Atomic layer deposition to enhance lithium-ion battery electrode interfacial properties and behavior
Filipp Obrezkov
Aalto University
The modification of the lithium-ion battery electrode interfaces by atomic layer deposition of a barrier layer is among the most promising ways to enhance the LIB performance. It is especially important for rapidly developing solid-state batteries, for which the reaching of reliable electrode-electrolyte contact is an especially important challenge. We studied various approaches for modifying the positive electrodes (Ni-rich layered oxides) by coating with a protective layer on a ready-made electrode (routes 4-6) and on the powder of the active electrode material (routes 3-5). In addition, the possibility of hydroxide precursor modification by gas-phase processes followed by its lithiation (routes 1-2) has also been studied. The diagram of the mentioned processes is shown in the attached figure. To study the possibilities of modifying a metallic lithium negative electrode, a straightforward ALD process of a coating with a barrier layer onto the ready-made electrode was applied.
