A carbon-free ruthenium oxide/mesoporous titanium dioxide electrode for lithium-oxygen batteries

Park, Jin Bum; Belharouak, Ilias; Lee, Yun Jung; Sun, Yang Kook

doi:10.1016/j.jpowsour.2015.07.030

Cited by 33 publications

(15 citation statements)

References 30 publications

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“…Interestingly, the crystallinity of TiO 2 (functioning as a catalyst support) plays a crucial role on the electrochemical activity of both ORR and OER, with amorphous TiO 2 showing superior discharge capacity compared to crystalline TiO 2 support. Nonetheless, mesoporous crystalline TiO 2 (1.8 × 10 −10 S cm −1 ) offers facile synthesis routes, good porosity control, and eight‐orders of magnitude improved electrical conductivity when coupled with RuO 2 nanoparticles . Electrochemical impedance spectroscopy (EIS) analysis showed a 30‐fold decrease in charge transfer resistance due to RuO 2 addition to TiO 2 (from 1470 to 46.61 Ω).…”

Section: Toward Carbon‐free Air Electrodesmentioning

confidence: 99%

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O₂ Batteries

Balaish

Jung

Kim

et al. 2019

Adv Funct Materials

147

100

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This review reports on the most updated technological aspects of Li-air battery cathode materials. It provides the reader with recent developments, alongside critical views. The requirements for air-cathodes, as well as the classification and characterization of carbon-based and carbon-free air cathodes, are listed. The effects of two major substituent groups of materials, namely carbon and advanced materials (metals, metal-oxides, metal-carbides, and metal-nitrides) aimed at replacing carbon, are discussed in terms of their chemical and electrochemical stability. The report covers aspects of surface chemistry and structure influence on the electrolyte and discharge products stability. The review also reports on the efforts to suppress side reactions and deterioration of the polymeric binders (if a composite electrode is being considered). This is recognized as a means to enhance Li-air battery performance. The report concludes with an outlook and perspective, providing the readers with some insight on other factors and their impact on the long road toward a viable air-cathode suitable for Li-air battery operations.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201808303.respectively. [1] The configuration of an aprotic LOB is based on coupling lithium metal anode and air-breathing cathode in a non-aqueous electrolyte system. The electrochemical reactions occurring during discharge are complex multistep reactions and may involve dissolved and/or adsorbed species alongside parasitic reactions. [2][3][4][5] Oxygen reduction reaction during discharge largely depends on the cathode and electrolytes characteristics; yet, a dominant process involving a two-electron oxygen reduction reaction (ORR), with the formation of Li 2 O 2 , is reported, according to the following reaction [6] The reverse process, namely lithium peroxide oxidation, occurs upon charging. The formation/decomposition of Li 2 O 2 during discharge/charge is often accompanied by parasitic side reactions, due to instability of the major battery components (cathode, electrolyte, and anode) under operating conditions. [7][8][9][10][11][12] While lithium metal anode corrosion can be mitigated by a protective solid electrolyte (SE) membrane, [13][14][15] the electrolyte and cathode are considered as the most challenging components of LOB. Much efforts have been placed on understanding the role of the electrolyte, its degradation, on Li-O 2 reaction mechanism and battery performance. [16][17][18][19][20] Nonetheless, the high discharge/ charge overpotential and severe capacity loss in the course of cycling are also largely related to the air-breathing cathode. A stable, high surface area, cost-efficient air-electrode with excellent catalytic activities toward oxygen reduction and oxidation is crucial for the development of practical LOB. Cathode materials should be stable, durable, and hold interfaces with minimum surface oxide layers, which can inhibit charge transfer during the charging p...

