Li2.0Ni0.67N, a Promising Negative Electrode Material for Li-Ion Batteries with a Soft Structural Response

Thomas Cavoué, Nicolas Emery, Nurzhan Umirov, Stéphane Bach, Pascal Berger, Zhumabay Bakenov, Céline Cénac-Morthe, Jean Pierre Pereira-Ramos

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The layered lithium nitridonickelate Li2.0(1)Ni0.67(2)N has been investigated as a negative electrode in the 0.02-1.25 V vs Li+/Li potential window. Its structural and electrochemical properties are reported. Operando XRD experiments upon three successive cycles clearly demonstrate a single-phase behavior in line with the discharge-charge profiles. The reversible breathing of the hexagonal structure, implying a supercell, is fully explained. The Ni2+/Ni+ redox couple is involved, and the electron transfer is combined with the reversible accommodation of Li+ ions in the cationic vacancies. The structural response is fully reversible and minimal, with a maximum volume variation of 2%. As a consequence, a high capacity of 200 mAh g-1 at C/10 is obtained with an excellent capacity retention, close to 100% even after 100 cycles, which makes Li2.0(1)Ni0.67(2)N a promising negative electrode material for Li-ion batteries.

Original languageEnglish
Pages (from-to)13815-13821
Number of pages7
JournalInorganic Chemistry
Volume56
Issue number22
DOIs
Publication statusPublished - Nov 20 2017
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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