A Truxenone-based Covalent Organic Framework as an All-Solid-State Lithium-Ion Battery Cathode with High Capacity

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• All-solid-state lithium-ion batteries (LIBs) offer enhanced safety and stability for energy storage.
• A key challenge is the limited availability of effective electrode active materials.

Purpose of the Study:

• To introduce a novel truxenone-based covalent organic framework (COF-TRO) as a cathode material for all-solid-state LIBs.
• To evaluate the electrochemical performance and stability of COF-TRO.

Main Methods:

• Synthesis and characterization of the truxenone-based covalent organic framework (COF-TRO).
• Electrochemical testing of COF-TRO as a cathode material in all-solid-state LIBs.

Main Results:

• COF-TRO achieved a high specific capacity of 268 mAh g⁻¹, representing 97.5% of its theoretical capacity.
• Demonstrated excellent cycling stability with 99.9% capacity retention after 100 cycles at 0.1 C.
• Achieved the highest capacity among reported COF-based cathode materials for all-solid-state LIBs.

Conclusions:

• Truxenone-based COFs, exemplified by COF-TRO, are promising cathode materials for high-performance all-solid-state LIBs.
• The material's structure and carbonyl groups facilitate efficient lithium-ion storage.
• COF-TRO exhibits significant potential for next-generation energy storage solutions.