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Section: Toward Carbon‐free Air Electrodesmentioning

confidence: 99%

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O₂ Batteries

Balaish

Jung

Kim

et al. 2019

Adv Funct Materials

147

100

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“…A comparative study of RuO 2 -nanoporous gold (NPG), MnO 2 -NPG, and Co 3 O 4 -NPG indicated that the best performance and highest RTE (with reduction in both ORR and OER overpotentials) can be achieved with the RuO 2 -NPG composite (Figure 19a). [115][116][117][118][119][120] RuO 2 , when uniformly coated on CNTs, shows a high RTE of ≈79% at 100 mA g total 1 E − , which is comparable to noble-metal-adapted Li-O 2 cells (Figure 19b,c). We can thus conclude that RuO 2 has a comparable catalytic activity to that of noble metals, and various catalysts incorporating RuO 2 have been suggested, such as carbon-spheres/Co 3 O 4 -RuO 2 , MnRu x O y , hollow RuO 2 spheres, RuO 2 -TiO 2 , RuO 2 -carbon nanofibers, and RuO 2 -reduced-graphene-oxide (RGO).…”

Section: Au-mos 2 Au-nico 2 O 4 Pd-co 3 O 4 Pd-mno 2 Pd-zno Andmentioning

confidence: 64%

High‐Energy‐Density Metal–Oxygen Batteries: Lithium–Oxygen Batteries vs Sodium–Oxygen Batteries

et al. 2017

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The development of next-generation energy-storage devices with high power, high energy density, and safety is critical for the success of large-scale energy-storage systems (ESSs), such as electric vehicles. Rechargeable sodium-oxygen (Na-O ) batteries offer a new and promising opportunity for low-cost, high-energy-density, and relatively efficient electrochemical systems. Although the specific energy density of the Na-O battery is lower than that of the lithium-oxygen (Li-O ) battery, the abundance and low cost of sodium resources offer major advantages for its practical application in the near future. However, little has so far been reported regarding the cell chemistry, to explain the rate-limiting parameters and the corresponding low round-trip efficiency and cycle degradation. Consequently, an elucidation of the reaction mechanism is needed for both lithium-oxygen and sodium-oxygen cells. An in-depth understanding of the differences and similarities between Li-O and Na-O battery systems, in terms of thermodynamics and a structural viewpoint, will be meaningful to promote the development of advanced metal-oxygen batteries. State-of-the-art battery design principles for high-energy-density lithium-oxygen and sodium-oxygen batteries are thus reviewed in depth here. Major drawbacks, reaction mechanisms, and recent strategies to improve performance are also summarized.

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“…During the last several years, TiO 2 materials were discussed as effective catalysts and catalyst substrates for Li–O 2 batteries because of their remarkable chemical stability and great physicochemical properties. Zhao et al considered TiO 2 nanotubes as anchors for electrocatalysts (RuO 2 and Pt). The authors highlighted the use of TiO 2 reduced electrolyte decomposition and side reactions to improve the cycle life of Li–O 2 batteries.…”

Section: Applicationmentioning

confidence: 99%

Synthesis and Progress of New Oxygen‐Vacant Electrode Materials for High‐Energy Rechargeable Battery Applications

Wang

Xiao

et al. 2018

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During the last few years, a great amount of oxygen-vacant materials have been synthetized and applied as electrodes for electrochemical storage. The presence of oxygen vacancies leads to an increase in the conductivity and the diffusion coefficient; consequently, the controllable synthesis of oxygen vacancy plays an important role in improving the electrochemical performance, including achieving high specific capacitance, high power density, high energy density, and good cycling stability of the electrode materials for batteries. This review mainly focuses on research progress in the preparation of oxygen-vacant nanostructures and the application of materials with oxygen vacancies in various batteries (such as lithium-ion, lithium-oxygen, and sodium-ion batteries). Challenges related to and opportunities for oxygen-vacant materials are also provided.

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A carbon-free ruthenium oxide/mesoporous titanium dioxide electrode for lithium-oxygen batteries

Cited by 33 publications

References 30 publications

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O₂ Batteries

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O₂ Batteries

High‐Energy‐Density Metal–Oxygen Batteries: Lithium–Oxygen Batteries vs Sodium–Oxygen Batteries

Synthesis and Progress of New Oxygen‐Vacant Electrode Materials for High‐Energy Rechargeable Battery Applications

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A carbon-free ruthenium oxide/mesoporous titanium dioxide electrode for lithium-oxygen batteries

Cited by 33 publications

References 30 publications

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O2 Batteries

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O2 Batteries

High‐Energy‐Density Metal–Oxygen Batteries: Lithium–Oxygen Batteries vs Sodium–Oxygen Batteries

Synthesis and Progress of New Oxygen‐Vacant Electrode Materials for High‐Energy Rechargeable Battery Applications

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A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O₂ Batteries

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O₂ Batteries