Abstract
Solid-state thin-film batteries utilise electrode and electrolyte components which are nanometres or micrometres thick, enabling the production of novel devices with new form factors. Here, in situ X-ray diffraction is used to carry out the first study of a solid-state thin-film lithium-ion battery containing a solid-state LiPON electrolyte and Bi negative electrode. The structure-electrochemistry relationships in the Li-Bi system are revealed and details of cell construction, data collection, and data analysis is presented to guide for research.
Highlights
All-solid-state microbatteries are an interesting development of conventional Li-ion batteries (LIBs), which operate in the same potential window and by similar reaction mechanisms
We focused our study on the following stack: Bi | LiPON | Li, because it constitutes a model stack for in situ analysis, Bi being a heavy element and a crystalline material and a potential candidate to replace Li as a negative electrode in all-solid-state thin film batteries
We report for the first time an in situ X-ray diffraction study of Bi/LiPON/Li allsolid-state cells
Summary
All-solid-state microbatteries are an interesting development of conventional Li-ion batteries (LIBs), which operate in the same potential window and by similar reaction mechanisms. The use of lithium alloy negative electrodes has generally been avoided due to the significant volume changes which occur during the alloying process as a result of lithium insertion/removal (Besenhard et al, 1997). It has been clearly demonstrated that lithium binary alloy systems, especially Li-Si, may have a great interest in all-solid-state thin film configuration despite the large volume variation (300 % from Si to Li15Si4) occurring during Li insertion (Phan et al, 2012).
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