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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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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Hydrogel Electrolytes for Quasi-Solid Zinc-Based Batteries.

Kang Lu1, Tongtong Jiang1, Haibo Hu1

  • 1School of Physics and Materials Science, Photoelectric Conversion Energy Materials and Devices Key Laboratory of Anhui Province, Anhui University, Hefei, China.

Frontiers in Chemistry
|December 17, 2020
PubMed
Summary
This summary is machine-generated.

Quasi-solid zinc-based batteries utilize hydrogel electrolytes for enhanced safety and energy density. Functionalized hydrogels offer improved ionic conductivity, durability, and unique properties for advanced energy storage applications.

Keywords:
electrolyteshydrogelself-healingstretchabilityzinc-based batteries

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Zinc-based batteries offer high energy density and safety due to aqueous electrolytes.
  • Hydrogels serve as polymer hosts for aqueous electrolytes, creating quasi-solid-state systems.
  • Hydrogel properties like water retention and electrolyte load capacity are crucial for performance.

Purpose of the Study:

  • To review the frontier disciplines of hydrogel electrolytes for zinc-based batteries.
  • To discuss the cross-linking processes and functionalization of hydrogel materials.
  • To evaluate the application of functionalized hydrogel electrolytes in zinc-based batteries.

Main Methods:

  • Review of existing literature on hydrogel electrolytes for zinc-based batteries.
  • Analysis of polymer network cross-linking for functional hydrogels (stretchability, compressibility, self-healing).
  • Presentation of electrochemical and mechanical performance data of batteries with functionalized hydrogel electrolytes.

Main Results:

  • Hydrogel electrolytes enhance ionic conductivity and durability of quasi-solid zinc-based batteries.
  • Functionalized hydrogels can impart properties like stretchability and self-healing to electrolytes.
  • Performance under extreme conditions highlights the critical role of polymer hydrogel electrolytes.

Conclusions:

  • Hydrogel electrolytes are vital for advancing quasi-solid zinc-based battery technology.
  • Tuning hydrogel chemistry enables diverse functionalities for various applications.
  • Addressing current challenges is key to the commercialization of hydrogel-based zinc batteries.