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Evaluation of carbon cryogels used as cathodes for non-flowing zinc-bromine storage cells

机译:对用作非流动性溴锌存储电池阴极的碳冰晶的评估

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Monolithic megaloporous carbon cryogels were examined for their potential applications as cathodic electrodes in secondary zinc-bromine cells. This work investigates the possibility of using their particular macroporous texture as microscopic bromine tanks in a zinc/bromine battery. The electrochemical behaviour of a cell based upon such a Br_2 electrode was studied and discussed in terms of energy yields, energy storage capability and cycle life. Good storages (over 20 Wh kg~(-1)) could be obtained during the first 2 h of cell charging for currents between 10 and 20 mA g~(-1). The energy yield remains almost constant during a fairly large number of cycles, basically for weak charges (e.g. 25 C g~(-1)). Our findings show that the good cyclability of the cathodic electrode is a consequence of the liquid state of the active bromine phase.
机译:检查了单片巨型多孔碳冰晶作为二次锌溴电池中阴极电极的潜在应用。这项工作研究了使用其特殊的大孔结构作为锌/溴电池中的微小溴罐的可能性。研究和讨论了基于此类Br_2电极的电池的电化学行为,涉及了能量产量,能量存储能力和循环寿命。在10到20 mA g〜(-1)之间的电流下,电池充电的前2小时内可以获得良好的存储(超过20 Wh kg〜(-1))。在相当多的周期内,能量产生几乎保持恒定,主要是对于弱电荷(例如25 C g〜(-1))。我们的发现表明,阴极电极的良好循环能力是活性溴相的液态的结果。

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