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[001]-oriented LiMn0.6Fe0.4PO4/C nanorod microspheres contributing high-rate performance to olivine-structured cathode for lithium-ion battery

Zhang, Baichao ; Meng, Wu ; Gong, Yifan ; Hu, Guorong ; Peng, Zhongdong ; Du, Ke ; Makuza, Brian ; Wu, Jiahui ; Xie, Xiaoming ; Cao, Yanbing

Materials today energy, 2022-12, Vol.30, p.101162, Article 101162 [Periódico revisado por pares]

Elsevier Ltd

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  • Título:
    [001]-oriented LiMn0.6Fe0.4PO4/C nanorod microspheres contributing high-rate performance to olivine-structured cathode for lithium-ion battery
  • Autor: Zhang, Baichao ; Meng, Wu ; Gong, Yifan ; Hu, Guorong ; Peng, Zhongdong ; Du, Ke ; Makuza, Brian ; Wu, Jiahui ; Xie, Xiaoming ; Cao, Yanbing
  • Assuntos: Crystal orientation ; High-rate performance ; LiMn0.6Fe0.4PO4 ; Lithium-ion batteries ; Nanorods
  • É parte de: Materials today energy, 2022-12, Vol.30, p.101162, Article 101162
  • Descrição: Recently, cathode materials for Li-ion batteries (LIBs) with high-voltage platforms have become a research hotspot. Olivine-structured LiMnPO4 has the advantage of 4.1 V voltage platform but also has been plagued by poor e-/Li+ conductivity. Here, we report a facile synthetic strategy to fabricate LiMn0.6Fe0.4PO4/C (LMFP) composite. Such composite is composed of [001]-oriented nanorods and assembled into dense microspheres. The [001]-oriented nanorod structure exhibits a shortened Li+ diffusion length resulting from a smaller dimensional size in the [010] direction. Meanwhile, the conductive carbon nanolayer is uniformly coated on the surface of LiMn0.6Fe0.4PO4 nanorods, which greatly improves the e- conductivity of the material. The [001]-oriented structure feature combined with improved e- conductivity contributes to the delivery of extraordinary rate capabilities (141.6 mAh/g at 10C) and remarkable cycling stabilities (97.8% retention rate after 300 cycles at 1C). Such rational-designed nanorod microspheres are good candidates for the next generation of olivine-structured cathode for high-rate, high-energy, and high-safety LIBs. Synopsis: The conformal carbon layer coating design combined with [001]-oriented nanostructure synergistically enhances LMFP performance and breaks through the limitation of poor e-/Li+ conductivity of LMFP. [Display omitted] •An ultrathin carbon layer (∼3 nm) was successfully constructed on the surface of LMFP nanorods.•The prepared [001]-oriented LMFP has a shortened Li+ diffusion length (∼30 nm) in bulk.•The coating design combined with [001]-oriented structure synergistically enhances LMFP performance.•The [001]-oriented LMFP exhibits extraordinary rate capabilities and remarkable cycling durability.•The synthesis process is eco-friendly and provides opportunities for scaling up.
  • Editor: Elsevier Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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