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Batteries and Fuel Cells03:12

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Achieving 1300 Wh/L in Anode-Free Li Batteries With Integrated 3D Printed Cathode and Electrolyte.

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  • 1Key Laboratory of Flexible Optoelectronic Materials and Technology, School of Optoelectronic Materials & Technology, Ministry of Education, Jianghan University, Wuhan, P. R. China.

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Summary

Researchers developed a novel anode-free lithium battery with an ultra-thick cathode and a specialized electrolyte. This design achieves high energy density and stable cycling, paving the way for advanced electric aviation applications.

Keywords:
anode‐free Li batteriesdual‐salt electrolyteelastic‐plastic SEIhigh volumetric energy densityultra‐thick cathode

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Anode-free lithium batteries offer high volumetric energy density.
  • Challenges include side reactions and limited lithium reservoirs with ultra-thick cathodes.

Purpose of the Study:

  • To develop a high-energy, safe anode-free pouch cell using a 3D-printed ultra-thick cathode.
  • To overcome limitations of current anode-free battery technologies.

Main Methods:

  • Fabrication of a pouch cell with a 3D-printed ultra-thick cathode (120 mg cm⁻²).
  • Utilized a dual-salt/dual-solvent electrolyte to form a stable solid-electrolyte interphase (SEI).
  • Investigated lithium plating/stripping reversibility on bare copper current collectors.

Main Results:

  • Achieved exceptional energy densities of 1,308 Wh L⁻¹ and 424 Wh kg⁻¹.
  • Demonstrated a high areal capacity of 19.11 mAh cm⁻².
  • Exhibited stable prolonged cycling and reversible lithium deposition/stripping, even at low temperatures.

Conclusions:

  • The developed electrolyte promotes an elastic-plastic SEI for stable lithium cycling.
  • This scalable and cost-effective approach advances anode-free battery commercialization.
  • Potential applications include electric aviation and the low-altitude economy.