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Weak Acid Solutions

Weak Acid Solutions

Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

New Class of LAGP-Based Solid Polymer Composite Electrolyte for Efficient and Safe Solid-State Lithium Batteries.

Qingpeng Guo¹, Yu Han¹, Hui Wang¹

¹College of Aerospace Science and Engineering, National University of Defence Technology , Changsha, Hunan 410073, China.

ACS Applied Materials & Interfaces

|November 14, 2017

Summary

This study introduces a novel composite solid electrolyte for safer, high-energy solid-state lithium batteries. The new electrolyte enhances ionic conductivity and lithium electrode compatibility, suppressing dendrite growth.

Keywords:

compatibility flexible membrane ionic conductor ionic liquid nonflammable solid composite electrolyte

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Inorganic solid electrolytes (SEs) offer safety and stability for solid-state Li batteries.
Challenges include complex processing and poor interfacial contact between SEs and active materials.

Purpose of the Study:

To develop a composite solid electrolyte with improved interfacial properties and ionic conductivity.
To address limitations in current solid-state lithium battery technology.

Main Methods:

Fabrication of a composite electrolyte using Li_1+xAl_xGe_2-x(PO₄)₃ (LAGP) ceramic and P(VDF-HFP) polymer matrix.
Incorporation of a stable ionic liquid into the polymer matrix to enhance interfacial compatibility.
Characterization of ionic conductivity, mechanical strength, and electrochemical performance.

Main Results:

The composite electrolyte (LPELCE) exhibits good ionic conductivity and compatibility with Li electrodes.
Reduced polymer crystallinity and enhanced interfacial properties were observed.
The electrolyte demonstrated high mechanical strength, a stable solid electrolyte interphase, and suppressed lithium dendrite growth.
A LiFePO₄/LPELCE/Li solid-state battery showed satisfactory performance.

Conclusions:

The developed composite solid electrolyte shows significant promise for high-safety, high-energy density solid-state lithium batteries.
The strategy of combining ceramic, polymer, and ionic liquid effectively overcomes interfacial challenges.