. S. Chin .Tetra-alkyl ammonium hydroxides as inhibitors of Zn dendrite in Zn-based secondary batteries[J].Electrochimica Acta,2007(17):5407-5416. |
| [7] | E. Frackowiak;J. M. Skowronski .Passivation of zinc in alkaline solution effected by chromates and CrO_3-graphite system[J].Journal of Power Sources,1998(2):175-181. |
| [8] | M. Ma;J.P. Tu;Y.F. Yuan;X.L. Wang;K.F. Li;F. Mao;Z.Y. Zeng .Electrochemical performance of ZnO nanoplates as anode materials for Ni/Zn secondary batteries[J].Journal of Power Sources,2008(1):395-400. |
| [9] | Ullah S;Badshah A;Ahmed F et al.Electrodeposited zinc electrodes for high current Zn/AgO bipolar batteries[J].Int J Electrochem Sci,2011,6:3801-3811. |
| [10] | Luo Z G;Sang S B;Wu Q M et al.A conductive addi-tive for Zn electrodes in secondary Ni/Zn batteries:the magneli phase titanium sub-oxides conductive ceramic TinO2n-1[J].ECS Electrochemistry Letters,2013,2(02):A21-A24. |
| [11] | 张辉,朱立群,韩永祥.电沉积工艺对镀锌层的表面形态及电化学性能的影响[J].中国有色金属学报,2008(01):90-95. |
| [12] | Chang X G;Zhong H F;Cheng D M.Corrosion and electrochemistry of zinc[M].Beij ing:Metallurgical In-dustry Press,2008:27. |
| [13] | Yasumasa Ito;Michael Nyce;Robert Plivelich;Martin Klein;Sanjoy Banerjee .Gas evolution in a flow-assisted zinc-nickel oxide battery[J].Journal of Power Sources,2011(15):6583-6587. |
| [14] | S. Martirosyan .Zinc electrode with reduced dendritic propagation[J].Journal of Power Sources,2007(2):984-987. |
| [15] | JiLing Zhu;YunHong Zhou .Effects of ionomer films on secondary alkaline zinc electrodes[J].Journal of Power Sources,1998(2):266-270. |
| [16] | Zha Q X.An introduction of the kinetics of electrode process[M].Beijing:Science Press,2002:151. |
| [17] | Kaesche H H;Wu Y S.Metal corrosion rationale chemi-cal principles and practical problems[M].Beij ing:Chemi-cal Industry Press,1984:393. |
| [18] | ТомашовНД.Theory of metal corrosion[M].Beijing:Science Press,1964:89. |
| [19] | Mao W M;Zhao X B.Recrystallization and grain growth of metal[M].Beijing:Metallurgical Industry Press,1994:319. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%