As a promising electrochemical energy storage system, rechargeable aluminum batteries face critical challenges in their quest for commercial viability. While the design of suitable cathodes has attracted much attention, their chemical composition and purity has been less of a concern. This is especially true for carbon cathodes, where the presence of metallic impurities is often overlooked. Herein, we demonstrate the influence that transition metals exert on the electrochemistry of carbon nanotube cathodes for non‐aqueous aluminum batteries. In the presence of chloroaluminate electrolytes, these synthesis by‐products originate inflated capacities, increased self‐discharge and misleading electrochemical signatures, among others. Thus, our findings affirm the need for strict control of the composition and purity of materials (and components) used in non‐aqueous aluminum batteries.

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碳阴极中的金属杂质如何影响铝电池的电化学

作为有前途的电化学储能系统，可充电铝电池在寻求商业可行性方面面临着严峻的挑战。尽管合适的阴极设计吸引了很多注意力，但它们的化学组成和纯度却很少受到关注。对于通常忽略金属杂质存在的碳阴极而言，尤其如此。在本文中，我们证明了过渡金属对非水铝电池用碳纳米管阴极电化学的影响。在存在氯铝酸盐电解质的情况下，这些合成副产物会导致容量增加，自放电增加以及电化学信号产生误导等。从而，