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Digital PCR-based Competitive Index for High-throughput Analysis of Fitness in Salmonella

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Jiafeng Li¹, Tao Zhang¹, Xiaobin Hui¹

¹Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jinan, 250061, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|June 7, 2023

Summary

This summary is machine-generated.

This study developed a safer ionogel electrolyte using a zwitterion-based copolymer, enhancing lithium-ion transport and conductivity for improved battery performance and safety.

Keywords:

Li metal batteries Li+ transport kinetics ionic conductivity ionogel electrolytes zwitterion

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Area of Science:

Materials Science
Electrochemistry
Polymer Chemistry

Background:

Volatile liquid electrolytes in gel polymer electrolytes pose safety risks like overheating and fire.
Ionic liquids offer a safer alternative, but optimizing ion transport remains a challenge.

Purpose of the Study:

To develop a zwitterion-based copolymer matrix for ionogel electrolytes.
To enhance lithium-ion (Li+) transport kinetics and ionic conductivity.
To improve the safety and performance of lithium-ion batteries.

Main Methods:

Copolymerization of trimethylolpropane ethoxylate triacrylate (ETPTA) and 2-methacryloyloxyethylphosphorylcholine (MPC).
Characterization of ionogel electrolytes for Li+ coordination and transport.
Fabrication and testing of Li||LiFePO4 battery cells and pouch cells.

Main Results:

The zwitterion-based ionogel optimized Li+ coordination, decreasing the energy barrier for desolvation.
Achieved a room-temperature ionic conductivity of 4.4 × 10-4 S cm-1.
Formed a LiF-enriched solid electrolyte interphase (SEI) layer, enhancing reduction stability.
Li||LiFePO4 cells showed a high reversible discharge capacity (139 mAh g-1 at 0.5 C) and good cycling stability.
Pouch cells demonstrated excellent safety under abuse testing.

Conclusions:

Zwitterion incorporation in ionogel electrolytes significantly improves Li+ transport and battery performance.
The developed ionogel electrolytes offer enhanced safety due to improved reduction stability and SEI formation.
This approach presents a promising strategy for developing safer and high-performance lithium-ion batteries.