Electrical properties of a non-stoichiometric copper sulfide solid electrolyte interface

被引:11
作者
Pauporte, T [1 ]
Vedel, J [1 ]
机构
[1] Ecole Natl Super Chim Paris, Lab Electrochim & Chim Analyt, CNRS URA 216, F-75231 Paris 05, France
关键词
copper sulfide; solid cuprous halide conductor; AC impedance; copper diffusion;
D O I
10.1016/S0167-2738(98)00077-0
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A solid electrochemical cell copper-metal/electrolyte/mineral was studied by impedance spectroscopy between 10(5) and 2 x 10(-3) Hz in the temperature range 120-165 degrees C. The mineral was a mixture of hexagonal chalcocite and high digenite of natural origin with a composition Cu1.88S. The electrolyte was RbCu4Cl5. The impedance spectra at equilibrium and low cathodic over-voltages showed two distinct regions. At high frequencies, the general shape of the diagram was a depleted are of a circle. At low frequencies, a diffusion branch was observed but not when the working electrode was replaced by copper metal. The results were interpreted in terms of copper insertion into the sulfide. The real contact area was determined and the impedance parameters were calculated and analyzed. At 145 degrees C the chemical diffusion coefficient of copper vacancies calculated from impedance data is 2.0 x 10(-7) cm(2) s(-1). (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:125 / 134
页数:10
相关论文
共 25 条
[1]   COPPER ELECTROMIGRATION IN POLYCRYSTALLINE COPPER SULFIDE [J].
ALLEN, LH ;
BUHKS, E .
JOURNAL OF APPLIED PHYSICS, 1984, 56 (02) :327-335
[2]  
AMSTRONG RD, 1973, J ELECTROANAL CHEM, V44, P157
[3]   ROOM-TEMPERATURE, ELECTRIC-FIELD INDUCED CREATION OF STABLE DEVICES IN CULNSE2 CRYSTALS [J].
CAHEN, D ;
GILET, JM ;
SCHMITZ, C ;
CHERNYAK, L ;
GARTSMAN, K ;
JAKUBOWICZ, A .
SCIENCE, 1992, 258 (5080) :271-274
[4]  
CHERNYAK L, 1907, APPL PHYS LETT, V6542, P94
[5]  
DESPORTE C, 1994, ELECT SOLIDES
[6]   STUDY OF CU-S PHASE-DIAGRAM IN COMPOSITIONAL AREA CU2,000S-CU1,960S [J].
DUMON, A ;
LICHANOT, A ;
GROMB, S .
JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE, 1974, 71 (03) :407-414
[7]   ELECTRICAL CONDUCTIVITY OF SILVER SULFIDE [J].
HEBB, MH .
JOURNAL OF CHEMICAL PHYSICS, 1952, 20 (01) :185-190
[8]   ELECTRONIC AND IONIC-CONDUCTION IN CU2-DELTASE, CU2-DELTAS AND CU2-DELTA(SE,S) [J].
ISHIKAWA, T ;
MIYATANI, S .
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1977, 42 (01) :159-167
[9]   NUCLEAR MAGNETIC-RESONANCE AND ELECTRICAL-CONDUCTION OF COPPER CHALCOGENIDES [J].
KANASHIRO, T ;
OHNO, T ;
SATOH, M ;
OKAMOTO, K ;
KOJIMA, A ;
AKAO, F .
SOLID STATE IONICS, 1981, 3-4 (AUG) :327-330
[10]   PHASE-DIAGRAM AND HIGH COPPER-ION CONDUCTIVITY OF THE COPPER(I) CHLORIDE RUBIDIUM CHLORIDE SYSTEM [J].
KANNO, R ;
TAKEDA, Y ;
MASUYAMA, Y ;
YAMAMOTO, O ;
TAKAHASHI, T .
SOLID STATE IONICS, 1983, 11 (03) :221-226