Feasible nonaqueous route to synthesize a high-voltage spinel cathode material for lithium ion batteries

Jin, Yong; Duh, Jenq‐Gong

doi:10.1039/c4ra09334h

Cited by 4 publications

(3 citation statements)

References 46 publications

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“…The XRD peak intensity ratio, I 111 /I 311 , is a suitable indicator to differentiate between the disordered and ordered phases. 23 The I 111 /I 311 values for LMNO−Ar and LMNO−H 2 are 1.9959 and 2.0650, respectively. The I 111 /I 311 values of the model disordered phase (JCPDS: 32-0581) and ordered phase (JCPDS: 80-2184) are 1.67 and 2.61, respectively.…”

Section: Resultsmentioning

confidence: 95%

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Defect-Engineered β-MnO_2−δ Precursors Control the Structure–Property Relationships in High-Voltage Spinel LiMn_1.5Ni_0.5O_4−δ

et al. 2021

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This study examines the role of defects in structure–property relationships in spinel LiMn1.5Ni0.5O4 (LMNO) cathode materials, especially in terms of Mn3+ content, degree of disorder, and impurity phase, without the use of the traditional high-temperature annealing (≥700 °C used for making disordered LMNO). Two different phases of LMNO (i.e., highly P4332-ordered and highly Fd3̅m-disordered) have been prepared from two different β-MnO2−δ precursors obtained from an argon-rich atmosphere (β-MnO2−δ (Ar)) and a hydrogen-rich atmosphere [β-MnO2−δ (H2)]. The LMNO samples and their corresponding β-MnO2−δ precursors are thoroughly characterized using different techniques including high-resolution transmission electron microscopy, field-emission scanning electron microscopy, Raman spectroscopy, powder neutron diffraction, X-ray photoelectron spectroscopy, synchrotron X-ray diffraction, X-ray absorption near-edge spectroscopy, and electrochemistry. LMNO from β-MnO2−δ (H2) exhibits higher defects (oxygen vacancy content) than the one from the β-MnO2−δ (Ar). For the first time, defective β-MnO2−δ has been adopted as precursors for LMNO cathode materials with controlled oxygen vacancy, disordered phase, Mn3+ content, and impurity contents without the need for conventional methods of doping with metal ions, high synthetic temperature, use of organic compounds, postannealing, microwave, or modification of the temperature-cooling profiles. The results show that the oxygen vacancy changes concurrently with the degree of disorder and Mn3+ content, and the best electrochemical performance is only obtained at 850 °C for LMNO-(Ar). The findings in this work present unique opportunities that allow the use of β-MnO2−δ as viable precursors for manipulating the structure–property relationships in LMNO spinel materials for potential development of high-performance high-voltage lithium-ion batteries.

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Section: Resultsmentioning

confidence: 95%

“…It can be inferred that the LMNO–Ar and LMNO–H 2 have spinel structures. The XRD peak intensity ratio, I 111 / I 311 , is a suitable indicator to differentiate between the disordered and ordered phases . The I 111 / I 311 values for LMNO–Ar and LMNO–H 2 are 1.9959 and 2.0650, respectively.…”

Section: Resultsmentioning

confidence: 99%

Defect-Engineered β-MnO_2−δ Precursors Control the Structure–Property Relationships in High-Voltage Spinel LiMn_1.5Ni_0.5O_4−δ

et al. 2021

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“…Jin and Duh [267] synthesized pure LiNi 0.5 Mn 1.5 O 4 with the help of polymer surfactant in a nonaqueous route. At 10 C, it still remained a specific discharge capacity above 100 mAh g −1 .…”

Section: Lithium Vanadium Oxide (Liv 3 O 8 )mentioning

confidence: 99%

High-energy cathode materials for Li-ion batteries: A review of recent developments

Zhang

Xia

et al. 2015

Sci. China Technol. Sci.

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Lithium ion batteries (LIBs) represent one of the most promising solutions for environmentally friendly transportation such as electric vehicles. The demand for high energy density, low cost and environmentally friendly batteries makes high-capacity cathode materials very attractive for future LIBs. Layered LiNi x Co y Mn z O 2 (x+y+z=1), Li-rich oxides and Li-V-O compounds have attracted much attention due to their high capacities in recent years. In this review, we focus on the state-of-the-art research activities related to LiNi x Co y Mn z O 2 , Li-rich oxides and Li-V-O compounds, including their structures, reaction mechanisms during cycling, challenges and strategies that have been studied to improve their electrochemical performances. layered LiNi x Co y Mn z O 2 , Li-rich layered oxide, Li-V-O compound, cathode material, Li-ion battery Citation: Zhang Y D, Li Y, Xia X H, et al. High-energy cathode materials for Li-ion batteries: A review of recent developments. Sci China Tech Sci,

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CoFe2O4@multi-walled carbon nanotubes integrated composite with nanosized architecture as a cathode material for high performance rechargeable lithium-oxygen battery

Huang

Chi

et al. 2017

Journal of Alloys and Compounds

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Feasible nonaqueous route to synthesize a high-voltage spinel cathode material for lithium ion batteries

Abstract: A new non-aqueous solvent system is applied to synthesis the high voltage spinel cathode. After assisting of polymeric surfactants, a highly-crystalline and impurity-free powder is successfully fabricated with a significantly reduced particle size.

Cited by 4 publications

References 46 publications

Defect-Engineered β-MnO_2−δ Precursors Control the Structure–Property Relationships in High-Voltage Spinel LiMn_1.5Ni_0.5O_4−δ

Defect-Engineered β-MnO_2−δ Precursors Control the Structure–Property Relationships in High-Voltage Spinel LiMn_1.5Ni_0.5O_4−δ

High-energy cathode materials for Li-ion batteries: A review of recent developments

CoFe2O4@multi-walled carbon nanotubes integrated composite with nanosized architecture as a cathode material for high performance rechargeable lithium-oxygen battery

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Feasible nonaqueous route to synthesize a high-voltage spinel cathode material for lithium ion batteries

Abstract: A new non-aqueous solvent system is applied to synthesis the high voltage spinel cathode. After assisting of polymeric surfactants, a highly-crystalline and impurity-free powder is successfully fabricated with a significantly reduced particle size.

Cited by 4 publications

References 46 publications

Defect-Engineered β-MnO2−δ Precursors Control the Structure–Property Relationships in High-Voltage Spinel LiMn1.5Ni0.5O4−δ

Defect-Engineered β-MnO2−δ Precursors Control the Structure–Property Relationships in High-Voltage Spinel LiMn1.5Ni0.5O4−δ

High-energy cathode materials for Li-ion batteries: A review of recent developments

CoFe2O4@multi-walled carbon nanotubes integrated composite with nanosized architecture as a cathode material for high performance rechargeable lithium-oxygen battery

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Defect-Engineered β-MnO_2−δ Precursors Control the Structure–Property Relationships in High-Voltage Spinel LiMn_1.5Ni_0.5O_4−δ

Defect-Engineered β-MnO_2−δ Precursors Control the Structure–Property Relationships in High-Voltage Spinel LiMn_1.5Ni_0.5O_4−δ