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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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Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution,...
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The electrode interacts with ions in the electrolyte solution at its interface. The rate of oxidation and reduction depends on the speed at which electrons can transfer through this interface. As ions attach to or leave the electrode surface, the electrode acquires a charge, and an electrical potential forms across the interface, making the process more difficult to reach equilibrium. The charge on the electrode affects the local ion concentrations in the solution, though thermal motion...
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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
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Electrolyte Evolution: A Roadmap from Solvation Structure to Next-Generation Batteries.

Chengfeng Li1, Xiangyu Chen2, Lingfei Zhao3

  • 1Institute of Energy Materials Science, University of Shanghai for Science and Technology, Shanghai, 200093, People's Republic of China.

Nano-Micro Letters
|March 10, 2026
PubMed
Summary
This summary is machine-generated.

Improving rechargeable batteries is key for renewable energy storage. New electrolyte designs, by controlling ion behavior, overcome limitations and boost performance for various battery types.

Keywords:
Electrolyte engineeringHigh-concentration electrolytesLocalized high-concentration electrolytesSolvation structureWeakly solvating electrolytes

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Renewable energy requires efficient large-scale electrochemical energy storage (EES).
  • Conventional battery electrolytes face limitations: narrow stability windows, poor low-temperature performance, flammability, and poor high-voltage electrode compatibility.
  • Solvation structure regulation in electrolytes is a critical strategy to address these limitations.

Purpose of the Study:

  • To review key strategies for regulating electrolyte solvation structure in rechargeable batteries.
  • To highlight advancements in various battery chemistries, including Li-ion, Na-ion, Zn-ion, Li-S, Li-air, and Na-S.
  • To summarize future challenges and opportunities in electrolyte design for next-generation energy storage.

Main Methods:

  • Review of five representative electrolyte strategies: highly concentrated, localized high-concentration, weakly solvating, hydrogen-bond regulated, and eutectic electrolytes.
  • Analysis of how these strategies impact battery performance and stability.
  • Synthesis of current research and future outlooks in the field.

Main Results:

  • These electrolyte strategies significantly enhance the performance of multiple battery types (Li-ion, Na-ion, Zn-ion, Li-S, Li-air, Na-S).
  • Control over solvation structure effectively overcomes limitations of conventional dilute electrolytes.
  • Advancements enable wider electrochemical stability windows, better low-temperature performance, and improved safety.

Conclusions:

  • Solvation structure engineering is a powerful approach for developing advanced rechargeable batteries.
  • These strategies are crucial for achieving global decarbonization and carbon neutrality goals.
  • Further research in electrolyte design promises innovative and sustainable energy storage solutions.