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Updated: Jan 17, 2026
08:18
Protocol of Electrochemical Test and Characterization of Aprotic Li-O2 Battery
Published on: July 12, 2016
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Stabilizing Lattice Oxygen via Interfacial B-O Complexing for a 4.6 V LiCoO2 Cathode
Jimin Qiu1, Yuchen Ji1, Wenfang Li2
1School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
ACS Nano
|September 16, 2025
Summary
High-voltage lithium cobalt oxide cathodes are stabilized using a B-O complexing strategy. This method prevents oxygen loss and cobalt dissolution, enhancing battery performance and stability.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Lithium cobalt oxide (LiCoO2) cathodes exhibit structural instability at high voltages (>4.5 V).
- This instability involves phase transitions, cobalt dissolution, and interfacial reactions, linked to unstable surface lattice oxygen.
Purpose of the Study:
- To stabilize the surface lattice oxygen of LiCoO2 at 4.6 V.
- To mitigate structural degradation and improve the electrochemical performance of high-voltage LiCoO2 cathodes.
Main Methods:
- An interfacial B-O complexing strategy using tris(pentafluorophenyl)borane electrolyte additive.
- In situ and ex situ characterization techniques with temporal and spatial resolution.
Main Results:
- The B-O complexing strategy effectively stabilized surface lattice oxygen by inhibiting peroxy-like species (O2^2-).
- Oxygen loss and interfacial side reactions were significantly retarded, preserving cobalt's chemical environment.
- Phase transitions and coordination structure changes were suppressed, improving capacity retention and rate performance.
Conclusions:
- The interfacial B-O complexing strategy successfully stabilizes high-voltage LiCoO2 cathodes.
- This approach offers a pathway to enhance the durability and efficiency of advanced lithium-ion batteries.
Keywords:
Li-ion batterieselectrolyte modificationhigh-voltage LiCoO2interfacial B−O complexingsurface lattice oxygenMore Related Videos
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