Reconstruction of Mini‐Hollow Polyhedron Mn<sub>2</sub>O<sub>3</sub> Derived from MOFs as a High‐Performance Lithium Anode Material

Cao, Kangzhe; Jiao, Lifang; Xu, Hang; Liu, Huiqiao; Kang, Hongyan; Zhao, Yan; Liu, Yongchang; Wang, Yijing; Yuan, Huatang

doi:10.1002/advs.201500185

Cited by 95 publications

(39 citation statements)

References 62 publications

(115 reference statements)

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“…This result is similar to our previous work, indicating that the as‐prepared Mn x O y film is of amorphous nature . After annealed at 500 °C for 3 h in atmosphere, the newly generated peaks are in good agreement with the standard pattern of Mn 2 O 3 phase with a cubic structure (JCPDS 41–1442), confirming pure Mn 2 O 3 in composition …”

Section: Resultssupporting

confidence: 90%

Pseudocapacitance‐Enhanced High‐Rate Lithium Storage in “Honeycomb”‐like Mn₂O₃ Anodes

et al. 2017

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The realization of high‐power lithium‐ion batteries (LIBs) is heavily hampered by intrinsically slow lithium diffusion within solid electrodes. Capacitive‐like lithium storage behavior observed in transition‐metal oxide (TMO)‐based anodes shed light on attaining battery‐like capacity and supercapacitor‐like rate performance simultaneously. Herein, “honeycomb”‐like Mn2O3 films were successfully demonstrated as anodes for LIBs, in which the pseudocapacitive effect is strengthened upon cycling, resulting in a high‐rate lithium storage capability. Such pseudocapacitance originates from the unique porous structure and cycle‐induced microstructure evolution. The reticular Mn2O3 can reach 1584.9 mAh g−1 over 250 cycles at 1 A g−1, 1564.9 mAh g−1 after 500 cycles at 5 A −1, and 475.6 mAh g−1 at 15 A g−1.

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Section: Resultssupporting

confidence: 90%

Pseudocapacitance‐Enhanced High‐Rate Lithium Storage in “Honeycomb”‐like Mn₂O₃ Anodes

et al. 2017

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“…The stronger Raman peak (Figure c) at 646 cm −1 and the smaller peaks at 370 and 310 cm −1 are attributed to Mn 3 O 4 , and the band at 646 cm −1 overlaps a Raman band for MnO (654 cm −1 ) . The fitted peaks of the Mn 2p 3/2 spectrum surveyed by X‐ray photoelectron spectroscopy (XPS) indicate a mixed valence of Mn (‖) and Mn (III), as shown in Figure S3a (Supporting Information), in accordance with the analysis of the XRD patterns and Raman spectra. It is worth mentioning that the XPS peaks for Mn could not be observed before Ar‐ion‐beam etching (Figure S3b, Supporting Information), indicating that the MnO x is covered by a thick carbon layer (>10 nm) in the MnO x @C‐Cu.…”

Section: Resultssupporting

confidence: 70%

“…The initial reversible capacity is around 563 mA h g −1 at a current density of 0.4 A g −1 . After an obvious capacity increase, a capacity of 1022 mA h g −1 is obtained after 250 cycles and then stabilized at 1030 mA h g −1 up to 350 cycles, while the capacity contributed by carbonized PVP is only about 6 mA h g −1 , which could be neglected as indicated by Figure S7 (Supporting Information). The corresponding MnO x @C conventional electrode shows limited cycling stability and low capacity.…”

Section: Resultsmentioning

confidence: 99%

A Foolproof Method to Fabricate Integrated Electrodes with 3D Conductive Networks: A Case Study of MnO_x@C‐Cu as Li‐Ion Battery Anode

Cao

Liu

Chang

et al. 2016

Adv Materials Technologies

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Integrated electrodes have attracted numerous attention for their wide applications, such as in battery, supercapacitor, and catalyst (for oxygen reduction reaction, oxygen evolution reaction, and hydrogen reduction reaction). When used for Li‐ion batteries, these electrodes always show superior electrochemical performance for their merits, such as binder free, open framework, and robust adherence. Nevertheless, the current integrated electrodes usually lack an effective conductive network or require a tedious postfabrication process. Herein, polyvinylpyrrolidone (PVP) is used as a bifunctional material, for its cohesiveness and ability of acting as N‐doping carbon precursor, to fabricate integrated electrodes with 3D conductive networks. Owing to its high N content (12.4 wt%), large volume shrinkage, and gas production, porous conductive network forms when PVP is carbonized. This strategy is foolproof, low cost, and can be scaled‐up. The electrodes fabricated by this method epitomize the merits of 3D conductive network, integrated structure, and open framework. As an example, MnOx@C‐Cu shows excellent electrochemical performance (1030 mA h g−1 at 0.4 A g−1 up to 350th cycles, and 320 mA h g−1 at 2.0 A g−1) when evaluated as Li‐ion battery anode owing to these merits. Moreover, other functional integrated electrodes are developed, paving an easy way to fabricate integrated electrodes with 3D conductive networks.

