Copper diffusion in copper sulfide: A systematic study

S. Cassaignon; Th Pauporté; J. F. Guillemoles; J. Vedel

doi:10.1007/BF02375879

Copper diffusion in copper sulfide: A systematic study

S. Cassaignon
, Th Pauporté
, J. F. Guillemoles
, J. Vedel

Laboratoire Charles Friedel (LCF)
Sorbonne Université

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

Copper sulfide Cu_2-xS is a model mineral for chalcogenides because of the existence of a non-stoichiometric compounds series in the range Cu₂S - CuS in which properties change with x. For this reason, we have studied the influence of the mineral composition on the diffusion in this solid. Electrochemical Impedance Spectroscopy (EIS) applied to CU _2-xS/cupric sulfate electrolyte was the main investigation technique. It enabled us to work at the equilibrium potential at which the composition is fixed and known. Changing the composition by electrochemically removing (or adding) a known amount of Cu, we were able to determine the chemical diffusion coefficient of copper in the composition range (from x = 0 to 0.066). In this work, we present the results obtained in the chalcocite and djurleite phases. These results were compared to other values reported in the literature. From this systematic study we discuss various diffusion mechanisms. Our observations support that in chalcocite and djurleite Cu diffuses via a vacancy mechanism.

Original language	English
Pages (from-to)	364-371
Number of pages	8
Journal	Ionics
Volume	4
Issue number	5-6
DOIs	https://doi.org/10.1007/BF02375879
Publication status	Published - 1 Jan 1998
Externally published	Yes

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title = "Copper diffusion in copper sulfide: A systematic study",

abstract = "Copper sulfide Cu2-xS is a model mineral for chalcogenides because of the existence of a non-stoichiometric compounds series in the range Cu2S - CuS in which properties change with x. For this reason, we have studied the influence of the mineral composition on the diffusion in this solid. Electrochemical Impedance Spectroscopy (EIS) applied to CU 2-xS/cupric sulfate electrolyte was the main investigation technique. It enabled us to work at the equilibrium potential at which the composition is fixed and known. Changing the composition by electrochemically removing (or adding) a known amount of Cu, we were able to determine the chemical diffusion coefficient of copper in the composition range (from x = 0 to 0.066). In this work, we present the results obtained in the chalcocite and djurleite phases. These results were compared to other values reported in the literature. From this systematic study we discuss various diffusion mechanisms. Our observations support that in chalcocite and djurleite Cu diffuses via a vacancy mechanism.",

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year = "1998",

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TY - JOUR

T1 - Copper diffusion in copper sulfide

T2 - A systematic study

AU - Cassaignon, S.

AU - Pauporté, Th

AU - Guillemoles, J. F.

AU - Vedel, J.

PY - 1998/1/1

Y1 - 1998/1/1

N2 - Copper sulfide Cu2-xS is a model mineral for chalcogenides because of the existence of a non-stoichiometric compounds series in the range Cu2S - CuS in which properties change with x. For this reason, we have studied the influence of the mineral composition on the diffusion in this solid. Electrochemical Impedance Spectroscopy (EIS) applied to CU 2-xS/cupric sulfate electrolyte was the main investigation technique. It enabled us to work at the equilibrium potential at which the composition is fixed and known. Changing the composition by electrochemically removing (or adding) a known amount of Cu, we were able to determine the chemical diffusion coefficient of copper in the composition range (from x = 0 to 0.066). In this work, we present the results obtained in the chalcocite and djurleite phases. These results were compared to other values reported in the literature. From this systematic study we discuss various diffusion mechanisms. Our observations support that in chalcocite and djurleite Cu diffuses via a vacancy mechanism.

AB - Copper sulfide Cu2-xS is a model mineral for chalcogenides because of the existence of a non-stoichiometric compounds series in the range Cu2S - CuS in which properties change with x. For this reason, we have studied the influence of the mineral composition on the diffusion in this solid. Electrochemical Impedance Spectroscopy (EIS) applied to CU 2-xS/cupric sulfate electrolyte was the main investigation technique. It enabled us to work at the equilibrium potential at which the composition is fixed and known. Changing the composition by electrochemically removing (or adding) a known amount of Cu, we were able to determine the chemical diffusion coefficient of copper in the composition range (from x = 0 to 0.066). In this work, we present the results obtained in the chalcocite and djurleite phases. These results were compared to other values reported in the literature. From this systematic study we discuss various diffusion mechanisms. Our observations support that in chalcocite and djurleite Cu diffuses via a vacancy mechanism.

U2 - 10.1007/BF02375879

DO - 10.1007/BF02375879

M3 - Article

AN - SCOPUS:0011161593

SN - 0947-7047

VL - 4

SP - 364

EP - 371

JO - Ionics

JF - Ionics

IS - 5-6

ER -

Copper diffusion in copper sulfide: A systematic study

Abstract

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