Breakthrough in Energy Storage: Researchers Develop High-Performance Zn-ion Batteries

Strategic Insights -

Researchers from the CSIR - Central Mechanical Engineering Research Institute have made a significant breakthrough in energy storage by developing high-performance Zn-ion batteries. According to the study, rechargeable aqueous zinc-ion batteries (RAZIBs) are a promising option for future grid energy storage devices due to their high theoretical/volumetric capacity, inherent safety, and cost-effectiveness. However, the performance of RAZIBs is impeded by a lack of suitable cathode materials and electrolytes.

The researchers have successfully developed a layered VS4@(NH4)2V6O16 cathode through a facile hydrothermal process, which is used in conjunction with a 2 M Zn(OTf)2 electrolyte in a water/acetonitrile mixture. The assembled RAZIB showed a high specific capacity of 354 mA h g-1 and a high energy density of 244.3 W h kg-1 at a current density of 0.3 A g-1. Moreover, the battery has retained 51% capacity after 30,000 cycles when cycled with a specific current of 20 A g-1.

This research paves the way for choosing the appropriate cathode material and electrolyte composition for high-performance RAZIBs. The study's findings have been published in the journal ACS Applied Energy Materials.

Key Takeaways:

  • The researchers have developed a high-performance VS4@(NH4)2V6O16 cathode for rechargeable aqueous zinc-ion batteries (RAZIBs).
  • The assembled RAZIB showed a high specific capacity of 354 mA h g-1 and a high energy density of 244.3 W h kg-1 at a current density of 0.3 A g-1.
  • The battery has retained 51% capacity after 30,000 cycles at a specific current of 20 A g-1.
  • The development of high-performance RAZIBs has significant implications for future grid energy storage devices.
  • The researchers used a facile hydrothermal process to construct the VS4@(NH4)2V6O16 cathode, which is a cost-effective and eco-friendly method.
  • The study's findings have been peer-reviewed and published in the journal ACS Applied Energy Materials.

Statistics:

  • The VS4@(NH4)2V6O16 cathode showed a high specific capacity of 354 mA h g-1.
  • The assembled RAZIB showed a high energy density of 244.3 W h kg-1 at a current density of 0.3 A g-1.
  • The battery retained 51% capacity after 30,000 cycles at a specific current of 20 A g-1.
  • The study used a 2 M Zn(OTf)2 electrolyte in a water/acetonitrile mixture.

Sources:

  • Solvent-guided Morphology Optimization Strategy In the Vs 4 @(Nh 4 ) 2 v 6 o 16 Cathode for High-performance Zn-ion Batteries. Acs Applied Energy Materials, 2025;8(14):10126-10139.
  • Researchers from CSIR - Central Mechanical Engineering Research Institute Detail Findings in Energy Materials [Solvent-guided Morphology Optimization Strategy In the Vs 4 @(Nh 4 ) 2 v 6 o 16 Cathode ...]. Energy Weekly News. August 29, 2025; p 385.