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    • 8. 发明授权
    • Alternating-polarity operation for complete regeneration of electrochemical deionization system
    • 用于电化学去离子系统完全再生的交替极性操作
    • US07138042B2
    • 2006-11-21
    • US10801246
    • 2004-03-15
    • Tri D. TranDavid J. Lenz
    • Tri D. TranDavid J. Lenz
    • C02F1/469
    • B82Y30/00C02F1/4691C02F2201/4611
    • An electrically regeneratable battery of electrochemical cells for capacitive deionization (including electrochemical purification) and regeneration of electrodes is operated at alternate polarities during consecutive cycles. In other words, after each regeneration step operated at a given polarity in a deionization-regeneration cycle, the polarity of the deionization step in the next cycle is maintained. In one embodiment, two end electrodes are arranged one at each end of the battery, adjacent to end plates. An insulator layer is interposed between each end plate and the adjacent end electrode. Each end electrode includes a single sheet of conductive material having a high specific surface area and sorption capacity, preferably a sheet formed of carbon aerogel composite. The batter further includes a plurality of generally identical double-sided intermediate electrodes that are equidistally separated from each other, between the two end electrodes. As the electrolyte enters the battery of ells, t flows through a continuous open serpentine channel defined by the electrodes, substantially parallel to the surfaces of the electrodes. By polarizing the cells, ions are removed from the electrolyte and are held in the electric double layers formed at the carbon aerogel surfaces of the electrodes. As the electrodes of each cell of the battery are saturated with the removed ions, the battery is regenerated electrically at a reversed polarity from that during the deionization step of the cycle, thus significantly minimizing secondary wastes.
    • 用于电容去离子(包括电化学纯化)和电极再生的电可再生电池用于连续循环期间的交替极性。 换句话说,在去离子 - 再生循环中以给定极性操作的每个再生步骤之后,维持下一循环中去离子步骤的极性。 在一个实施例中,两个端电极被布置在电池的每个端部处,邻近端板。 在每个端板和相邻的端电极之间插入绝缘体层。 每个端电极包括具有高比表面积和吸附能力的单片导电材料,优选由碳气凝胶复合材料形成的片材。 面糊还包括在两个端电极之间彼此等距离分离的多个大致相同的双面中间电极。 当电解质进入电池时,t流过由电极限定的连续开放的蛇形通道,基本上平行于电极的表面。 通过使电池极化,离子从电解质中除去并保持在形成在电极的碳气凝胶表面的电双层中。 当电池的每个电池的电极被去除的离子饱和时,电池以与循环的去离子步骤相反的极性电性地再生,从而显着地最小化次级废物。