Abstract
The prevalence of sodium over lithium prompts exploration of sodium-ion batteries (SIBs) as a viable alternative to lithium-ion batteries (LIBs). Hard carbon has emerged as a promising anode material for SIBs, yet its synthesis poses sustainability challenges and emits pollutants. Here, we introduce CO2-derived porous carbon (graphitic and amorphous) as an anode for SIBs via electrochemical reduction of CO2 in a molten eutectic carbonate salt at a lower temperature that yields materials with controlled microstructure, morphology, and porosity conducive to energy storage. Our CO2-derived carbon demonstrates remarkable specific capacity, superior rate capability, and stable cycling performance as a SIB anode. This innovative strategy harnesses waste CO2 toward advancing SIB energy technology.
| Original language | English |
|---|---|
| Pages (from-to) | 7385-7394 |
| Number of pages | 10 |
| Journal | ACS Sustainable Chemistry and Engineering |
| Volume | 13 |
| Issue number | 20 |
| DOIs | |
| State | Published - May 26 2025 |
Funding
This research at Oak Ridge National Laboratory, managed by UT Battelle LLC for the US Department of Energy (DOE), was sponsored by the DOE Office of Fossil Energy and Carbon Management (FECM). The electrochemical characterization work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, under the contract number DE-AC05-00OR22725. The microscopy work was supported by an Early Career project supported by the DOE Office of Science FWP #ERKCZ55-KC040304. All microscopy technique development was performed and supported by Oak Ridge National Laboratory\u2019s (ORNL) Center for Nanophase Materials Sciences (CNMS), which is a DOE Office of Science User Facility. This research at Oak Ridge National Laboratory, managed by UT Battelle LLC for the US Department of Energy (DOE), was sponsored by the DOE Office of Fossil Energy and Carbon Management (FECM). The electrochemical characterization work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, under the contract number DE-AC05-00OR22725. The microscopy work was supported by an Early Career project supported by the DOE Office of Science FWP #ERKCZ55-KC040304. All microscopy technique development was performed and supported by Oak Ridge National Laboratory\u2019s (ORNL) Center for Nanophase Materials Sciences (CNMS), which is a DOE Office of Science User Facility. This research at Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the US Department of Energy (DOE), was sponsored by the DOE Office of Fossil Energy and Carbon Management (FECM). This manuscript has been authored in part by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE) and supported by the DOE Office of Fossil Energy. The publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The DOE will provide public access to these results of federally sponsored research under the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).
Keywords
- CO-derived carbon
- electrochemical CO conversion
- energy storage materials
- eutectic carbonate melts
- sodium-ion anode
- sodium-ion batteries (SIBs)