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Self-Adaptive Interface Reconstruction over Black Phosphorus Complex for Wide-Temperature and Fast-Charging Potassium

Guohui Qin1, Hao Xu1, Mingbo Wu1

  • 1Shandong Key Laboratory of Advanced Electrochemical Energy Storage Technologies, State Key Laboratory of Advanced Optical Polymer and Manufacturing Technology, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao, 266042, P.R. China.

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Summary

This study introduces a novel self-adaptive interface reconstruction strategy for black phosphorus (BP) to enhance potassium-ion battery performance. The new method significantly improves kinetics, stability, and cycle life for high-performance energy storage devices.

Keywords:
Black phosphorus anodeFast chargingPotassium‐ion batteryWide‐temperature operation

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Black phosphorus (BP) shows promise for K+ storage due to its large layer spacing and high capacity.
  • However, BP suffers from structural instability and poor kinetics, limiting its application in high-performance batteries.

Purpose of the Study:

  • To develop a strategy for enhancing the kinetics and stability of black phosphorus for potassium-ion storage.
  • To overcome the limitations of BP in fast charging and wide-temperature operation.

Main Methods:

  • A self-adaptive interface reconstruction with multiple secondary bonds mediation (IRSM) strategy was employed.
  • Black phosphorus nanospheres were encapsulated in a B-doped carbon matrix (BC) and grafted with polybromoisobutyryloxy benzenesulfonic (PBBS).
  • In situ polymerization transformed PBBS into a metal-organic bromoisobutyrylox supramolecular (PBS) complex, forming BC@BP@PBS.

Main Results:

  • The BC@BP@PBS composite demonstrated excellent fast charging capabilities.
  • The material exhibited stable operation across a wide temperature range (-70 °C to 80 °C).
  • An extended cycle life of up to 1300 cycles was achieved, showcasing improved stability.

Conclusions:

  • The IRSM strategy effectively addresses the trade-offs between fast charging, wide-temperature operation, and long cycle life in potassium-ion batteries.
  • This work presents an innovative approach for developing high-performance energy storage devices using modified black phosphorus.
  • The developed BC@BP@PBS material offers a promising solution for advanced battery applications.