Synthesis, structure, and magnetic properties of [Li(H2O) M(N2H3CO2)3]·0.5H 2O (M = Co,Ni) as single precursors to LiMO2 battery materials

Szu Lui Tey; M. V. Reddy; G. V. Subba Rao; B. V.R. Chowdari; Jiabao Yi; Jun Ding; Jagadese J. Vittal

doi:10.1021/cm0523891

Synthesis, structure, and magnetic properties of [Li(H₂O) M(N₂H₃CO₂)₃]·0.5H ₂O (M = Co,Ni) as single precursors to LiMO₂ battery materials

Szu Lui Tey, M. V. Reddy, G. V. Subba Rao, B. V.R. Chowdari, Jiabao Yi, Jun Ding, Jagadese J. Vittal^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

Abstract

[Li(H₂O)M(N₂H₃CO₂) ₃]·0.5H₂O, M = Ni (1) and Co (2), has been synthesized in moderate yield from the corresponding metal salts and hydrazinecarboxylate anion, N₂H₃CO₂ ^-, prepared by mixing N₂H₄, H₂O and dry ice. Both the compounds crystallized in the chiral space group P2 ₁ and have interesting 2D bilayer network structures in the solid state comprising fused helical coordination polymers with extensive hydrogen bonding. Samples 1 and 2 exhibited paramagnetism, as shown by the variable temperature magnetic measurements. The calculated magnetic moments were 2.82 and 4.39 μ_B for 1 and 2, respectively. These two compounds have been investigated as single precursors for layered materials LiMO₂, M = Ni and Co. Pyrolysis of 1 and 2 yields LiNiO₂ and LiCoO₂ at 700°C in an oxygen atmosphere and at T > 700°C in air, respectively. They were characterized by powder XRD, Rietveld refinement, and SEM. Cathodic properties of LiMO₂ have been evaluated by cyclic voltammetry and galvanostatic charge-discharge cycling up to 20 cycles in the voltage ranges, 2.5-4.3 and 2.5-4.5 V vs Li metal. Results are in tune with those reported in the literature, thereby indicating that 1 and 2 are excellent single-source precursors for obtaining electrochemically active battery materials.

Original language	English
Pages (from-to)	1587-1594
Number of pages	8
Journal	Chemistry of Materials
Volume	18
Issue number	6
DOIs	https://doi.org/10.1021/cm0523891
State	Published - 21 Mar 2006
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/cm0523891

Cite this

@article{26774763682f4054ae2d1a7b5ce501d2,

title = "Synthesis, structure, and magnetic properties of [Li(H2O) M(N2H3CO2)3]·0.5H 2O (M = Co,Ni) as single precursors to LiMO2 battery materials",

abstract = "[Li(H2O)M(N2H3CO2) 3]·0.5H2O, M = Ni (1) and Co (2), has been synthesized in moderate yield from the corresponding metal salts and hydrazinecarboxylate anion, N2H3CO2 -, prepared by mixing N2H4, H2O and dry ice. Both the compounds crystallized in the chiral space group P2 1 and have interesting 2D bilayer network structures in the solid state comprising fused helical coordination polymers with extensive hydrogen bonding. Samples 1 and 2 exhibited paramagnetism, as shown by the variable temperature magnetic measurements. The calculated magnetic moments were 2.82 and 4.39 μB for 1 and 2, respectively. These two compounds have been investigated as single precursors for layered materials LiMO2, M = Ni and Co. Pyrolysis of 1 and 2 yields LiNiO2 and LiCoO2 at 700°C in an oxygen atmosphere and at T > 700°C in air, respectively. They were characterized by powder XRD, Rietveld refinement, and SEM. Cathodic properties of LiMO2 have been evaluated by cyclic voltammetry and galvanostatic charge-discharge cycling up to 20 cycles in the voltage ranges, 2.5-4.3 and 2.5-4.5 V vs Li metal. Results are in tune with those reported in the literature, thereby indicating that 1 and 2 are excellent single-source precursors for obtaining electrochemically active battery materials.",

author = "Tey, \{Szu Lui\} and Reddy, \{M. V.\} and \{Subba Rao\}, \{G. V.\} and Chowdari, \{B. V.R.\} and Jiabao Yi and Jun Ding and Vittal, \{Jagadese J.\}",

year = "2006",

month = mar,

day = "21",

doi = "10.1021/cm0523891",

language = "English",

volume = "18",

pages = "1587--1594",

journal = "Chemistry of Materials",

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TY - JOUR

T1 - Synthesis, structure, and magnetic properties of [Li(H2O) M(N2H3CO2)3]·0.5H 2O (M = Co,Ni) as single precursors to LiMO2 battery materials

AU - Tey, Szu Lui

AU - Reddy, M. V.

AU - Subba Rao, G. V.

AU - Chowdari, B. V.R.

AU - Yi, Jiabao

AU - Ding, Jun

AU - Vittal, Jagadese J.

PY - 2006/3/21

Y1 - 2006/3/21

N2 - [Li(H2O)M(N2H3CO2) 3]·0.5H2O, M = Ni (1) and Co (2), has been synthesized in moderate yield from the corresponding metal salts and hydrazinecarboxylate anion, N2H3CO2 -, prepared by mixing N2H4, H2O and dry ice. Both the compounds crystallized in the chiral space group P2 1 and have interesting 2D bilayer network structures in the solid state comprising fused helical coordination polymers with extensive hydrogen bonding. Samples 1 and 2 exhibited paramagnetism, as shown by the variable temperature magnetic measurements. The calculated magnetic moments were 2.82 and 4.39 μB for 1 and 2, respectively. These two compounds have been investigated as single precursors for layered materials LiMO2, M = Ni and Co. Pyrolysis of 1 and 2 yields LiNiO2 and LiCoO2 at 700°C in an oxygen atmosphere and at T > 700°C in air, respectively. They were characterized by powder XRD, Rietveld refinement, and SEM. Cathodic properties of LiMO2 have been evaluated by cyclic voltammetry and galvanostatic charge-discharge cycling up to 20 cycles in the voltage ranges, 2.5-4.3 and 2.5-4.5 V vs Li metal. Results are in tune with those reported in the literature, thereby indicating that 1 and 2 are excellent single-source precursors for obtaining electrochemically active battery materials.

AB - [Li(H2O)M(N2H3CO2) 3]·0.5H2O, M = Ni (1) and Co (2), has been synthesized in moderate yield from the corresponding metal salts and hydrazinecarboxylate anion, N2H3CO2 -, prepared by mixing N2H4, H2O and dry ice. Both the compounds crystallized in the chiral space group P2 1 and have interesting 2D bilayer network structures in the solid state comprising fused helical coordination polymers with extensive hydrogen bonding. Samples 1 and 2 exhibited paramagnetism, as shown by the variable temperature magnetic measurements. The calculated magnetic moments were 2.82 and 4.39 μB for 1 and 2, respectively. These two compounds have been investigated as single precursors for layered materials LiMO2, M = Ni and Co. Pyrolysis of 1 and 2 yields LiNiO2 and LiCoO2 at 700°C in an oxygen atmosphere and at T > 700°C in air, respectively. They were characterized by powder XRD, Rietveld refinement, and SEM. Cathodic properties of LiMO2 have been evaluated by cyclic voltammetry and galvanostatic charge-discharge cycling up to 20 cycles in the voltage ranges, 2.5-4.3 and 2.5-4.5 V vs Li metal. Results are in tune with those reported in the literature, thereby indicating that 1 and 2 are excellent single-source precursors for obtaining electrochemically active battery materials.

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U2 - 10.1021/cm0523891

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