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Published on: August 12, 2013
Durable and Self-Charging Aluminum-Organic Battery Based on Conjugated Ladder Polymer
Qing Lang1, Jiahui Ye1,2, Jiayuan Yu1,2
1Zhejiang Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology, Materials Tech Laboratory for Hydrogen & Energy Storage, Ningbo Institute of Materials Technology and Engineering (NIMTE) of the Chinese Academy of Sciences (CAS), Ningbo, People's Republic of China.
Small (Weinheim an Der Bergstrasse, Germany)
|July 24, 2026
Summary
A novel polymer cathode enhances Aluminum-organic batteries (AOBs) with exceptional stability and self-charging capabilities. This breakthrough addresses key challenges in organic battery design for improved performance.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Organic materials offer sustainable and flexible options for Aluminum-organic batteries (AOBs).
- Challenges include high solubility and dependence on conductive additives, limiting practical applications.
- Developing stable organic cathodes is crucial for durable and efficient AOBs.
Purpose of the Study:
- To introduce a novel conjugated ladder polymer, poly(benzimidazo-benzophenanthroline) (BBL), as a stable cathode material for AOBs.
- To investigate the electrochemical performance, stability, and self-charging behavior of BBL-based cathodes.
- To elucidate the charge storage mechanism and identify active redox sites in the BBL cathode.
Main Methods:
- Synthesis and characterization of the poly(benzimidazo-benzophenanthroline) (BBL) polymer.
- Fabrication of freestanding BBL cathodes with carbon nanotube additives.
- Electrochemical testing including cycling stability, rate capability, and anti-self-discharge measurements.
- Spectroscopic and electrochemical analyses to determine charge carriers and redox-active sites.
Main Results:
- The BBL cathode demonstrated remarkable cycling stability over 10,000 cycles with a reversible capacity of 117 mAh/g.
- Excellent rate performance and stability were observed across a wide temperature range (-20°C to 100°C).
- A unique room-temperature self-charging function was observed, reaching up to 82% capacity without external energy input.
- AlCl2+ was identified as the charge carrier, with C═O groups in BBL acting as redox-active sites.
Conclusions:
- The rigid, fused-ring structure of BBL prevents dissolution and facilitates fast charge transfer, leading to high stability.
- BBL represents a promising organic cathode material for developing durable, high-performance, and self-charging Aluminum-organic batteries.
- Advanced polymer structure design is critical for overcoming limitations in organic battery technology.
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