Enhancing Intrinsic Reactivity and Durability of Zn‐Doped Cobalt Carbonate Hydroxide via d‐d Interaction Modulation for Alkaline Zinc Batteries

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Zn-doping enhances redox activity and cycling stability in alkaline batteries, suggesting new design strategies.

The Zn-doped cobalt carbonate hydroxide cathode delivers an ultrahigh capacity of 1.52 mAh cm−2 at 2 mA cm−2, significantly outperforming its predecessor.
It shows a remarkable 88.4% capacity retention after 4500 cycles at −20 °C, indicating substantial durability in harsh conditions.
Analysis using density functional theory reveals that Zn doping optimizes the redox activity by altering the d-band center of cobalt, which stabilizes its function.
This approach may create a new standard for developing high-efficiency cathodes in alkaline zinc-based batteries, possibly changing future battery design.

Xie et al. (2025) studied this question.

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Zn-doping enhances redox activity and cycling stability in alkaline batteries, suggesting new design strategies.

The Zn-doped cobalt carbonate hydroxide cathode delivers an ultrahigh capacity of 1.52 mAh cm−2 at 2 mA cm−2, significantly outperforming its predecessor.
It shows a remarkable 88.4% capacity retention after 4500 cycles at −20 °C, indicating substantial durability in harsh conditions.
Analysis using density functional theory reveals that Zn doping optimizes the redox activity by altering the d-band center of cobalt, which stabilizes its function.
This approach may create a new standard for developing high-efficiency cathodes in alkaline zinc-based batteries, possibly changing future battery design.

Xie et al. (2025) studied this question.

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