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Recent progress in sodium/potassium hybrid capacitors.

Jun Yuan1, Xiang Hu, Yangjie Liu

  • 1CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. wen@fjirsm.ac.cn.

Chemical Communications (Cambridge, England)
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PubMed
Summary

Metal ion hybrid capacitors offer high energy and power, but face kinetics challenges. This review covers sodium and potassium ion hybrid capacitors, discussing materials, challenges, and future research directions for high-performance devices.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Metal ion hybrid capacitors (MIHCs) combine battery energy density with supercapacitor power output.
  • Kinetics mismatch between battery-type anodes and capacitor-type cathodes is a key challenge for MIHCs.

Purpose of the Study:

  • To provide an overview of recent advancements in sodium and potassium ion hybrid capacitors (SIHCs and PIHCs).
  • To discuss current challenges and future research directions for MIHCs.
  • To guide new researchers and inspire experienced ones in the field of high-performance MIHC devices.

Main Methods:

  • Review of fundamental knowledge and historical development of MIHCs.
  • Emphasis on the development and variety of electrode materials for SIHCs and PIHCs.
  • Analysis of challenges and future prospects for practical MIHC applications.

Main Results:

  • Significant progress has been made in developing electrode materials for SIHCs and PIHCs.
  • Kinetics mismatch remains a critical hurdle for practical MIHC implementation.
  • The review highlights diverse electrode materials and their impact on performance.

Conclusions:

  • MIHCs are promising for next-generation energy storage, requiring further research to overcome kinetics limitations.
  • Future research should focus on advanced electrode materials and device engineering for high-performance SIHCs and PIHCs.
  • This review serves as a guide for developing practical, high-performance MIHC devices.