Exploiting Polythiophenyl-Triazine-Based Conjugated Microporous Polymer with Superior Lithium-Storage Performance

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Chemistry

Background:

• Conjugated microporous polymers (CMPs) are recognized for their potential in energy storage due to their tunable properties.
• Existing CMPs offer advantages like chemical flexibility, porous structures, and environmental friendliness.
• Developing advanced polymer anodes is crucial for enhancing lithium-ion battery performance.

Purpose of the Study:

• To synthesize a novel conjugated microporous polymer integrating triazine, thiophene, and benzothiadiazole units.
• To investigate the lithium-ion (Li+) storage performance of this new polymer as an anode material.
• To evaluate its capacity, rate capability, and long-term cyclability for potential use in lithium-ion batteries.

Main Methods:

• Synthesis of a novel conjugated microporous polymer incorporating triazine, thiophene, and benzothiadiazole moieties.
• Electrochemical characterization of the synthesized polymer as an anode in lithium-ion batteries.
• Performance evaluation including capacity, rate tests, and cycling stability measurements.

Main Results:

• The polymer anode achieved a high Li+ storage capacity of 1599 mAh g-1 at 50 mA g-1.
• Excellent rate performance was observed, delivering 363 mAh g-1 at a high current rate of 5 A g-1.
• Remarkable long-term cyclability was demonstrated, retaining 326 mAh g-1 after 1500 cycles at 5 A g-1.

Conclusions:

• The newly developed conjugated microporous polymer exhibits significant potential as a high-performance anode for next-generation lithium-ion batteries.
• The material's structure, featuring a large surface area and abundant redox-active units, contributes to its superior electrochemical performance.
• This research highlights the promise of tailored CMPs for advanced energy storage applications.