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Cyclically Regenerated Solid-State Bulk-Phase Electrocatalyst for Fast-Charging Lithium-lon Batteries.

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  • 1State Key Laboratory of Cardiovascular Diseases Shanghai East Hospital School of Medicine, Tongji University, Shanghai, 200092, P. R. China.

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Summary

This study introduces cobalt atom clusters (Coac) as a novel solid-state catalyst for fast-charging lithium-ion batteries (LIBs). These catalysts accelerate reactions in ZnSe anodes, overcoming previous limitations in battery performance.

Keywords:
fast‐charginglithium‐ion batteriesmetal atomic clustersregenerated electrocatalystsolid/solid conversion reaction

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Catalysts are crucial for reaction kinetics in energy conversion and storage.
  • Applications in lithium-ion batteries (LIBs) are limited by solid-solid conversion reactions and catalyst instability.
  • Electrochemical instability and passivation hinder catalyst performance during battery cycling.

Purpose of the Study:

  • To develop a novel solid-state bulk-phase electrocatalyst for fast-charging LIBs.
  • To address challenges in solid-state catalyst design for bulk electrode materials.
  • To enhance the electrochemical performance of ZnSe anodes in LIBs.

Main Methods:

  • Designed a heterostructure of bimetallic selenides (CoSe-ZnSe) as an anode material.
  • Investigated the cyclic regeneration of Co atom clusters (Coac) during lithiation.
  • Evaluated the catalytic efficiency, stability, and anti-passivation properties of the Coac catalyst.

Main Results:

  • Co atom clusters (Coac) were cyclically regenerated from the CoSe-ZnSe anode.
  • The Coac catalyst significantly accelerated conversion reactions in the ZnSe anode.
  • The LIBs exhibited high rate capability (up to 50 A g-1) and long-term cyclability (3000 cycles at 10 A g-1).

Conclusions:

  • The proposed strategy successfully overcomes bottlenecks in solid-state bulk-phase catalyst design.
  • Coac catalysts demonstrate high efficiency, full-voltage stability, and anti-passivation.
  • This approach enables fast-charging and long-cycle life for LIBs using ZnSe anodes.