Effects of ratios of Li2MnO3 and Li(Ni 1/3Mn1/3Co1/3)O2 phases on the properties of composite cathode powders in spray pyrolysis

Mun Yeong Son, Young Jun Hong, Seung Ho Choi, Yun Chan Kang

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

Composite cathode powders of xLi2MnO3-(1 - x)Li(Ni1/3Mn1/3Co1/3)O2 (0 ≤ x ≤ 1) are prepared by spray pyrolysis. The BET surface areas of the composite powders post-treated at 800 C are 5, 12, 16, 12, 10, and 4 m2 g -1 for x = 0, 0.2, 0.4, 0.5, 0.8, and 1, respectively. The initial discharge capacities of the pure Li(Ni1/3Co1/3Mn 1/3)O2 and Li2MnO3 powders at a constant current density of 25 mA g-1 between 2.0 and 4.8 V are 219 and 27 mAh g-1, respectively. The initial discharge capacities of the composite cathode powders are 242, 283, 291, and 234 mAh g-1 for x = 0.2, 0.4, 0.5, and 0.8, respectively. The discharge capacity of the 0.5Li 2MnO3-0.5Li(Ni1/3Mn1/3Co 1/3)O2 cathode powder decreases from 291 to 266 mAh g -1 by the 50th cycle, giving a capacity retention of 92%.

Original languageEnglish
Pages (from-to)110-118
Number of pages9
JournalElectrochimica Acta
Volume103
DOIs
Publication statusPublished - 2013
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2012R1A2A2A02046367 ). This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2012R1A1B3002382 ).

Keywords

  • Cathode material
  • Composite material
  • Lithium rich
  • Spray pyrolysis

ASJC Scopus subject areas

  • General Chemical Engineering
  • Electrochemistry

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