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Ion Ion Electrochemical Memory Cell

IP.com Disclosure Number: IPCOM000094245D
Original Publication Date: 1966-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Gaudet, FC: AUTHOR [+3]

Abstract

With electrochemical storage devices which utilize metal plating and stripping as the basis for information storage, a disadvantage exists in that there is chemical dissolution of the electrodeposit by the plating solution. To overcome this disadvantage, an ion-ion electro-chemical cell is adapted for use as a memory device. Changes in the ionic ratio constitute the storage. For example, the pervanadylvanadyl couple is suitable. The cell is comprised of anolyte compartment 13, memory compartment 15 and connecting passage 17. Chemically inert platinum wire 19 and sheet 22 are respectively positioned in the anolyte compartment and the catholyte-memory compartment and externally connected to reversible voltage source 21. The anolyte compartment contains 0. 1 M ferric bromide solution.

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Ion Ion Electrochemical Memory Cell

With electrochemical storage devices which utilize metal plating and stripping as the basis for information storage, a disadvantage exists in that there is chemical dissolution of the electrodeposit by the plating solution. To overcome this disadvantage, an ion-ion electro-chemical cell is adapted for use as a memory device. Changes in the ionic ratio constitute the storage. For example, the pervanadylvanadyl couple is suitable. The cell is comprised of anolyte compartment 13, memory compartment 15 and connecting passage 17. Chemically inert platinum wire 19 and sheet 22 are respectively positioned in the anolyte compartment and the catholyte-memory compartment and externally connected to reversible voltage source 21. The anolyte compartment contains 0. 1 M ferric bromide solution. The memory compartment contains 10/-4/M VO(2)Br, 10/-4/M VO Br and 0.1 M FeBr(3). The ferric ions act as a "carrier" ion to aid in the reduction of the VO(2)+ which is distant from the platinum electrode surface. In this manner, the ratio of VO(2)+ to VO++ is enhanced over that which normally occurs upon applying a voltage to this redox couple. Thus, the voltage change which is to be measured as the indication of storage of data is improved. Voltage change is measured by a saturated calomel electrode 23 and a platinum gauze electrode 27 which are connected to readout potentiometer 28. The connecting passage contains molecular siene 29 which blocks pa...