Constructing binder-free Bi<sub>2</sub>O<sub>3</sub>@nitrogen-doped carbon nanotubes aerogel cathodes to boost polyiodide conversion kinetics by Bi-N bonds

Wan Jiajun; Tian Jiyang; Zhang Qian; Liu Jie

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Constructing binder-free Bi₂O₃@nitrogen-doped carbon nanotubes aerogel cathodes to boost polyiodide conversion kinetics by Bi-N bonds

Updated：2026-08-24

- Constructing binder-free Bi₂O₃@nitrogen-doped carbon nanotubes aerogel cathodes to boost polyiodide conversion kinetics by Bi-N bonds
- Chinese Journal of Chemical Engineering Vol. 94, Issue 6, Pages: 128-137(2026)
- Affiliations：
  
  Youth Innovation Team of Shandong Higher Education Institutions, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
  Weifang Key Laboratory of Green Processing of Separator for Chemical Power Sources, School of Chemistry and Engineering, Weifang Vocational College, Weifang 261108, China
- Author bio：
  
  Corresponding author. E-mail address: jie.liu@qust.edu.cn(J. Liu)
- Funds：
- DOI：
  CLC：
- Received：19 September 2025，
  
  Revised：2026-01-06，
  
  Accepted：14 January 2026，
  
  Online First：30 March 2026，
  
  Published：2026-06
- Accepted：
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Wan Jiajun, Tian Jiyang, Zhang Qian, et al. Constructing binder-free Bi₂O₃@nitrogen-doped carbon nanotubes aerogel cathodes to boost polyiodide conversion kinetics by Bi-N bonds[J]. Chinese Journal of Chemical Engineering, 2026, 94(6): 128-137.
DOI：

Wan Jiajun, Tian Jiyang, Zhang Qian, et al. Constructing binder-free Bi₂O₃@nitrogen-doped carbon nanotubes aerogel cathodes to boost polyiodide conversion kinetics by Bi-N bonds[J]. Chinese Journal of Chemical Engineering, 2026, 94(6): 128-137. DOI：

摘要

Abstract

Developing renewable green energy is one of key approaches to achieve dual carbon goals

which is supported by high-efficiency energy storage technologies. Aqueous Zn-I

batteries (AZIBs) are quite promising grid energy storage systems due to their intrinsic safety and low cost

but are plagued by polyiodide shuttling and sluggish conversion kinetics. To tackle the issues

a binder-free Bi

@N-CNTs aerogel elec

trode with hierarchical pore structure has been developed

featured by Bi

nanoparticles embedded in the N-doped CNTs matrix. Removing of polymer binder not only reduces the inactive component in the electrode but also avoids covering active sites. Notably

polyiodide affinity and catalytic capability of novel Bi

electrocatalyst can be enhanced significantly

via

the formation of Bi-N bonds

which has been demonstrated by the X-ray photoelectron spectroscopy and systematic electrochemical tests. The resultant AZIB demonstrates superior cycling stability

maintaining a capacity of 148.7 mA·h·g

- 1

after 5000 cycles with a high capacity retention of 87.1%. Specially

the high-loading pouch cell can also deliver a stable capacity of 2mA·h over 40 cycles with an areal loading of 10 mg·cm

- 2

highlighting the practicality of the Bi

@N-CNTs aerogel electrode.

关键词

Keywords

references

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⁰

Constructing binder-free Bi2O3@nitrogen-doped carbon nanotubes aerogel cathodes to boost polyiodide conversion kinetics by Bi-N bonds

DOI：

摘要

Abstract

关键词

Keywords

references

Constructing binder-free Bi₂O₃@nitrogen-doped carbon nanotubes aerogel cathodes to boost polyiodide conversion kinetics by Bi-N bonds