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pH Differential Power Sources with
Electrochemical Neutralisation
Huanqiao Li, Chi-Ying Vanessa Li, Guo-Ming Weng and
Kwong-YuChan
The cell voltage of aqueous electrochemical power sources is limited to be
within 1.229 V, the thermodynamic stability window of water. This cell volt-
age is signicantly lower than the values of cells operating in organic electro-
lytes. For an aqueous electrode with a half-cell reaction that is pH sensitive,
it is possible to have a higher cell voltage by coupling the positive electrode
in acid with the negative electrode in an alkaline electrolyte. The electrolytes
of different pH in these hybrid power source ...