Effect of the NO3−/CH3COO− ratio on structure and performance of ultrafine LiMn2O4 by solution combustion synthesis

Zhang, Qingtang; Mei, Juntao; Wang, Xiaomei; Fan, Weiyu; Wang, Fucheng; Lu, Wengjiang; Tang, Fuling

doi:10.1016/j.jallcom.2014.04.043

Cited by 13 publications

(9 citation statements)

References 31 publications

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“…The SCS was also used to prepare cubic LiMn 2 O 4 as a cathode material for lithium ion batteries. − The use of LiMn 2 O 4 offers benefits such as low cost, natural abundance, and environmental friendliness of manganese precursors, and thermal stability of the spinel . However, its practical application has been limited by a relatively low diffusion rate, low specific capacity, and severe capacity fading with cycling in contrast to LiCoO 2 .…”

Section: Solution Combustion-derived Materialsmentioning

confidence: 99%

Solution Combustion Synthesis of Nanoscale Materials

Mukasyan²,

et al. 2016

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Solution combustion is an exciting phenomenon, which involves propagation of self-sustained exothermic reactions along an aqueous or sol-gel media. This process allows for the synthesis of a variety of nanoscale materials, including oxides, metals, alloys, and sulfides. This Review focuses on the analysis of new approaches and results in the field of solution combustion synthesis (SCS) obtained during recent years. Thermodynamics and kinetics of reactive solutions used in different chemical routes are considered, and the role of process parameters is discussed, emphasizing the chemical mechanisms that are responsible for rapid self-sustained combustion reactions. The basic principles for controlling the composition, structure, and nanostructure of SCS products, and routes to regulate the size and morphology of the nanoscale materials are also reviewed. Recently developed systems that lead to the formation of novel materials and unique structures (e.g., thin films and two-dimensional crystals) with unusual properties are outlined. To demonstrate the versatility of the approach, several application categories of SCS produced materials, such as for energy conversion and storage, optical devices, catalysts, and various important nanoceramics (e.g., bio-, electro-, magnetic), are discussed.

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Section: Solution Combustion-derived Materialsmentioning

confidence: 99%

Solution Combustion Synthesis of Nanoscale Materials

Mukasyan²,

et al. 2016

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“…However, the discharge curve plateau of LLO-3N1A is distinctly higher than that of the other three. This means that the difference the charge and discharge plateaus of LLO-3N1A is the smallest among the four samples and the small difference between the charge and discharge plateaus is representative of the good kinetics of active material [2][3]10]. The smallest nanocrystallites and nanoparticles of LLO-3N1A may shorten the lithium diffuse length and thus LLO-3N1A shows good kinetics.…”

Section: Electrochemical Testsmentioning

confidence: 81%

“…The development of high-energy LIB extremely demands cathode materials with high specific capacity to match the anode materials [2,[4][5][6], which possess a high specific capacity larger than 340 mA h g À1 . However, conventional cathode materials such as LiCoO 2 [7], LiNi 1/3 Co 1/3 Mn 1/3 O 2 [8], LiFePO 4 [9] and LiMn 2 O 4 [10] only deliver a specific capacity lower than 180 mA h g À1 . Therefore, lithium-rich layered oxides based on xLi 2 MnO 3 Á(1-x) LiMO 2 (M = Co, Ni, Mn, etc.…”

Section: Introductionmentioning

confidence: 99%

Solution combustion synthesis and enhanced electrochemical performance Li1.2Ni0.2Mn0.6O2 nanoparticles by controlling NO3–/CH3COO– ratio of the precursors

Zhang

Mei

Xie

et al. 2015

Materials Research Bulletin

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“…Then, the manganese source reagent in the precursor solution is adjusted to Mn(NO 3 ) 2 , the mineralizing agent content to 8 mL, and the hydrothermal temperature to 220 °C. Because NO 3 – is more electronegative than CH 3 COO – and its ionization degree is higher in the precursor solution, the growth direction of crystal particles tends to be multidirectional. , Under the condition of increasing solution pH value and hydrothermal temperature, the preferred orientation of nucleation position and growth direction of nanocrystalline grains is intensified, thus promoting the formation of nanosphere morphology composed of regular thin nanocrystalline sheets (Figure c). The average spacing of the (112) plane of the SMO-NSs lattice is 0.260 nm, which is very close to the (130) plane spacing.…”

