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Electrochemical Bistable Devices

IP.com Disclosure Number: IPCOM000093767D
Original Publication Date: 1966-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Dahms, H: AUTHOR

Abstract

This electrochemical device exhibits two bistable voltages as a result of its voltage-current characteristic. The device consists basically of two electrodes immersed in an electrolyte. Voltage-current curves having a characteristic S-shape, as shown above, are observed in numerous electrochemical reactions e.g. in the reduction of › Fe(CN)6|/3-/, PtCl(6)/2-/, PtCl(4)/2-/, Pt(NO(2))(4)/2-/, RhCl(6)/3-/, CdI(4)/2-/ and others.

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Electrochemical Bistable Devices

This electrochemical device exhibits two bistable voltages as a result of its voltage-current characteristic. The device consists basically of two electrodes immersed in an electrolyte. Voltage-current curves having a characteristic S- shape, as shown above, are observed in numerous electrochemical reactions e.g. in the reduction of > Fe(CN)6|/3-/, PtCl(6)/2-/, PtCl(4)/2-/, Pt(NO(2))(4)/2-/, RhCl(6)/3-/, CdI(4)/2-/ and others.

When two electrodes are immersed in a suitable electrolyte containing one or more of the ionic species mentioned, and a constant current ic (i(min) > i(i) < i(max)) is switched on, a voltage E(1) appears across the electrodes. By applying a current pulse with i > i(max), the device operates at a higher cell voltage E(2). A current pulse in the opposite direction resets the cell voltage to E(1).

This type of memory device has several features. Information can be read out directly and nondestructively as a voltage. The two voltage levels differ by as much as 0.5 v. The voltages are stable over long periods of time. The device has simplicity of construction.

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