Self-assembled Fe3O4 nanoparticle-doped TiO2 nanorod superparticles with highly enhanced lithium storage properties†,Sustainable Energy & Fuels

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Self-assembled Fe3O4 nanoparticle-doped TiO2 nanorod superparticles with highly enhanced lithium storage properties†
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2017-12-20 00:00:00 , DOI: 10.1039/c7se00460e
Bin Xue _{1,

2,

3,

4,

5} , Tongtao Li _{1,

2,

3,

4,

5} , Biwei Wang _{1,

2,

3,

4,

5} , Li Ji _{1,

2,

3,

4,

5} , Dong Yang _{4,

5,

6,

7} , Angang Dong _{1,

2,

3,

4,

5}

Affiliation

Rational design of nanostructured anode materials is of importance for promoting the performance of lithium ion batteries (LIBs). Here the Fe₃O₄ nanoparticles (NPs) were controllably inserted into the matrix of TiO₂ nanorods (NRs) to obtain doped-superparticles (SPs) by a facile colloidal self-assembly route and subsequent calcination. To justify the effects of the doping, the lithium storage performances of the doped-SPs were evaluated as anode materials for LIBs. The results indicated that even a slight doping of Fe₃O₄ NPs can effectively enhance the properties of the anode materials compared with raw TiO₂ NR SPs. Additionally, the Fe₃O₄/(TiO₂)₇₀ SPs showed an optimal performance in term of specific capacity, rate capacity, and cycling stability, whose reversible capacity maintained around 550 mA h g⁻¹ at a current density of 1000 mA g⁻¹ after 400 cycles. The highly enhanced lithium storage of the Fe₃O₄ NP doped-TiO₂ NR SPs can substantially be attributed to the synergism of the doped-superstructure, in which the individual merits of the Fe₃O₄ NPs and TiO₂ NRs are fully played out. This work not only demonstrates the significant effects of Fe₃O₄ NP doping for TiO₂ NR SP anode materials in LIBs, but also opens an avenue for the self-assembly synthesis of doped-SPs with extended applications.

中文翻译：

自组装的Fe ₃ O ₄纳米粒子掺杂的TiO ₂纳米棒超粒子，具有更高的锂存储性能†

合理设计纳米结构阳极材料对于提高锂离子电池（LIB）的性能至关重要。在这里，将Fe ₃ O ₄纳米颗粒（NPs）可控地插入到TiO ₂纳米棒（NRs）的基质中，通过便捷的胶体自组装途径和随后的煅烧获得掺杂超颗粒（SPs）。为了证明掺杂的效果，将掺杂的SP的锂存储性能作为LIB的负极材料进行了评估。结果表明，与未加工的TiO ₂ NR SPs相比，即使少量的Fe ₃ O ₄ NPs掺杂也可以有效地增强负极材料的性能。另外，Fe ₃ O ₄/（TiO ₂）₇₀ SPs在比容量，倍率容量和循环稳定性方面表现出最佳性能，在400次循环后，其可逆容量在1000 mA g ^-1的电流密度下可维持在550 mA hg ^-1左右。Fe ₃ O ₄ NP掺杂的TiO ₂ NR SPs的锂储存高度增强，这在很大程度上归因于掺杂上层结构的协同作用，其中Fe ₃ O ₄ NPs和TiO ₂ NRs的各自优点得到充分发挥。出去。这项工作不仅证明了Fe ₃ O ₄的显著作用。在LIB中对TiO ₂ NR SP阳极材料进行NP掺杂，但也为扩展应用的掺杂SP的自组装合成开辟了一条途径。

更新日期：2017-12-20

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