Two reduction processes for hydrogen adsorption and absorption at MmNi5-type alloy electrodes

被引：12

作者：

Deng, BH ^{[1
]}

Li, YF ^{[1
]}

Wang, RQ ^{[1
]}

Fang, SB ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China

来源：

ELECTROCHIMICA ACTA | 1999年 / 44卷 / 17期

关键词：

Ni/MH battery; MmNi(5)-type electrode; reduction process; hydrogen absorption;

D O I：

10.1016/S0013-4686(99)00009-2

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical hydrating/dehydrating behavior of MmNi(5)-type alloy electrodes in an alkaline solution was investigated with cyclic voltammetry, scanning electron microscopy and X-ray photoelectron spectroscopy analysis. At an Mm(Ni3.8Co0.5Al0.4Mn0.3)(5) powder microelectrode, a hydrogen absorption peak was observed at more negative potential than that of the water electroreduction and hydrogen adsorption peak in its cyclic voltammograms. In addition, the electrochemical mechanism of the hydrogen absorption and desorption at the hydride electrodes in the alkaline solution is discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：2853 / 2857

页数：5

共 14 条

[1] ALLOYS FOR HYDROGEN STORAGE IN NICKEL-HYDROGEN AND NICKEL METAL HYDRIDE BATTERIES [J].

ANANI, A ;

VISINTIN, A ;

PETROV, K ;

SRINIVASAN, S ;

REILLY, JJ ;

JOHNSON, JR ;

SCHWARZ, RB ;

DESCH, PB .

JOURNAL OF POWER SOURCES, 1994, 47 (03) :261-275

[2] POWDER MICROELECTRODES [J].

CHA, CS ;

LI, CM ;

YANG, HX ;

LIU, PF .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1994, 368 (1-2) :47-54

[3] THERMODYNAMIC AND ELECTRODE KINETIC FACTORS IN CATHODIC HYDROGEN SORPTION INTO METALS AND ITS RELATIONSHIP TO HYDROGEN ADSORPTION AND POISONING [J].

CONWAY, BE ;

JERKIEWICZ, G .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1993, 357 (1-2) :47-66

[4] TIME-SCALES OF ELECTROCHEMICAL DESORPTION AND SORPTION OF H IN RELATION TO DIMENSIONS AND GEOMETRIES OF HOST METAL HYDRIDE ELECTRODES [J].

CONWAY, BE ;

WOJTOWICZ, J .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1992, 326 (1-2) :277-297

[5] Hydrogen adsorption of metal nickel and hydrogen storage alloy electrodes [J].

Gao, XP ;

Liu, J ;

Ye, SH ;

Song, DY ;

Zhang, YS .

JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 253 :515-519

[6] PROTON NMR-STUDIES OF LANTHANUM NICKEL HYDRIDE - STRUCTURE AND DIFFUSION [J].

HALSTEAD, TK .

JOURNAL OF SOLID STATE CHEMISTRY, 1974, 11 (02) :114-119

[7] MECHANICAL PROCESS FOR ENHANCING METAL HYDRIDE FOR THE ANODE OF A NI-MH SECONDARY BATTERY [J].

IKEYA, T ;

KUMAI, K ;

IWAHORI, T .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1993, 140 (11) :3082-3086

[8] EMBRITTLEMENT OF LANI5-TYPE ALLOY ELECTRODES DURING THE CATHODIC EVOLUTION OF HYDROGEN [J].

KITAMURA, T ;

IWAKURA, C ;

TAMURA, H .

ELECTROCHIMICA ACTA, 1982, 27 (12) :1723-1727

[9] THE HYDROGEN ELECTRODE-REACTION CHARACTERISTICS OF THIN-FILM ELECTRODES OF NI-BASED HYDROGEN STORAGE ALLOYS [J].

MACHIDA, K ;

ENYO, M ;

ADACHI, G ;

SHIOKAWA, J .

ELECTROCHIMICA ACTA, 1984, 29 (06) :807-815

[10] A NICKEL METAL HYDRIDE BATTERY FOR ELECTRIC VEHICLES [J].

OVSHINSKY, SR ;

FETCENKO, MA ;

ROSS, J .

SCIENCE, 1993, 260 (5105) :176-181

← 1 2 →