How can i make stable voltage higher than salt waters max stable voltage 1.23V ??

[String Theory]

Hi from String Theory :

I have got stability problem with my salt water cell because of
higher voltage than the salt electrolytes max stable voltage = 1.23 Volt !!

What can i do to get stable voltage higher than 1.23 Volt ??

Sincerly - Kai Anders Wold

[String Theory]

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[dragon]

Salt water galvanic cell using steel wool and magnesium US3401063.