Section: Results and Discussionmentioning

confidence: 99%

“…When the amount of NaOH was increased to 10 mL at 220 °C, the growth trend of the SMO-NF catalyst was diffused in all directions. The essential reason is that the increase of OH – in the precursor solution of strongly electronegative NO 3 – ions reduces the ions attached to each surface and promotes the growth of nanocrystals in two-dimensional space. , In terms of morphology transformation, the flake crystals in the nanospheres continue to grow, bend, and become thinner, finally reaching the growth equilibrium and forming the flower-like SMO-NF catalyst (Figure d). In the picture, we can clearly observe the existence of “flower skeleton” and “petals”.…”

Section: Results and Discussionmentioning

confidence: 99%

Morphology-Controlled SmMn₂O₅ Nanocatalysts for Improved Acetone Degradation

Zhang

Ding

et al. 2023

ACS Appl. Nano Mater.

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The SmMn 2 O 5 catalyst is considered as an excellent substitute for noble-metal and transition-metal oxide catalysts due to its unique crystal structure. In order to further improve its catalytic activity for acetone degradation, SmMn 2 O 5 nanocatalysts with four morphologies were synthesized by the hydrothermal method by adjusting the type of manganese source reagent, the content of mineralizing agent, and hydrothermal temperature. Among them, the SMO-NF catalyst prepared with Mn(NO 3 ) 2 as the manganese source, 10 mL of NaOH, and a hydrothermal temperature of 220 °C has a special flower morphology and can achieve 100% acetone conversion at 118 °C. Because of its thin and large "petal" morphology providing active sites and oxygen vacancies, the excellent catalytic performance of the SMO-NF catalyst is an important breakthrough in the field of acetone degradation. In addition, the highly stable crystalline phase, abundant surface reactive oxygen species, and excellent reducibility of the SMO-NF catalyst also lay the foundation for its high catalytic activity, water resistance, and stability. The SMO-NS catalyst with a spherical morphology can completely degrade acetone at 136 °C, and its activity is better than that of the SMO-CP catalyst prepared by the coprecipitation method and Pt/TiO 2 catalysts. The relationship between the formation process of SmMn 2 O 5 nanocatalysts with special morphology and its catalytic activity is discussed as well. The successful synthesis of the SMO-NF catalyst also opens up a way for the synthesis of the special morphology of acetone degradation nanocatalysts.

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Effect of the NO3−/CH3COO− ratio on structure and performance of ultrafine LiMn2O4 by solution combustion synthesis

Cited by 13 publications

References 31 publications

Solution Combustion Synthesis of Nanoscale Materials

Solution Combustion Synthesis of Nanoscale Materials

Solution combustion synthesis and enhanced electrochemical performance Li1.2Ni0.2Mn0.6O2 nanoparticles by controlling NO3–/CH3COO– ratio of the precursors

Morphology-Controlled SmMn₂O₅ Nanocatalysts for Improved Acetone Degradation

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Effect of the NO3−/CH3COO− ratio on structure and performance of ultrafine LiMn2O4 by solution combustion synthesis

Cited by 13 publications

References 31 publications

Solution Combustion Synthesis of Nanoscale Materials

Solution Combustion Synthesis of Nanoscale Materials

Solution combustion synthesis and enhanced electrochemical performance Li1.2Ni0.2Mn0.6O2 nanoparticles by controlling NO3–/CH3COO– ratio of the precursors

Morphology-Controlled SmMn2O5 Nanocatalysts for Improved Acetone Degradation

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Morphology-Controlled SmMn₂O₅ Nanocatalysts for Improved Acetone Degradation