Direct-Write Lithiation of Silicon Using a Focused Ion Beam of Li.

ABSTRACT: Electrochemical processes that govern the performance of lithium ion batteries involve numerous parallel reactions and interfacial phenomena that complicate the microscopic understanding of these systems. To study the behavior of ion transport and reaction in these applications, we report the use of a focused ion beam of Li⁺ to locally insert controlled quantities of lithium with high spatial resolution into electrochemically relevant materials in vacuo. To benchmark the technique, we present results on direct-write lithiation of 35 nm thick crystalline silicon membranes using a 2 keV beam of Li⁺ at doses up to 10¹⁸ cm^-2 (10⁴ nm^-2). We confirm quantitative sub-μm control of lithium insertion and characterize the conco

SUBMITTER: McGehee WR 

PROVIDER: S-EPMC6760045 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature