Structural and electrochemical investigations on the LiNi0.5−xMn1.5−yMx+yO4 (M=Cr, Al, Zr) compound for 5V cathode material

Oh, Si Hyoung; Chung, Kyung Yoon; Jeon, Sang Hoon; Kim, Chang Sam; Cho, Won Il; Cho, Byung Won

doi:10.1016/j.jallcom.2008.01.097

Cited by 98 publications

(41 citation statements)

References 26 publications

(57 reference statements)

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“…According to previous reports [31,32], spinel LiNi0.5Mn1.5O4 has two different space groups: the Fd-3m (F-type) and the P4332 (P-type) space group. To distinguish more clearly the P4332 (P-type) from the Fd-3m (F-type), Raman spectra were used.…”

Section: Resultsmentioning

confidence: 90%

“…Small peaks characteristic of LiNi0.5Mn1.5O4 ordered in the space group P4332 were detected between 200 and 260 cm −1 in the samples. According to Oh et al [31,33,34], in the Raman spectrum of LiNi0.5Mn1.5O4 the strong band around 630 cm −1 is assigned to the symmetric Mn-O stretching mode of octahedral MnO6 (A1g), and both peaks around 400 and 490 cm −1 are associated with the Ni 2+ -O stretching mode. The peak near 580-630 cm −1 is considered as T2g (3) of the spinel compound.…”

Section: Resultsmentioning

confidence: 97%

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Synthesis and electrochemical performance of Sn-doped LiNi0.5Mn1.5O4 cathode material for high-voltage lithium-ion batteries

Hao

et al. 2017

Sci. China Mater.

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LiNi0.5Mn1.5−xSnxO4 (0 ≤ x ≤ 0.1) cathode materials with uniform and fine particle sizes were successfully synthesized by a two-step calcination of solid-state reaction method. As the cathode materials for lithium ion batteries, the LiNi0.5Mn1.48Sn0.02O4 shows the highest specific capacity and cycle stability. In the potential range of 3.5-4.9 V at room temperature, LiNi0.5Mn1.48Sn0.02O4 composite material shows a discharge capacity of more than 117 mA h g −1 at 0.1 C, while the corresponding discharge capacity of undoped LiNi0.5Mn1.5O4 is only 101 mA h g −1 . Moreover, in cycle performance, all the LiNi0.5Mn1.5−xSnxO4 (0 ≤ x ≤ 0.1) samples show better capacity retention than the undoped LiNi0.5Mn1.5O4 at 1 C rate after 100 cycles. Especially, for the LiNi0.5Mn1.5O4, the discharge capacity after 100 cycles is 90 mA h g −1 , while the corresponding discharge capacities of the undoped LiNi0.5Mn1.5O4 is only 56.1 mA h g −1 . The significantly enhanced DLi + and the enlarged electronic conductivity make the Sn-doped spinel LiNi0.5Mn1.5O4 material present even more excellent electrochemical performances. These results reveal that Sn-doping is an effective way to improve electrochemical performances of LiNi0.5Mn1.5O4.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 97%

Synthesis and electrochemical performance of Sn-doped LiNi0.5Mn1.5O4 cathode material for high-voltage lithium-ion batteries

Hao

et al. 2017

Sci. China Mater.

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“…These vibrational modes are Raman-active. The peaks 519 and 644 cm −1 were due to the symmetric Mn-O stretching mode of MnO 6 octahedra [19]. The lower region two weak modes, i.e., 213 and 262 cm −1 are of the vibrations of the LiO 6 octahedrons [20].…”

Section: Resultsmentioning

confidence: 96%

Structural and electrical studies of LiMnVO4 cathode material for rechargeable lithium batteries

Prakash

Masuda

Sanjeeviraja

2011

Ionics

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The lithium manganese vanadate (LiMnVO 4 ) cathode material was synthesized by using sol-gel method. The thermal behavior of the material has been examined by thermogravimetric and differential thermal analysis. The structure of LiMnVO 4 compound was studied by the Rietveld refined X-ray diffraction technique. Raman spectra showed that the local environment including VO 4 tetrahedra and LiO 6 octahedra as vibrational local units. X-ray photoelectron spectroscopy studies of synthesized LiMnVO 4 powder indicate that the oxidation states of manganese and vanadate are +2 and +5, respectively. The ionic conductivity of the sample is found to be 2.7×10 −5 Scm −1 at 300°C. The temperature dependent conductivity was conformed from the Arrhenius relation and the activation energy is found to be 0.3 eV. Dielectric spectra showed the decrease in dielectric constant with increase in frequency. Dielectric loss spectra reveal that dc conduction contribution predominates in the compound.

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“…Oh et al [45] reported the structure of LiNi 0.5−x Mn 1.5−y M x+y O 4 (M = Cr, Al, Zr) compound, but the charge-discharge performance was not reported. Al-and Zr-doped materials was ordered spinel, but Cr-doped material was normal spinel.…”

Section: Doping By Co 3+ Ionsmentioning

confidence: 99%

“…Al-and Zr-doped materials was ordered spinel, but Cr-doped material was normal spinel. Cr-doped material has the higher electronic conductivity and structural stability with less Jahn-Teller distortion may result in the excellent electrochemical property of spinel [45].…”

Section: Doping By Co 3+ Ionsmentioning

confidence: 99%

Recent developments in the doping of LiNi0.5Mn1.5O4 cathode material for 5 V lithium-ion batteries

Xie

et al. 2011

Ionics

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LiMn 2 O 4 has been considered a promising cathode material for lithium-ion batteries in electric vehicles. However, there are still a number of problems of severe capacity fading before any materials modifications. Among all doped LiMn 2 O 4 , spinel LiNi 0.5 Mn 1.5 O 4 material is seen as a potential cathode material for use in electric vehicles and energy storage systems in the future because of its high working potential (4.7 V), high energy density (the energy density of LiNi 0.5 Mn 1.5 O 4 is 20% higher than that of LiCoO 2 ), acceptable stability, and good cycling performance. In the presented paper, the structure and electrochemical performance of doped LiNi 0.5 Mn 1.5 O 4 are reviewed. The rate capability, rate performance and cyclic life of various doped LiNi 0.5 Mn 1.5 O 4 materials are described. This review also focuses on the present status of doped LiNi 0.5 Mn 1.5 O 4 , then on its near future developments.

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Structural and electrochemical investigations on the LiNi0.5−xMn1.5−yMx+yO4 (M=Cr, Al, Zr) compound for 5V cathode material

Cited by 98 publications

References 26 publications

Synthesis and electrochemical performance of Sn-doped LiNi0.5Mn1.5O4 cathode material for high-voltage lithium-ion batteries

Synthesis and electrochemical performance of Sn-doped LiNi0.5Mn1.5O4 cathode material for high-voltage lithium-ion batteries

Structural and electrical studies of LiMnVO4 cathode material for rechargeable lithium batteries

Recent developments in the doping of LiNi0.5Mn1.5O4 cathode material for 5 V lithium-ion batteries

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