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Title: Characterization of layered lithium nickel manganese oxides synthesized by a novel oxidative coprecipitation method and their electrochemical performance as lithium insertion electrode materials

Abstract

Lithium nickel manganese oxides, LiNi{sub 1{minus}y}Mn{sub y}O{sub 2+{delta}}, (0 {le} y {le} 0.5) were prepared via a new solution technique. The corresponding mixed nickel manganese hydroxide precursors were synthesized in an oxidative coprecipitation method. Subsequent calcination in the presence of LiOH leads to crystalline products with a partially disordered layered-type {alpha}-NaFeO{sub 2} structure. X-ray photoelectron spectroscopic analysis has indicated a strong enrichment of lithium at the surface. The electrochemical performance of these materials as positive electrodes in lithium-ion batteries was evaluated as a function of the calcination temperature and manganese content. A calcination temperature of 700 C leads to the best cycling stability. At this temperature, a sufficiently high degree of crystallinity was achieved, having a strong influence on the cycling stability of these 4 V materials. The specific charge and cycling stability obtained for the solution-prepared pure lithium nickel oxide, LiNiO{sub 2}, was low, but was significantly enhanced by replacing some nickel with manganese. With increasing manganese content, the specific charge increased to about 170 mAh/g for materials with a Ni:Mn ratio of about 1:1. Ex situ magnetic susceptibility measurements proved that during lithium deinsertion, the trivalent manganese is preferentially oxidized, and seems to be the more reactive redoxmore » center in these oxides.« less

Authors:
 [1]; ; ;  [2];  [3]
  1. Paul Scherrer Inst., Villigen (Switzerland). Electrochemistry Section|[Swiss Federal Inst. of Tech., Zurich (Switzerland). Lab. of Inorganic Chemistry
  2. Paul Scherrer Inst., Villigen (Switzerland). Electrochemistry Section
  3. Swiss Federal Inst. of Tech., Zurich (Switzerland). Lab. of Inorganic Chemistry
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
624291
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 145; Journal Issue: 4; Other Information: PBD: Apr 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; LITHIUM OXIDES; NICKEL OXIDES; MANGANESE OXIDES; COPRECIPITATION; CRYSTAL STRUCTURE; ELECTRICAL PROPERTIES; METAL-NONMETAL BATTERIES; CALCINATION; MAGNETIC SUSCEPTIBILITY

Citation Formats

Spahr, M.E., Novak, P., Schnyder, B., Haas, O., and Nesper, R. Characterization of layered lithium nickel manganese oxides synthesized by a novel oxidative coprecipitation method and their electrochemical performance as lithium insertion electrode materials. United States: N. p., 1998. Web. doi:10.1149/1.1838425.
Spahr, M.E., Novak, P., Schnyder, B., Haas, O., & Nesper, R. Characterization of layered lithium nickel manganese oxides synthesized by a novel oxidative coprecipitation method and their electrochemical performance as lithium insertion electrode materials. United States. doi:10.1149/1.1838425.
Spahr, M.E., Novak, P., Schnyder, B., Haas, O., and Nesper, R. Wed . "Characterization of layered lithium nickel manganese oxides synthesized by a novel oxidative coprecipitation method and their electrochemical performance as lithium insertion electrode materials". United States. doi:10.1149/1.1838425.
@article{osti_624291,
title = {Characterization of layered lithium nickel manganese oxides synthesized by a novel oxidative coprecipitation method and their electrochemical performance as lithium insertion electrode materials},
author = {Spahr, M.E. and Novak, P. and Schnyder, B. and Haas, O. and Nesper, R.},
abstractNote = {Lithium nickel manganese oxides, LiNi{sub 1{minus}y}Mn{sub y}O{sub 2+{delta}}, (0 {le} y {le} 0.5) were prepared via a new solution technique. The corresponding mixed nickel manganese hydroxide precursors were synthesized in an oxidative coprecipitation method. Subsequent calcination in the presence of LiOH leads to crystalline products with a partially disordered layered-type {alpha}-NaFeO{sub 2} structure. X-ray photoelectron spectroscopic analysis has indicated a strong enrichment of lithium at the surface. The electrochemical performance of these materials as positive electrodes in lithium-ion batteries was evaluated as a function of the calcination temperature and manganese content. A calcination temperature of 700 C leads to the best cycling stability. At this temperature, a sufficiently high degree of crystallinity was achieved, having a strong influence on the cycling stability of these 4 V materials. The specific charge and cycling stability obtained for the solution-prepared pure lithium nickel oxide, LiNiO{sub 2}, was low, but was significantly enhanced by replacing some nickel with manganese. With increasing manganese content, the specific charge increased to about 170 mAh/g for materials with a Ni:Mn ratio of about 1:1. Ex situ magnetic susceptibility measurements proved that during lithium deinsertion, the trivalent manganese is preferentially oxidized, and seems to be the more reactive redox center in these oxides.},
doi = {10.1149/1.1838425},
journal = {Journal of the Electrochemical Society},
number = 4,
volume = 145,
place = {United States},
year = {1998},
month = {4}
}