Donor-Biacceptor Covalent Organic Framework

Zero decay over 1000 cycles

A built-in electric field synergizes dual functional sites to accelerate sulfur conversion and induce uniform lithium deposition, addressing both shuttle effect and dendrite formation.

Guo, Feng · Wang, Jiayi · 74475154 · Nie, Yihang · Chengjiao, Zhao · Longjie, He · Xuancheng, Liu · Yiting, Shao · Qingying, Li · Zong, Kai · Jin, Mingliang · Jiawei, He · Luo, Dan · Wang, Xin · Chen, Zhongwei

Advanced Energy Materials 2026

Specifications

Li symmetric cell lifespan

{'zh': '16000', 'en': '16000'} h

Capacity decay per cycle

{'zh': '0.039', 'en': '0.039'} %

Pouch cell energy density

{'zh': '395.6', 'en': '395.6'} Wh kg⁻¹

Capacity retention

{'zh': '90.2', 'en': '90.2'} %

Advantages

Mitigated shuttle effect

Primary and auxiliary functional groups synergistically enable selective LiPSs capture, anchoring them on the cathode side to reduce active material loss.

Accelerated redox kinetics

The built-in electric field facilitates electron transfer, reducing conversion energy barriers and accelerating redox reactions of LiPSs.

Dendrite-free lithium deposition

Anchoring of the ─NO₂ group and the effect of the ─CF₃ group induce directional Li⁺ deposition, ensuring epitaxial layered growth and suppressed dendrite formation.

Applications

• Li-S batteries：Replace conventional carbon-sulfur cathodes to suppress shuttle and extend cycle life.
• Battery separators：Coat on separator to selectively intercept polysulfides and enhance conversion.