Modifying High-Voltage Olivine-Type LiMnPO4 Cathode via Mg Substitution in High-Orientation Crystal

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

2 Scopus Citations
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Author(s)

  • Liguang Wang
  • Han Zhang
  • Jiajun Wang
  • Yang Ren
  • Xiaoyi Zhang
  • Geping Yin
  • Jun Wang
  • Pengjian Zuo

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)5928-5935
Journal / PublicationACS Applied Energy Materials
Volume1
Issue number11
Early online date1 Oct 2018
Publication statusPublished - 26 Nov 2018

Abstract

The LiMnPO4 material with Mg2+ ion substitution in transition metal site is successfully obtained by a facile solvothermal method combining with the subsequent spray drying and pyrolysis. The TEM image shows the controlled crystalline orientation of the primary Mg-doped LiMnPO4 particle, and the three-dimensional (3D) hierarchical micronano structure and the electronic structure of the Mg-doped material are investigated by the reconstructed nanotomography and X-ray absorption spectroscopy, respectively. The uniformity of Mg2+ ions substitution at the secondary particle level is confirmed by the transmission X-ray microscopy combined with X-ray absorption near edge structure. The prepared material exhibits an excellent electrochemical performance with the capacity of 156 mAh/g at the rate of 0.1 C, and good capacity retention of 100% after 400 cycles at the rate of 1 C. The in operando synchrotron X-ray diffraction data indicate that the performance improvement of the Mg-doped materials is attributed to the changed electrochemical reaction mechanism from the typical two-phase reaction for pristine LiMnPO4 material to the two-phase reaction combined with the single-phase (solid-solution) reaction process. These findings provide a new approach and understanding on developing high-energy cathode materials for lithium-ion batteries.

Research Area(s)

  • high-voltage cathode, olivine-type structure, Mg substitution, high orientation, lithium-ion battery, ION BATTERIES, TRANSFORMATION, MESOCRYSTAL, STABILITY, CAPACITY, FE

Citation Format(s)

Modifying High-Voltage Olivine-Type LiMnPO4 Cathode via Mg Substitution in High-Orientation Crystal. / Wang, Liguang; Zhang, Han; Liu, Qi; Wang, Jiajun; Ren, Yang; Zhang, Xiaoyi; Yin, Geping; Wang, Jun; Zuo, Pengjian.

In: ACS Applied Energy Materials, Vol. 1, No. 11, 26.11.2018, p. 5928-5935.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review