Dalian Institute of Chemical Physics, Chinese Academy Sciences
Potassium-ion batteries (PIBs) have been considered one of the most promising alternatives to lithium-ion batteries (LIBs) because of their competitive energy density with significantly low production costs. Moreover, alloy-type materials are expected to be the high-performance anode of PIBs owing to their intrinsic chemical stability and high theoretical specific capacity. Unfortunately, severe incompatibility between the active alloy-type materials and electrolytes, especially for the formation of unstable solid-electrolyte interfacial (SEI) films, often leads to insufficient cycle life.
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