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相关概念视频

Network Covalent Solids02:18

Network Covalent Solids

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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
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Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material
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双功能多1,3-二氧化) - 石墨C3N4复合材料中间层使固体电池中的稳定兼容的阳极接口成为可能.

Wenqiang Tao1, Ru Li2, Zhijie Bi1

  • 1College of Physics, Qingdao University, Qingdao 266071, China.

Journal of colloid and interface science
|January 25, 2025
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概括

这项研究引入了一种新型的聚1,3-二氧化) - 石墨碳化物 (PDOL-CN) 复合材料中间层,以提高金属电池中基于聚烯 (PAN) 的固体电解质的稳定性. PDOL-CN中间层改善了接口接触,并抑制了副作用,使电池循环稳定.

关键词:
图形的C(3) N(4) 是一个图形.接口问题问题.基于 PAN 的电解质.固体电池是一种固体电池.

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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
  • 聚合物科学 聚合物科学

背景情况:

  • 基于聚烯 (PAN) 的复合固体电解质 (CSEs) 是由于高电压稳定性而对固体电池 (SLB) 有前景.
  • 然而,基于PAN的CSE对金属阳极的稳定性不佳,阻碍了实际应用.

研究的目的:

  • 为基于PAN的CSE的阳极接口开发一种稳定且导电性的复合材料中间层.
  • 为了提高电解质和金属阳极之间的兼容性和电化学稳定性.

主要方法:

  • 在阳极接口上现场引入一个聚1,3-二氧化 (PDOL) -石墨碳化物 (g-C3N4,CN) 复合材料中间层.
  • 介层的离子导电性,电化学稳定性和对沉积的影响.
  • 测试Li对称电池和LiNi0.6Co0.2Mn0.2O2 (NCM622) 液晶电池的测试.

主要成果:

  • 该PDOL-CN介层呈现出高离子导电性 (2.96 × 10−4 S cm−1) 和离子转移数 (0.69).
  • 它有效地抑制了PAN和Li金属之间的副作用反应,使Li对称细胞能够稳定循环400小时.
  • 介层促进了Li3N丰富的固体电解质接口 (SEI) 的形成,具有快速的Li+转移,确保了均的Li沉积.

结论:

  • PDOL-CN复合物中间层显著提高了基于PAN的CSE中SLB的界面兼容性和化学稳定性.
  • 开发出来的中间层有助于NCM622水电池的稳定循环,在270个循环后达到88.2%的容量保留.