Pyrolysis of a Three‐Dimensional Mn<sup>II</sup>/Mn<sup>III</sup> Network To Give a Multifunctional Porous Manganese Oxide Material

Nayak, Sanjit; Malik, Sharali; Indris, Sylvio; Reedijk, Jan; Powell, Annie K.

doi:10.1002/chem.200902383

Cited by 34 publications

(24 citation statements)

References 39 publications

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“…Carbon nanomaterials were also incorporated to enhance the electronic conductivity. [8][9][10][11][13][14][15][16][17][18][19][20][21][22][23][24] Graphene, [20] carbon nanotubes, [17,23] and carbon nanofibers [24] hae been used to fabricate manganese oxide-carbon nanocomposite anode materials. However, the high surface area of manganese oxide-carbon nanocomposites resulted in low coulombic efficiency due to the formation of a large unstable solid electrolyte interphase (SEI) during nanoparticles have demonstrated the best electrochemical performance of manganese oxide anode to date.…”

Section: Introductionmentioning

confidence: 99%

Interdispersed Amorphous MnO_x–Carbon Nanocomposites with Superior Electrochemical Performance as Lithium‐Storage Material

Guo

Liu

Wang

et al. 2011

Adv Funct Materials

389

342

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The realization of manganese oxide anode materials for lithium-ion batteries is hindered by inferior cycle stability, rate capability, and high overpotential induced by the agglomeration of manganese metal grains, low conductivity of manganese oxide, and the high stress/strain in the crystalline manganese oxide structure during the repeated lithiation/delithiation process. To overcome these challenges, unique amorphous MnO x -C nanocomposite particles with interdispersed carbon are synthesized using aerosol spray pyrolysis. The carbon filled in the pores of amorphous MnO x blocks the penetration of liquid electrolyte to the inside of MnO x , thus reducing the formation of a solid electrolyte interphase and lowering the irreversible capacity. The high electronic and lithium-ion conductivity of carbon also enhances the rate capability. Moreover, the interdispersed carbon functions as a barrier structure to prevent manganese grain agglomeration. The amorphous structure of MnO x brings additional benefits by reducing the stress/strain of the conversion reaction, thus lowering lithiation/delithiation overpotential. As the result, the amorphous MnO x -C particles demonstrated the best performance as an anode material for lithium-ion batteries to date.

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Section: Introductionmentioning

confidence: 99%

Interdispersed Amorphous MnO_x–Carbon Nanocomposites with Superior Electrochemical Performance as Lithium‐Storage Material

Guo

Liu

Wang

et al. 2011

Adv Funct Materials

389

342

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“…Meanwhile, the solid-state pyrolysis of metal-organic frameworks (MOFs) has emerged as an alternative route to synthesize metal oxides with diverse morphologies. [11][12][13][14][15][16] MOFs are a class of crystalline micro-and mesoporous materials composed of metal ions or metal ion clusters connected to each other by organic ligands. 17,18 Advantages of MOFs over other precursors for solid state synthesis of metal oxides are its porosity and long-range ordering that offer unique opportunity to synthesize unusual metal oxide morphologies while using the porous MOFs as a host matrix for loading with additional components.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Gold/Titania Photocatalyst for CO₂ Reduction Based on Pyrolytic Conversion of the Metal–Organic Framework NH₂-MIL-125(Ti) Loaded with Gold Nanoparticles

Khaletskaya¹,

Pougin²,

Medishetty³

et al. 2015

Chem. Mater.

146

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Titania exhibits unique photo-physical and -chemical properties and can be used for potential applications in the field of photocatalysis. The control of TiO2 in terms of phase, shape, morphology, and especially nano-scale synthesis of TiO2 particles still remains a challenge. Ti-containing metal-organic frameworks (MOFs), such as MIL-125, can be used as sacrificial precursors to obtain TiO2 materials with diverse phase compositions, morphologies, sizes and surface areas. MIL-125 is composed of Ti/O clusters as the secondary building units (SBUs) bridged by 1,4-benzene-dicarboxylate (bdc). In this study, pre-formed and surfactant stabilized gold nanoparticles (GNPs) were deposited onto the surface of amino functionalized NH2-MIL-125 during solvothermal synthesis. Targeted gold/titania nano composites, GNP/TiO2, were fabricated through the pyrolysis of GNP/NH2-MIL-125 nanocrystals. The modification of TiO2 with GNPs significantly increased the photocatalytic activity of the MOF derived TiO2 material for the reduction of CO2 to CH4 as compared to TiO2 reference samples such as P-25 and Aurolite (Au/TiO2). The new materials GNP/TiO2 and TiO2 derived by the MOF precursor route were thoroughly characterized by PXRD, FTIR and RAMAN, TEM and N2 adsorption studies.

