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Electrochemical Alloying of Lead in Potassium-Ion Batteries.

ABSTRACT: 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, K₁₀Pb₄₈ and K₄Pb₉, whereas only K₄Pb₉ seems to form during the charge. High capacity retention is observed, with, however, a limited specific capacity value because of high weight of lead.

SUBMITTER: Gabaudan V

PROVIDER: S-EPMC6645338 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Electrochemical Alloying of Lead in Potassium-Ion Batteries.

Gabaudan Vincent V Berthelot Romain R Stievano Lorenzo L Monconduit Laure L

ACS omega 20180928 9

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, K10Pb48 and K4Pb9, whereas ...[more]

PMID: 31459294

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