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Next-generation Sequencing03:00

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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.
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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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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测序聚合物,使固态电池成为可能.

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
概括
此摘要是机器生成的。

研究人员为电池开发了先进的聚合物电解质. 精确的聚合物设计显著提高了离子导电性,使更安全,高性能全固态电池成为可能.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学
  • 聚合物化学 聚合物化学

背景情况:

  • 固体聚合物电解质对于先进的电池至关重要,但在室温下具有较低的离子导电性,阻碍了实际应用.
  • 现有的聚合物电解质不能与液体或陶电解质的性能相匹配,在电池开发中造成瓶.

研究的目的:

  • 设计具有显著增强的离子导电性的固体聚合物电解质,以提高电池性能.
  • 通过分子设计和精确控制聚合物序列来克服当前聚合物电解质的限制.

主要方法:

  • 设计交替的聚合物序列与精确定位的重复单元.
  • 研究聚合物序列对离子 (Li+) 分布和溶解的影响.
  • 分析序列辅助的地点到地点离子迁移机制.
  • 使用开发的电解质制造和测试全固态电池.

主要成果:

  • 通过精确的分子工程,通过精确的分子工程,实现了Li+导电率的三级增加.
  • 证明了同质化的Li+分布和非聚合的Li+离子溶解.
  • 促进了序列辅助的位点到位点离子迁移,提高了导电性.
  • 在全固态电池中启用可逆和树缓解循环,从环境温度到升温.

结论:

  • 在交替的聚合物序列中重复单元的精确定位是开发高度离子导电的固体聚合物电解质的强大策略.
  • 这种分子工程方法克服了传统聚合物电解质的低离子导电性限制.
  • 开发的材料对下一代能源设备,特别是先进的电池充满希望.