Hollow Porous Hierarchical-Structured 0.5Li2MnO3·0.5LiMn0.4Co0.3Ni0.3O2 as a High-Performance Cathode Material for Lithium-Ion Batteries

Fang Fu; Jiayu Tang; Yuze Yao; Minhua Shao

doi:10.1021/acsami.6b09118

Hollow Porous Hierarchical-Structured 0.5Li₂MnO₃·0.5LiMn_0.4Co_0.3Ni_0.3O₂ as a High-Performance Cathode Material for Lithium-Ion Batteries

ACS Appl Mater Interfaces. 2016 Oct 5;8(39):25654-25659. doi: 10.1021/acsami.6b09118. Epub 2016 Sep 26.

Authors

Fang Fu¹, Jiayu Tang¹, Yuze Yao¹, Minhua Shao¹

Affiliation

¹ Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong.

PMID: 27662239
DOI: 10.1021/acsami.6b09118

Abstract

We report a novel hollow porous hierarchical-architectured 0.5Li₂MnO₃·0.5LiMn_0.4Co_0.3Ni_0.3O₂ (LLO) for lithium-ion batteries (LIBs). The obtained lithium-rich layered oxides possess a large inner cavity, a permeable porous shell, and excellent structural robustness. In LIBs, such unique features are favorable for fast Li⁺ transportation and can provide sufficient contact between active materials and electrolytes, accommodate more Li⁺, and improve the kinetics of the electrochemical reaction. The as-prepared LLO displays an extremely high initial discharge capacity (296.5 mAh g^-1 at 0.2 C), high rate capability (162.6 mAh g^-1 at 10 C), and excellent cycling stability (237.6 mAh g^-1 after 100 cycles at 0.5 C and 153.8 mAh g^-1 after 200 cycles at 10 C). These values are superior to most literature data.

Keywords: cathode; hierarchical architecture; hollow porous structure; lithium-ion batteries; lithium-rich layered oxides; stability.