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A highly selective LiMn 2 O 4 -Polypyrrole electrochemical cell for the extraction of LiCl from natural brine is described. Reproducible intercalation of Li + in Li x Mn 2 O 4 (0 ≤ x ≤ 1) and Cl − in oxidized polypyrrole (PPy + ) is achieved with an overall cell voltage of less 1 V over more than 200 cycles with 50% charge efficiency and 5–10 Wh.mol −1 energy consumption. No insertion of Na + has been observed.
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Missoni et al. (2016) studied this question.
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