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“…Unlike the relatively stable Ni(OH)2 and Co(OH)2, Mn(OH)2 is easily oxidized by dissolved oxygen in the solvent, which leads to a mixed phase of Mn3O4 and Mn2O3 (Figure 2c). 52,53 The HRTEM images and SAED patterns of Ni(OH)2 samples demonstrate the formation of β/γ-NiOOH in 2DNLA and γ-NiOOH in 2DNWS, which may originate from the electron-beam-induced crystallization of β/α-Ni(OH)2 and α-Ni(OH)2, respectively ( Figure 2d). 54 To study the effect of aggregate architecture on the performance in practical applications, Ni(OH)2 was first taken as an example, and its OER catalytic properties were evaluated by rotating disk electrode (RDE) measurements in alkaline media ( Figure 3).…”

Section: Resultsmentioning

confidence: 99%

Manipulating the Architecture of Atomically Thin Transition Metal (Hydr)oxides for Enhanced Oxygen Evolution Catalysis

Dou

Zhang

et al. 2018

ACS Nano

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Graphene-like nanomaterials have received tremendous research interest due to their atomic thickness and fascinating properties. Previous studies mainly focus on the modulation of their electronic structures, which undoubtedly optimizes the electronic properties, but is not the only determinant of performance in practical applications. Herein, we propose a generalized strategy to incrementally manipulate the architectures of several atomically thin transition metal (hydr)oxides, and study their effects on catalytic water oxidation. The results demonstrate the obvious superiority of a wrinkled nanosheet architecture in both catalytic activity and durability. For instance, wrinkled Ni(OH) nanosheets display a low overpotential of 358.2 mV at 10 mA cm, a high current density of 187.2 mA cm at 500 mV, a small Tafel slope of 54.4 mV dec, and excellent long-term durability with gradually optimized performance, significantly outperforming other nanosheet architectures and previously reported catalysts. The outstanding catalytic performance is mainly attributable to the 3D porous network structure constructed by wrinkled nanosheets, which not only provides sufficient contact between electrode materials and current collector, but also offers highly accessible channels for facile electrolyte diffusion and efficient O escape. Our study provides a perspective on improving the performance of graphene-like nanomaterials in a wide range of practical applications.

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Reconstruction of Mini‐Hollow Polyhedron Mn₂O₃ Derived from MOFs as a High‐Performance Lithium Anode Material

Cited by 95 publications

References 62 publications

Pseudocapacitance‐Enhanced High‐Rate Lithium Storage in “Honeycomb”‐like Mn₂O₃ Anodes

Pseudocapacitance‐Enhanced High‐Rate Lithium Storage in “Honeycomb”‐like Mn₂O₃ Anodes

A Foolproof Method to Fabricate Integrated Electrodes with 3D Conductive Networks: A Case Study of MnO_x@C‐Cu as Li‐Ion Battery Anode

Manipulating the Architecture of Atomically Thin Transition Metal (Hydr)oxides for Enhanced Oxygen Evolution Catalysis

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Reconstruction of Mini‐Hollow Polyhedron Mn2O3 Derived from MOFs as a High‐Performance Lithium Anode Material

Cited by 95 publications

References 62 publications

Pseudocapacitance‐Enhanced High‐Rate Lithium Storage in “Honeycomb”‐like Mn2O3 Anodes

Pseudocapacitance‐Enhanced High‐Rate Lithium Storage in “Honeycomb”‐like Mn2O3 Anodes

A Foolproof Method to Fabricate Integrated Electrodes with 3D Conductive Networks: A Case Study of MnOx@C‐Cu as Li‐Ion Battery Anode

Manipulating the Architecture of Atomically Thin Transition Metal (Hydr)oxides for Enhanced Oxygen Evolution Catalysis

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Reconstruction of Mini‐Hollow Polyhedron Mn₂O₃ Derived from MOFs as a High‐Performance Lithium Anode Material

Pseudocapacitance‐Enhanced High‐Rate Lithium Storage in “Honeycomb”‐like Mn₂O₃ Anodes

Pseudocapacitance‐Enhanced High‐Rate Lithium Storage in “Honeycomb”‐like Mn₂O₃ Anodes

A Foolproof Method to Fabricate Integrated Electrodes with 3D Conductive Networks: A Case Study of MnO_x@C‐Cu as Li‐Ion Battery Anode