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Related Concept Videos

Next-generation Sequencing03:00

Next-generation Sequencing

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The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
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Anionic Chain-Growth Polymerization: Mechanism01:04

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The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
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The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
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Related Experiment Video

Updated: Jul 13, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Sequencing polymers to enable solid-state lithium batteries.

Shantao Han1, Peng Wen1, Huaijiao Wang1

  • 1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, China.

Nature Materials
|October 16, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed advanced polymer electrolytes for lithium batteries. Precise polymer design significantly boosts ion conductivity, enabling safer, high-performance all-solid-state batteries.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Solid polymer electrolytes are crucial for advanced lithium batteries but suffer from low ionic conductivity at room temperature, hindering practical applications.
  • Existing polymer electrolytes do not match the performance of liquid or ceramic electrolytes, creating a bottleneck in battery development.

Purpose of the Study:

  • To engineer solid polymer electrolytes with significantly enhanced ionic conductivity for improved lithium battery performance.
  • To overcome the limitations of current polymer electrolytes by molecular design and precise control of polymer sequences.

Main Methods:

  • Designing alternating polymer sequences with precisely positioned repeating units.
  • Investigating the effects of polymer sequence on lithium-ion (Li+) distribution and solvation.
  • Analyzing sequence-assisted site-to-site ion migration mechanisms.
  • Fabricating and testing all-solid-state batteries using the developed electrolytes.

Main Results:

  • Achieved a three-orders-of-magnitude increase in Li+ conductivity through precise molecular engineering.
  • Demonstrated homogenized Li+ distribution and non-aggregated Li+-anion solvation.
  • Facilitated sequence-assisted site-to-site ion migration, enhancing conductivity.
  • Enabled reversible and dendrite-mitigated cycling in all-solid-state batteries from ambient to elevated temperatures.

Conclusions:

  • Precise positioning of repeating units in alternating polymer sequences is a powerful strategy for developing highly ion-conductive solid polymer electrolytes.
  • This molecular engineering approach overcomes the low ionic conductivity limitation of traditional polymer electrolytes.
  • The developed materials are promising for next-generation energy devices, particularly advanced lithium batteries.