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Electrochemical Alloying of Lead in Potassium-Ion Batteries
The electrochemical alloying of lead-based electrodes with potassium was investigated by galvanostatic measurements as well as by ex situ and operando X-ray diffraction. The electrochemical reduction must be activated by an initial high current pulse which prevents the passivation of the lead electrode. The alloying process leads to the formation of crystalline KPb. During the discharge, two intermediate phases are observed, K 10 Pb 48 and K 4 Pb 9 , whereas only K 4 Pb 9 seems to form duringdoi:10.1021/acsomega.8b01369.s001 fatcat:kl4ltzg265f6tgfwarvr2ckrvq