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Journal articles
Li 2.0 Ni 0.67 N: a promising negative electrode material for Li-ion batteries with a soft structural response
Abstract : The layered lithium nitridonickelate Li2.0(1)Ni0.67(2)N have been investigated as 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 Ni 2+ /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 maximal 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.
Cited literature [8 references]
https://hal-cea.archives-ouvertes.fr/cea-01626781
Contributor : Serge Palacin <>
Submitted on : Tuesday, October 31, 2017 - 12:06:30 PM
Last modification on : Saturday, May 1, 2021 - 3:51:54 AM
Long-term archiving on: : Thursday, February 1, 2018 - 12:32:46 PM
Contributor : Serge Palacin <>
Submitted on : Tuesday, October 31, 2017 - 12:06:30 PM
Last modification on : Saturday, May 1, 2021 - 3:51:54 AM
Long-term archiving on: : Thursday, February 1, 2018 - 12:32:46 PM
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Berger-LiNiN_2017_V0.pdf
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