Sign in Subscribe
Batteries

Breakthrough in Energy Storage: Novel Covalent Organic Polymers for Li-ion Batteries

Strategic Insights

— 2 min read

A team of researchers from Sun Yat-sen University has made a significant discovery in the field of energy storage, developing a novel class of mesoporous covalent organic polymer (COP) that can be used as efficient 18-electron-redox anodes for superior Li-ion storage in both coin-type and fiber-type batteries. The newly produced TF-Azo-COP possesses multiple redox sites, enabling fast electron transfer and facilitated ion diffusion, resulting in a high coefficient of up to 10^(-10) cm^2 s^(-1). When paired with metal Li, the coin cell exhibits good cycling stability and a large reversible capacity of 795.4 mAh g^(-1) at 0.1 A g^(-1), representing one of the best performances among reported organic electrodes.

Key Takeaways:

  • The researchers have developed a novel class of mesoporous covalent organic polymer (COP) called TF-Azo-COP, which exhibits 18-electron-redox anode behavior.
  • TF-Azo-COP features multiple redox sites, enabling fast electron transfer and facilitated ion diffusion, resulting in a high coefficient up to 10^(-10) cm^2 s^(-1).
  • The coin cell using TF-Azo-COP as the anode exhibits good cycling stability and a large reversible capacity of 795.4 mAh g^(-1) at 0.1 A g^(-1).
  • The assembled fiber cell delivers an excellent combination of linear capacity (0.23 mAh cm^(-1)), energy density (0.55 mWh cm^(-1)), cycling stability (250 cycles), and good flexibility.
  • The researchers have demonstrated the superiority of TF-Azo-COP as an anode material compared to other reported organic electrodes in terms of performance.
  • The findings have significant implications for the development of high-performance Li-ion batteries.
  • The research has been peer-reviewed and published in the journal ENERGY & ENVIRONMENTAL MATERIALS.

Statistics:

  • The reversible capacity of the coin cell using TF-Azo-COP as the anode is 795.4 mAh g^(-1) at 0.1 A g^(-1).
  • The linear capacity of the assembled fiber cell is 0.23 mAh cm^(-1).
  • The energy density of the assembled fiber cell is 0.55 mWh cm^(-1).
  • The cycling stability of the assembled fiber cell is 250 cycles.

Sources:

  • Energy & Environmental Materials, 2025.
  • Transforming Mesoporous Covalent Organic Polymers Into Efficient 18-electron-redox Anodes Via Redox Site Engineering for Superior Li-ion Storage.
  • Wiley, 111 River St, Hoboken 07030-5774, NJ, USA.
  • Cong Liu, Sun Yat-sen University, School of Chemistry, Ministry of Education, Guangzhou 510006, People's Republic of China.
  • Fujie Liu, Yaozheng Pan, Jicheng Cai, Linfeng Zhong, Yi Lin, Dingshan Yu, and Fan Yang.

Read more