Nanostructured materials for advanced energy conversion and storage devices

Aricò, A.S.; Bruce, Peter G.; Scrosati, B.; Tarascon, Jean‐Marie; Schalkwijk, Walter van

doi:10.1038/nmat1368

Cited by 8,398 publications

(5,013 citation statements)

References 89 publications

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“…99,100 Recent approaches to further enhancing the electrochemical performance of those systems are encouraged by the development of nanostructured materials, which will be the most important key to success for developing advanced ESSs. 101 …”

Section: Porous Spinel-type Transition Metal Oxides For Energy Storagmentioning

confidence: 99%

Porous nanoarchitectures of spinel-type transition metal oxides for electrochemical energy storage systems

Park

Kim

et al. 2015

Phys. Chem. Chem. Phys.

153

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. (2015). Porous nanoarchitectures of spinel-type transition metal oxides for electrochemical energy storage systems. Physical Chemistry Chemical Physics, 17 (46), 30963-30977. Porous nanoarchitectures of spinel-type transition metal oxides for electrochemical energy storage systems AbstractTransition metal oxides possessing two kinds of metals (denoted as AxB3-xO4, which is generally defined as a spinel structure; A, B = Co, Ni, Zn, Mn, Fe, etc.), with stoichiometric or even non-stoichiometric compositions, have recently attracted great interest in electrochemical energy storage systems (ESSs). The spinel-type transition metal oxides exhibit outstanding electrochemical activity and stability, and thus, they can play a key role in realising cost-effective and environmentally friendly ESSs. Moreover, porous nanoarchitectures can offer a large number of electrochemically active sites and, at the same time, facilitate transport of charge carriers (electrons and ions) during energy storage reactions. In the design of spinel-type transition metal oxides for energy storage applications, therefore, nanostructural engineering is one of the most essential approaches to achieving high electrochemical performance in ESSs. In this perspective, we introduce spinel-type transition metal oxides with various transition metals and present recent research advances in material design of spinel-type transition metal oxides with tunable architectures (shape, porosity, and size) and compositions on the micro-and nano-scale. Furthermore, their technological applications as electrode materials for next-generation ESSs, including metal-air batteries, lithium-ion batteries, and supercapacitors, are discussed. The spinel-type transition metal oxides exhibit outstanding electrochemical activity and stability, and thus, they can play a key role in realising cost-effective and environmentally friendly ESSs. Moreover, porous nanoarchitectures can offer a large number of electrochemically active sites and, at the same time, facilitate transport of charge carriers (electrons and ions) during energy storage reactions. In the design of spinel-type transition metal oxides for energy storage applications, therefore, nanostructural engineering is one of the most essential approaches to achieving high electrochemical performance in ESSs. In this perspective, we introduce spinel-type transition metal oxides with various transition metals and present recent research advances in material design of spinel-type transition metal oxides with tunable architectures (shape, porosity, and size) and compositions on the micro-and nano-scale.Furthermore, their technological applications as electrode materials for next-generation ESSs, including metal-air batteries, lithium-ion batteries, and supercapacitors, are discussed.

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Section: Porous Spinel-type Transition Metal Oxides For Energy Storagmentioning

confidence: 99%

Porous nanoarchitectures of spinel-type transition metal oxides for electrochemical energy storage systems

Park

Kim

et al. 2015

Phys. Chem. Chem. Phys.

153

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“…Because the dominant polarization in a PEM fuel cell comes from the slow cathodic oxygen reduction reaction (ORR) rather than the anodic hydrogen oxidation reaction, reducing the Pt loading (particularly in the cathode catalyst layer) without compromising fuel cell performance is an effective strategy to meet the cost requirements for fuel cell commercialization. [3][4][5] In other words, the design of novel catalysts requires not only reducing the amount of Pt used but also enhancing catalytic activity and stability. 6 In order to address these requirements, several approaches have been developed, including (i) making nanostructures to increase the surface-to-volume ratio; 7 (ii) using an alloying technique to incorporate non-precious metals into the nanostructures; and (iii) texturing nanostructures, for example, replacing the core atoms in Pt nanoparticles with a non-precious metal, resulting in a Pt-skin 8,9 or Pt monolayer on top of catalysts.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Pt-alloy electrocatalysts for PEM fuel cell oxygen reduction reaction

et al. 2010

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In this critical review, we present the current technological advances in proton exchange membrane (PEM) fuel cell catalysis, with a focus on strategies for developing nanostructured Pt-alloys as electrocatalysts for the oxygen reduction reaction (ORR). The achievements are reviewed and the major challenges, including high cost, insufficient activity and low stability, are addressed and discussed. The nanostructured Pt-alloy catalysts can be grouped into different clusters: (i) Pt-alloy nanoparticles, (ii) Pt-alloy nanotextures such as Pt-skins/monolayers on top of base metals, and (iii) branched or anisotropic elongated Pt or Pt-alloy nanostructures. Although some Pt-alloy catalysts with advanced nanostructures have shown remarkable activity levels, the dissolution of metals, including Pt and alloyed base metals, in a fuel cell operating environment could cause catalyst degradation, and still remains an issue. Another concern may be low retention of the nanostructure of the active catalyst during fuel cell operation. To facilitate further efforts in new catalyst development, several research directions are also proposed in this paper (130 references).

