Unveiling 4d (Ru)-5d (Pt) Charge Compensation for Li-Oxygen/Air Batteries With Ultralow Overpotentials
Jialin Chen1, Jinglin Yang2, Luhai Gai1
1State Key Lab of Crystal Materials, Shandong University, Jinan, People's Republic of China.
Small Methods
|July 21, 2026
Summary
Researchers developed a new catalyst for lithium-oxygen batteries. This catalyst significantly reduces the energy required for charging, improving efficiency and stability for next-generation energy storage.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Lithium-oxygen batteries offer high theoretical energy density for future energy storage.
- Development is limited by high charging overpotentials and poor cycle stability.
Purpose of the Study:
- To address high charging overpotentials in lithium-oxygen batteries.
- To design a catalyst for improved electronic structure and oxygen electrocatalysis.
Main Methods:
- Electronic structure regulation using a Ruthenium (Ru)-modified Platinum on Carbon (Pt/C) catalyst.
- Investigating Ru-Pt orbital coupling and its effect on the d-band distribution of Pt sites.
- Experimental validation of the catalyst's performance in oxygen evolution reactions (OER) and lithium-air batteries.
Main Results:
- Ru-Pt/C catalyst demonstrated a significant reduction in overpotential (∼1 V) compared to Pt/C.
- Electronic structure modification weakened adsorption of oxygen-containing species and smoothed reaction energy barriers.
- Achieved a low overpotential of 0.75 V in a lithium-air battery after 100 cycles.
Conclusions:
- Electronic structure engineering via d-band regulation is effective for oxygen electrocatalysis.
- The Ru-Pt/C catalyst offers a practical solution for mitigating overpotential challenges in high-energy-density metal-air batteries.
- Advances fundamental understanding of catalyst design for improved energy storage.
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