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Related Experiment Video

Updated: Jul 16, 2026

Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
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In Situ Grown n-Type Conducting Polymer Interface Enabling High-Performance Lithium-Ion Batteries With Enhanced

Yining Wang1, Zhenfei Li2, Qichao Zhang1

  • 1Institute of Polymer Optoelectronic Materials and Devices, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.

Small (Weinheim an Der Bergstrasse, Germany)
|July 15, 2026
PubMed
Summary

Researchers enhanced lithium-ion batteries (LIBs) using poly(benzodifurandione) (PBFDO) for improved conductivity and lithium-ion redox activity. This modification boosts energy density, charge/discharge rates, and stability for next-generation energy storage.

Keywords:
high‐rate capabilityinterface modificationionic–electronic transport networklithium‐ion batterieslow‐temperature operationn‐type conducting polymers

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Lithium-ion batteries (LIBs) face increasing demand for higher energy density, faster charge/discharge rates, and improved stability.
  • Lithium iron phosphate (LiFePO4, LFP) cathodes, while common, suffer from slow Li+ redox kinetics and poor conductivity, limiting battery performance.

Purpose of the Study:

  • To introduce an n-type conducting polymer, poly(benzodifurandione) (PBFDO), for interfacial modification of LFP cathodes.
  • To enhance the electrochemical performance of LIBs by improving ionic-electronic transport properties.

Main Methods:

  • In situ formation of an n-type conducting polymer interface on LFP.
  • Electrochemical performance testing, including specific capacity measurements at various C-rates and low-temperature conditions.
  • Fabrication and testing of large-size pouch cells.

Main Results:

  • The in situ PBFDO interface demonstrated superior cycling performance and rate capability compared to post-deposition methods.
  • Achieved a specific capacity of 194 mAh g-1 at 1C and maintained 92 mAh g-1 at 50C.
  • Significantly enhanced low-temperature performance (-20°C) with 93 mAh g-1 at 5C and improved rate performance in large-size pouch cells (128 mAh g-1 at 5C).

Conclusions:

  • The developed n-type conducting polymer PBFDO effectively enhances the energy density and rate performance of LIBs.
  • In situ interfacial modification with PBFDO offers a promising strategy for advancing next-generation energy storage systems.
  • Improved ionic-electronic transport properties are key to achieving superior battery performance, especially under demanding conditions.