Limits...
Three-Dimensional (3D) Bicontinuous Hierarchically Porous Mn2O3 Single Crystals for High Performance Lithium-Ion Batteries.

Huang SZ, Jin J, Cai Y, Li Y, Deng Z, Zeng JY, Liu J, Wang C, Hasan T, Su BL - Sci Rep (2015)

Bottom Line: Our synthesized BHP-Mn2O3-SCs with a size of ~700 nm display the best electrochemical performance, with a large reversible capacity (845 mA h g(-1) at 100 mA g(-1) after 50 cycles), high coulombic efficiency (>95%), excellent cycling stability and superior rate capability (410 mA h g(-1) at 1 Ag(-1)).These values are among the highest reported for Mn2O3-based bulk solids and nanostructures.Also, electrochemical impedance spectroscopy study demonstrates that the BHP-Mn2O3-SCs are suitable for charge transfer at the electrode/electrolyte interface.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070, Wuhan, Hubei, China.

ABSTRACT
Bicontinuous hierarchically porous Mn2O3 single crystals (BHP-Mn2O3-SCs) with uniform parallelepiped geometry and tunable sizes have been synthesized and used as anode materials for lithium-ion batteries (LIBs). The monodispersed BHP-Mn2O3-SCs exhibit high specific surface area and three dimensional interconnected bimodal mesoporosity throughout the entire crystal. Such hierarchical interpenetrating porous framework can not only provide a large number of active sites for Li ion insertion, but also good conductivity and short diffusion length for Li ions, leading to a high lithium storage capacity and enhanced rate capability. Furthermore, owing to their specific porosity, these BHP-Mn2O3-SCs as anode materials can accommodate the volume expansion/contraction that occurs with lithium insertion/extraction during discharge/charge processes, resulting in their good cycling performance. Our synthesized BHP-Mn2O3-SCs with a size of ~700 nm display the best electrochemical performance, with a large reversible capacity (845 mA h g(-1) at 100 mA g(-1) after 50 cycles), high coulombic efficiency (>95%), excellent cycling stability and superior rate capability (410 mA h g(-1) at 1 Ag(-1)). These values are among the highest reported for Mn2O3-based bulk solids and nanostructures. Also, electrochemical impedance spectroscopy study demonstrates that the BHP-Mn2O3-SCs are suitable for charge transfer at the electrode/electrolyte interface.

No MeSH data available.


Related in: MedlinePlus

(a) XRD patterns; (b) SEM image; (c) TEM image; and (d) SAED pattern of the as-prepared MnCO3-15.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4593967&req=5

f1: (a) XRD patterns; (b) SEM image; (c) TEM image; and (d) SAED pattern of the as-prepared MnCO3-15.

Mentions: Figure 1a,b show the XRD pattern and SEM image of typical MnCO3 crystal synthesized using 15 mL of distilled-water (MnCO3-15), respectively. These crystals are precursor materials for the BHP-Mn2O3-SCs. All the peaks (Fig. 1a) can be indexed to MnCO3 crystalline phase in a rhombohedral lattice with space group R3c (JCPDS No: 44–1472). SEM image of this sample (Fig. 1b) reveals its monodispersity and uniform parallelepiped morphology with a size of ~700 nm. A typical TEM image and Selected Area Electron Diffraction (SAED) pattern of the MnCO3-15 sample are presented in Fig. 1c,d. The SAED patterns exhibit sharp diffraction spots, indicating the single crystal nature of MnCO3. Thermogravimetric (TG) analysis of the MnCO3-15 was carried out in air from room temperature to 900 °C, with a temperature ramping rate of 5 °C min−1 (see Supplementary Figure S1). The TG profile demonstrates that the decomposition starts at ~300 °C and terminates at ~500 °C, indicating 550 °C is an appropriate annealing temperature to obtain Mn2O3.


Three-Dimensional (3D) Bicontinuous Hierarchically Porous Mn2O3 Single Crystals for High Performance Lithium-Ion Batteries.

Huang SZ, Jin J, Cai Y, Li Y, Deng Z, Zeng JY, Liu J, Wang C, Hasan T, Su BL - Sci Rep (2015)

(a) XRD patterns; (b) SEM image; (c) TEM image; and (d) SAED pattern of the as-prepared MnCO3-15.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4593967&req=5

f1: (a) XRD patterns; (b) SEM image; (c) TEM image; and (d) SAED pattern of the as-prepared MnCO3-15.
Mentions: Figure 1a,b show the XRD pattern and SEM image of typical MnCO3 crystal synthesized using 15 mL of distilled-water (MnCO3-15), respectively. These crystals are precursor materials for the BHP-Mn2O3-SCs. All the peaks (Fig. 1a) can be indexed to MnCO3 crystalline phase in a rhombohedral lattice with space group R3c (JCPDS No: 44–1472). SEM image of this sample (Fig. 1b) reveals its monodispersity and uniform parallelepiped morphology with a size of ~700 nm. A typical TEM image and Selected Area Electron Diffraction (SAED) pattern of the MnCO3-15 sample are presented in Fig. 1c,d. The SAED patterns exhibit sharp diffraction spots, indicating the single crystal nature of MnCO3. Thermogravimetric (TG) analysis of the MnCO3-15 was carried out in air from room temperature to 900 °C, with a temperature ramping rate of 5 °C min−1 (see Supplementary Figure S1). The TG profile demonstrates that the decomposition starts at ~300 °C and terminates at ~500 °C, indicating 550 °C is an appropriate annealing temperature to obtain Mn2O3.

Bottom Line: Our synthesized BHP-Mn2O3-SCs with a size of ~700 nm display the best electrochemical performance, with a large reversible capacity (845 mA h g(-1) at 100 mA g(-1) after 50 cycles), high coulombic efficiency (>95%), excellent cycling stability and superior rate capability (410 mA h g(-1) at 1 Ag(-1)).These values are among the highest reported for Mn2O3-based bulk solids and nanostructures.Also, electrochemical impedance spectroscopy study demonstrates that the BHP-Mn2O3-SCs are suitable for charge transfer at the electrode/electrolyte interface.

View Article: PubMed Central - PubMed

Affiliation: Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, 430070, Wuhan, Hubei, China.

ABSTRACT
Bicontinuous hierarchically porous Mn2O3 single crystals (BHP-Mn2O3-SCs) with uniform parallelepiped geometry and tunable sizes have been synthesized and used as anode materials for lithium-ion batteries (LIBs). The monodispersed BHP-Mn2O3-SCs exhibit high specific surface area and three dimensional interconnected bimodal mesoporosity throughout the entire crystal. Such hierarchical interpenetrating porous framework can not only provide a large number of active sites for Li ion insertion, but also good conductivity and short diffusion length for Li ions, leading to a high lithium storage capacity and enhanced rate capability. Furthermore, owing to their specific porosity, these BHP-Mn2O3-SCs as anode materials can accommodate the volume expansion/contraction that occurs with lithium insertion/extraction during discharge/charge processes, resulting in their good cycling performance. Our synthesized BHP-Mn2O3-SCs with a size of ~700 nm display the best electrochemical performance, with a large reversible capacity (845 mA h g(-1) at 100 mA g(-1) after 50 cycles), high coulombic efficiency (>95%), excellent cycling stability and superior rate capability (410 mA h g(-1) at 1 Ag(-1)). These values are among the highest reported for Mn2O3-based bulk solids and nanostructures. Also, electrochemical impedance spectroscopy study demonstrates that the BHP-Mn2O3-SCs are suitable for charge transfer at the electrode/electrolyte interface.

No MeSH data available.


Related in: MedlinePlus