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“…[5][6][7][8][9][10][11][12][13][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] However, cobalt-based oxides are not ideal anode materials because of their high cost, toxicity, and high lithium extraction potential (2.2-2.4 V vs. Li + /Li). In comparison, manganese oxides are non-toxic, available in abundance and are low in cost.…”

Section: Introductionmentioning

confidence: 99%

Formation of quasi-mesocrystal ZnMn₂O₄ twin microspheres via an oriented attachment for lithium-ion batteries

Liu

Bai

et al. 2014

J. Mater. Chem. A

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At present, transition metal oxides (TMOs) have generally been fabricated via annealing carbonates preobtained by a precipitation/solvothermal route. We noted that researchers mainly focused on how to get the expected TMOs through calcination. However, study about the formation process of the corresponding precursors is rarely investigated. Instead, it is of much importance for the development of materials chemistry. Herein, as an example, for the first time, we devise a facile polyol-based method to synthesize the quasi-mesocrystal ZnMn 2 O 4 porous twin-microspheres. Formation chemistry and electrochemical properties of the twin spheres have been investigated in detail. A distinctive oriented attachment accompanied by Ostwald ripening is proposed to understand the formation of the 3D carbonate twin microspheres, providing a new research opportunity for investigating the formation of novel micro/nanostructures. Benefitting from the many unique structural advantages, including quasimesocrystal architecture, 3D hierarchical porous microstructure, and lithium alloying reaction, the asprepared ZnMn 2 O 4 twin spheres represent remarkable lithium storage properties when evaluated as anode materials for lithium-ion batteries (LIBs), with high capacity, long cycle life and remarkable rate capability. The 3D porous hierarchical structures demonstrate great potential as anode materials for high-performance LIBs.

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Pyrolysis of a Three‐Dimensional Mn^II/Mn^III Network To Give a Multifunctional Porous Manganese Oxide Material

Cited by 34 publications

References 39 publications

Interdispersed Amorphous MnO_x–Carbon Nanocomposites with Superior Electrochemical Performance as Lithium‐Storage Material

Interdispersed Amorphous MnO_x–Carbon Nanocomposites with Superior Electrochemical Performance as Lithium‐Storage Material

Fabrication of Gold/Titania Photocatalyst for CO₂ Reduction Based on Pyrolytic Conversion of the Metal–Organic Framework NH₂-MIL-125(Ti) Loaded with Gold Nanoparticles

Formation of quasi-mesocrystal ZnMn₂O₄ twin microspheres via an oriented attachment for lithium-ion batteries

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Pyrolysis of a Three‐Dimensional MnII/MnIII Network To Give a Multifunctional Porous Manganese Oxide Material

Cited by 34 publications

References 39 publications

Interdispersed Amorphous MnOx–Carbon Nanocomposites with Superior Electrochemical Performance as Lithium‐Storage Material

Interdispersed Amorphous MnOx–Carbon Nanocomposites with Superior Electrochemical Performance as Lithium‐Storage Material

Fabrication of Gold/Titania Photocatalyst for CO2 Reduction Based on Pyrolytic Conversion of the Metal–Organic Framework NH2-MIL-125(Ti) Loaded with Gold Nanoparticles

Formation of quasi-mesocrystal ZnMn2O4 twin microspheres via an oriented attachment for lithium-ion batteries

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Pyrolysis of a Three‐Dimensional Mn^II/Mn^III Network To Give a Multifunctional Porous Manganese Oxide Material

Interdispersed Amorphous MnO_x–Carbon Nanocomposites with Superior Electrochemical Performance as Lithium‐Storage Material

Interdispersed Amorphous MnO_x–Carbon Nanocomposites with Superior Electrochemical Performance as Lithium‐Storage Material

Fabrication of Gold/Titania Photocatalyst for CO₂ Reduction Based on Pyrolytic Conversion of the Metal–Organic Framework NH₂-MIL-125(Ti) Loaded with Gold Nanoparticles

Formation of quasi-mesocrystal ZnMn₂O₄ twin microspheres via an oriented attachment for lithium-ion batteries