Cross-Conjugated Dual-Active-Center Polymer Cathode

High capacity, long lifespan

Simultaneously achieves high potential, large capacity, and ultralong low-temperature cycling in acidic electrolytes, surpassing most reported polymer electrodes.

Li, Jing · Ruan, Wenhong · Lan, Bang · Liu, Cong · Yu, Dingshan

Angewandte Chemie - International Edition 2026

Specifications

Specific capacity

{'zh': '251', 'en': '251'} mAh g^-1

Average reduction potential

{'zh': '0.46', 'en': '0.46'} V vs. SHE

Low-temperature capacity retention

{'zh': '83.8', 'en': '83.8'} %

Full cell average output voltage

{'zh': '1.31', 'en': '1.31'} V

Full cell maximum specific energy

{'zh': '111.7', 'en': '111.7'} Wh kg^-1

Advantages

Higher capacity

The cross-conjugated donor-acceptor structure of PQ enables a specific capacity of 251 mAh g⁻¹, surpassing most reported polymer electrodes.

Ultralong low-temperature lifespan

PQ retains 83.8% capacity after 12,000 cycles at -20 °C, making it suitable for low-temperature applications.

Fast proton transport

PQ exhibits fast Grotthuss-type proton transport in acidic electrolytes, benefiting high-rate performance.

Applications

• Aqueous organic batteries：Use as high-capacity cathode to boost energy density of aqueous batteries
• Low-temperature batteries：Maintains high capacity over 10,000 cycles at -20 °C
• Redox polymers：Cross-conjugated design enhances redox activity
• All-polymer batteries：Pairs with polymer anode to construct all-polymer battery