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Title: High capacity Li/Ni rich Ni-Ti-Mo oxide cathode for Li-ion batteries

Abstract

With the rising cost and insufficient supply of cobalt, the thrust for cobalt-free cathode materials with the high specific capacity to build Li-ion batteries has increased significantly. Using nickel as the prime electrochemical active species, we have synthesized a new-class of materials with the combination of ordered and disordered phases. To obtain high capacity and electrical charge neutrality, stoichiometry of cations designed in a way that it forms Li/Ni rich Ni-Ti-Mo oxide materials. In addition to conventional capacity from redox activity of transition metals, partially reversible oxygen redox reaction also contributes to electrochemical activity and thus results in unusual high capacity. The resultant cathode materials of LiNi0.5Ti0.5O2-(Li4MoO5)0.8 and LiNiO2 mixture phases reach the specific capacity of 240 mAh/g. Detailed soft X-ray absorption spectroscopy and electron microscopy are used to reveal the crystal phases in this system and trace changes in the Ni2+/Ni4+ redox couple during charge-discharge processes. Finally, such comprehensive analysis of ordered-disordered oxides suggesting potentiality to develop high-capacity cobalt-free cathodes.

Authors:
 [1];  [1];  [1];  [2];  [1];  [3];  [3];  [3];  [3];  [1]
  1. Rice Univ., Houston, TX (United States)
  2. Rice Univ., Houston, TX (United States); Univ. of Houston, TX (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1608945
Alternate Identifier(s):
OSTI ID: 1594221
Grant/Contract Number:  
AC02-76SF00515; SC00014607
Resource Type:
Accepted Manuscript
Journal Name:
Solid State Ionics
Additional Journal Information:
Journal Volume: 345; Journal Issue: C; Journal ID: ISSN 0167-2738
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Li-ion battery; Li excess cathodes; order-disorder materials; oxygen redox activity; x-ray absorption spectroscopy

Citation Formats

Xu, Jianan, Babu, Ganguli, Kato, Keiko, Robles Hernández, Francisco C., Puthirath, Anand B., Britz, Alexander, Nordlund, Dennis, Sainio, Sami, Bergmann, Uwe, and Ajayan, Pulickel M.. High capacity Li/Ni rich Ni-Ti-Mo oxide cathode for Li-ion batteries. United States: N. p., 2019. Web. https://doi.org/10.1016/j.ssi.2019.115172.
Xu, Jianan, Babu, Ganguli, Kato, Keiko, Robles Hernández, Francisco C., Puthirath, Anand B., Britz, Alexander, Nordlund, Dennis, Sainio, Sami, Bergmann, Uwe, & Ajayan, Pulickel M.. High capacity Li/Ni rich Ni-Ti-Mo oxide cathode for Li-ion batteries. United States. https://doi.org/10.1016/j.ssi.2019.115172
Xu, Jianan, Babu, Ganguli, Kato, Keiko, Robles Hernández, Francisco C., Puthirath, Anand B., Britz, Alexander, Nordlund, Dennis, Sainio, Sami, Bergmann, Uwe, and Ajayan, Pulickel M.. Fri . "High capacity Li/Ni rich Ni-Ti-Mo oxide cathode for Li-ion batteries". United States. https://doi.org/10.1016/j.ssi.2019.115172. https://www.osti.gov/servlets/purl/1608945.
@article{osti_1608945,
title = {High capacity Li/Ni rich Ni-Ti-Mo oxide cathode for Li-ion batteries},
author = {Xu, Jianan and Babu, Ganguli and Kato, Keiko and Robles Hernández, Francisco C. and Puthirath, Anand B. and Britz, Alexander and Nordlund, Dennis and Sainio, Sami and Bergmann, Uwe and Ajayan, Pulickel M.},
abstractNote = {With the rising cost and insufficient supply of cobalt, the thrust for cobalt-free cathode materials with the high specific capacity to build Li-ion batteries has increased significantly. Using nickel as the prime electrochemical active species, we have synthesized a new-class of materials with the combination of ordered and disordered phases. To obtain high capacity and electrical charge neutrality, stoichiometry of cations designed in a way that it forms Li/Ni rich Ni-Ti-Mo oxide materials. In addition to conventional capacity from redox activity of transition metals, partially reversible oxygen redox reaction also contributes to electrochemical activity and thus results in unusual high capacity. The resultant cathode materials of LiNi0.5Ti0.5O2-(Li4MoO5)0.8 and LiNiO2 mixture phases reach the specific capacity of 240 mAh/g. Detailed soft X-ray absorption spectroscopy and electron microscopy are used to reveal the crystal phases in this system and trace changes in the Ni2+/Ni4+ redox couple during charge-discharge processes. Finally, such comprehensive analysis of ordered-disordered oxides suggesting potentiality to develop high-capacity cobalt-free cathodes.},
doi = {10.1016/j.ssi.2019.115172},
journal = {Solid State Ionics},
number = C,
volume = 345,
place = {United States},
year = {2019},
month = {12}
}