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Reverse electrodialysis can convert salt difference energy into electrical energy by mixing two water bodies with different salt concentrations. However, in recent years, it has been found that when using actual water bodies instead of sodium chloride solution as the feed solution, the electricity generation efficiency of reverse electrodialysis will significantly decrease. Compared to sodium chloride solution, actual water bodies are more complex in composition and contain various high valent ions. By adding potassium ions, magnesium ions, calcium ions, and sulfate ions as feed solutions to sodium chloride solution through experiments, the contribution of common trace ions in concentrated seawater and seawater to the performance of the stack was studied. Through experiments, it was found that divalent ions can reduce the performance of the stack. The concentration of magnesium and calcium ions in seawater and seawater has the greatest impact on the performance of the stack, significantly increasing the internal resistance of the stack and thereby reducing the power density output of the stack. The greater the salt difference energy between the feed solutions, the smaller the internal resistance, and the higher the open circuit voltage and power density. Increasing the flow rate of the feed solution can improve the output performance of the stack. However, as the flow rate continues to increase, the internal resistance of the stack will become unstable. Increasing the temperature of the feed solution can improve the performance of the stack. Therefore, a suitable temperature should be maintained for the feed solution based on the properties of the ion exchange membrane
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