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“…The demand for higher capacity and higher power energy storage has led to a surge in interest in nanostructured electrodes. 1 Nanostructuring has been shown to improve the energy storage properties of rutile MnO 2 for both Li-ion batteries 2, 3 and supercapacitors. 4−6 However, the mechanisms for this improvement are not fully understood on the atomic-scale.…”

Section: ■ Introductionmentioning

confidence: 99%

Rutile (β-)MnO₂ Surfaces and Vacancy Formation for High Electrochemical and Catalytic Performance

2014

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MnO 2 is a technologically important material for energy storage and catalysis. Recent investigations have demonstrated the success of nanostructuring for improving the performance of rutile MnO 2 in Li-ion batteries and supercapacitors and as a catalyst. Motivated by this we have investigated the stability and electronic structure of rutile (β-)MnO 2 surfaces using density functional theory. A Wulff construction from relaxed surface energies indicates a rod-like equilibrium morphology that is elongated along the c-axis, and is consistent with the large number of nanowire-type structures that are obtainable experimentally. The (110) surface dominates the crystallite surface area. Moreover, higher index surfaces than considered in previous work, for instance the (211) and (311) surfaces, are also expressed to cap the rod-like morphology. Broken coordinations at the surface result in enhanced magnetic moments at Mn sites that may play a role in catalytic activity. The calculated formation energies of oxygen vacancy defects and Mn reduction at key surfaces indicate facile formation at surfaces expressed in the equilibrium morphology. The formation energies are considerably lower than for comparable structures such as rutile TiO 2 and are likely to be important to the high catalytic activity of rutile MnO 2 . ■ INTRODUCTIONEnergy storage for hybrid electric vehicles and renewable energy sources is a pressing technological challenge for which Li-ion batteries and supercapacitors are key candidate systems. The conventional Li-ion intercalation cathode, LiCoO 2 , faces challenges of toxicity and high cost. Current supercapacitors based on carbon cathodes are limited by their storage capacity. The demand for higher capacity and higher power energy storage has led to a surge in interest in nanostructured electrodes. 1 Nanostructuring has been shown to improve the energy storage properties of rutile MnO 2 for both Li-ion batteries 2,3 and supercapacitors. 4−6 However, the mechanisms for this improvement are not fully understood on the atomic-scale. In addition to its role as an electrode material, nanostructured rutile MnO 2 has been shown to give good performance as a catalyst, 7 with much recent interest in its potential role in the Li−O 2 battery. 8 Knowledge of the surface features of rutile MnO 2 at the atomic and electronic level would provide valuable information regarding its energy storage and catalytic mechanisms. With the clear impetus to better understand the performance of rutile MnO 2 in three technologies, Li-ion batteries, supercapacitors and catalysis, in this work we apply first-principles simulations to understand surface phenomena in this promising material.Rutile MnO 2 is the subject of extensive research for its applications in Li-ion batteries, but early work indicated that bulk samples did not allow significant Li-ion intercalation. 2,9,10

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Nanostructured materials for advanced energy conversion and storage devices

Cited by 8,398 publications

References 89 publications

Porous nanoarchitectures of spinel-type transition metal oxides for electrochemical energy storage systems

Porous nanoarchitectures of spinel-type transition metal oxides for electrochemical energy storage systems

Nanostructured Pt-alloy electrocatalysts for PEM fuel cell oxygen reduction reaction

Rutile (β-)MnO₂ Surfaces and Vacancy Formation for High Electrochemical and Catalytic Performance

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Nanostructured materials for advanced energy conversion and storage devices

Cited by 8,398 publications

References 89 publications

Porous nanoarchitectures of spinel-type transition metal oxides for electrochemical energy storage systems

Porous nanoarchitectures of spinel-type transition metal oxides for electrochemical energy storage systems

Nanostructured Pt-alloy electrocatalysts for PEM fuel cell oxygen reduction reaction

Rutile (β-)MnO2 Surfaces and Vacancy Formation for High Electrochemical and Catalytic Performance

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Rutile (β-)MnO₂ Surfaces and Vacancy Formation for High Electrochemical and Catalytic Performance