Abstract
Li loss during cycling at the solid electrolyte∣anode interface strongly determines the cycle life of anode-free solid-state batteries (SSBs). Here, this loss is probed electroanalytically for polymer electrolyte (PE)-based SSBs in anode-free coin cells with practical pressures. A wide range of parameters expected to impact the measured average coulombic efficiency (CE) were explored to estimate the expected range of performance. These factors include PE type, cycling profiles, current collector type, and the presence of a thin Li seed layer. Low CE values in the ∼50%-85% range are observed for all electrolytes and test conditions. Other than the electrolyte type, a strong dependence of the CE on the electrochemical cycling profile and the type of metallic current collector is observed. Compared to the anode-free setup, the presence of a thin (5 μm) Li seed layer did not improve the average CE for two out of three PEs, suggesting its presence to be a weak contributor in minimizing the Li loss. This work provides baseline data on the Li losses in low-pressure anode-free configuration cells with PEs.
| Original language | English |
|---|---|
| Article number | 050505 |
| Journal | Journal of the Electrochemical Society |
| Volume | 171 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 1 2024 |
Funding
This work was funded by the Department of Energy’s Office of Energy Efficiency and Renewable Energy for the Vehicle Technologies Office’s US-German Cooperation on Energy Storage: Lithium-Solid-Electrolyte Interfaces (LISI) program. In this context, A.M., D.S. and D.B. would like to acknowledge financial support from the German Federal Ministry of Education and Research (BMBF) within the LISI-2 project (03XP0509D). This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This work was funded by the Department of Energy’s Office of Energy Efficiency and Renewable Energy for the Vehicle Technologies Office’s US-German Cooperation on Energy Storage: Lithium-Solid-Electrolyte Interfaces (LISI) program. In this context, A.M., D.S. and D.B. would like to acknowledge financial support from the German Federal Ministry of Education and Research (BMBF) within the LISI-2 project (03XP0509D). This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05–00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).
Keywords
- anode-free
- coulombic efficiency
- polymer electrolyte
- solid-state batteries