biostudies-literatureNa DMinistry of Trade, Industry and EnergyJeonbuk National University1894https://www.ebi.ac.uk/biostudies/studies/S-EPMC11643571biostudies-literatureUnknown14(23)Li-CO₂ batteries (LCBs) have emerged as promising solutions for energy storage, with the added benefit of contributing to carbon neutrality by capturing and utilizing CO₂ during operation. In this study, a high-performance LCB was developed using a Ge-doped LiAlGeTi (PO₄)₃ (LAGTP) solid electrolyte, which was synthesized via a solution-based method by doping Ge into NASICON-type LATP. The ionic conductivity of the LAGTP pellets was measured as 1.04 × 10^-3 S/cm at 25 °C. The LCB utilizing LAGTP and an MWCNT/Ru cathode maintained a stable cycling performance over 200 cycles at a current density of 100 mA/g, with a cut-off capacity of 500 mAh/g. Post-cycle analysis confirmed the reversible electrochemical reactions at the cathode. The intNanomaterials (Basel, Switzerland)Enhancing the Performance and Stability of Li-CO<sub>2</sub> Batteries Through LAGTP Solid Electrolyte and MWCNT/Ru Cathode Integration.PMC11643571the BK21 FOUR ProgramRS-2024-00419781Na DKim HSeo IYoon BLee DDYu DfalseEnhancing the Performance and Stability of Li-CO<sub>2</sub> Batteries Through LAGTP Solid Electrolyte and MWCNT/Ru Cathode Integration.Li-CO₂ batteries (LCBs) have emerged as promising solutions for energy storage, with the added benefit of contributing to carbon neutrality by capturing and utilizing CO₂ during operation. In this study, a high-performance LCB was developed using a Ge-doped LiAlGeTi (PO₄)₃ (LAGTP) solid electrolyte, which was synthesized via a solution-based method by doping Ge into NASICON-type LATP. The ionic conductivity of the LAGTP pellets was measured as 1.04 × 10^-3 S/cm at 25 °C. The LCB utilizing LAGTP and an MWCNT/Ru cathode maintained a stable cycling performance over 200 cycles at a current density of 100 mA/g, with a cut-off capacity of 500 mAh/g. Post-cycle analysis confirmed the reversible electrochemical reactions at the cathode. The int2024-01-01T00:00:00Z2024 Nov2025-04-04T02:32:39.052Z2025-04-04T02:32:39.052ZS-EPMC116435713968328210.3390/nano14231894