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Chemically anchored two-dimensional-SiOx/zero-dimensional-MoO2 nanocomposites for high-capacity lithium storage materials

机译:用于高容量锂储存材料的化学锚定的二维SiOx /零维MOO2纳米复合材料

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Silicon oxides are promising alternatives for graphite anodes in lithium-ion batteries. SiO _( x ) nanosheets exhibit favorable anodic performances, including outstanding capacity retention and dimensional stability, due to their unique two-dimensional (2D) microstructures, but suffer from low specific capacity and poor initial coulombic efficiency. Here we demonstrate that chemically anchoring of molybdenum dioxide (MoO _(2) ) nanoparticles on the surface of 2D-SiO _( x ) nanosheets via a Mo–O–Si bond boosts both the reversible capacity and initial coloumbic efficiency without sacrificing the useful properties of 2D-SiO _( x ) nanosheets. The enhancements can be attributed to the introduction of a zero-dimensional MoO _(2) nano-object, which offers abnormal storage sites for lithium. The proposed nano-architecturing shows how we can maximize the advantages of 2D nanomaterials for energy storage applications.
机译:硅氧化物是锂离子电池中石墨阳极的有前途的替代方案。 SIO _(x)纳米片表现出良好的阳极性能,包括出色的容量保留和尺寸稳定性,因为它们独特的二维(2D)微观结构,但遭受低特定容量和较差的初始库仑效率。在这里,我们证明了通过Mo-O-Si键的2D-SiO _(x)纳米片表面上的二氧化钼(Moo _(2))纳米颗粒的化学锚固促进了可逆容量和初始Coloumbic效率,而不会牺牲有用2D-SIO _(x)纳米表的属性。增强功能可归因于引入零维MOO _(2)纳米对象,其为锂提供异常的存储位点。所提出的纳米架构示出了我们如何最大限度地提高2D纳米材料的能量存储应用的优点。

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