New membrane improves energy harvesting by reverse electrodialysis

(Phys.org)—Researchers have constructed a new type of nanoporous membrane that does an exceptionally good job at selectively controlling ion transport—for instance, allowing negatively charged ions to pass through the pores, while prohibiting the passage of positively charged ions. To demonstrate one possible application, the researchers developed the membrane into an energy conversion device that harvests energy using its ability to separate charged particles. The technique is very similar to reverse electrodialysis, but the membrane's structure eliminates one of the limitations of traditional reverse electrodialysis, resulting in increased power generation.

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