Synthesis, characterization, and electrochemistry of cathode material Li[Li0.2Co0.13Ni0.13Mn0.54]O 2 using organic chelating agents for lithium-ion batteries

Taolin Zhao, Shi Chen, Li Li, Xiaofeng Zhang, Renjie Chen, Ilias Belharouak, Feng Wu, Khalil Amine

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82 Citations (Scopus)

Abstract

Oxalic acid, tartaric acid (TA), and succinic acid (SA) are studied as chelating agents for sol-gel synthesis of Li[Li0.2Co 0.13Ni0.13Mn0.54]O2 as a cathode material for lithium-ion batteries. X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy show that the materials are single-phase compounds with good crystallinities and layered α-NaFeO 2 structures. The TA-material has the smallest particles (0.2-0.3 μm), with a smooth surface, and uniform distribution. Electrochemical studies indicate that the TA-material exhibits the highest initial discharge capacity (281.1 mAh g-1 at 0.1 C, 192.8 mAh g-1 at 2.0 C), the highest reversible capacity after 50 cycles (240.5 mAh g-1 at 0.1 C, 167.4 mAh g-1 at 0.5 C), and the best rate performance. The cycling stability of the SA-material is the best, with capacity retentions of 87.4% at 0.1 C and 80.1% at 0.5 C after 50 cycles. Mn4+/3+ reduction peaks appear at the first discharge process and become more evident with increasing cycle number, resulting in a spinel structure, as proved by cyclic voltammetry and differential capacity curves. Electrical impedance spectroscopy confirms that the low charge-transfer resistance of the TA-material is responsible for its superior discharge capacity and rate performance.

Original languageEnglish
Pages (from-to)206-213
Number of pages8
JournalJournal of Power Sources
Volume228
DOIs
Publication statusPublished - 7 Jan 2013

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Keywords

  • Cathode material
  • Lithium battery
  • Oxalic acid
  • Succinic acid
  • Tartaric acid

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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