Carbon Nanotube Electrode Materials for Li-air Cells

Dai, Jinxiang; Kogut, Thomas; Jin, Lei; Reisner, David

doi:10.1149/1.2943258

Cited by 9 publications

(6 citation statements)

References 7 publications

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“…Porous carbons are generally considered as defective crystallites of graphite. 355 To date, various carbons such as activated carbon, carbon nanotubes, Super P, Ketjen Black, Vulcan XC-72 4,5,59,124,216,244,356,357 have been used in Li-O 2 batteries. Yang et al 358 reported a the comparison of the physical parameters and specific capacities of various carbons as listed in Table 3.…”

Section: Cathode Materialsmentioning

confidence: 99%

Key scientific challenges in current rechargeable non-aqueous Li–O2 batteries: experiment and theory

Bhatt

Geaney

Nolan³

et al. 2014

Phys. Chem. Chem. Phys.

127

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Rechargeable Li-air (henceforth referred to as Li-O2) batteries provide theoretical capacities that are ten times higher than that of current Li-ion batteries, which could enable the driving range of an electric vehicle to be comparable to that of gasoline vehicles. These high energy densities in Li-O2 batteries result from the atypical battery architecture which consists of an air (O2) cathode and a pure lithium metal anode. However, hurdles to their widespread use abound with issues at the cathode (relating to electrocatalysis and cathode decomposition), lithium metal anode (high reactivity towards moisture) and due to electrolyte decomposition. This review focuses on the key scientific challenges in the development of rechargeable non-aqueous Li-O2 batteries from both experimental and theoretical findings. This dual approach allows insight into future research directions to be provided and highlights the importance of combining theoretical and experimental approaches in the optimization of Li-O2 battery systems.

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Section: Cathode Materialsmentioning

confidence: 99%

Key scientific challenges in current rechargeable non-aqueous Li–O2 batteries: experiment and theory

Bhatt

Geaney

Nolan³

et al. 2014

Phys. Chem. Chem. Phys.

127

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“…Various kinds of cathode materials have been investigated to reduce potential hysteresis and thus to improve the round-trip efficiency of Li–oxygen batteries. The materials include nanostructured carbons, − metals, − transition-metal oxides, − transition-metal nitrides, , and transition-metal carbides. − All of the investigated catalysts have limitations such as low onset potentials, low limiting currents, and poor stabilities under nonaqueous conditions, and the battery performances need to be improved further to make Li–O 2 battery technology reliable. Studies on cathode electrocatalysts have indicated that the charge voltage, the discharge capacity, and the capacity retention are substantially dependent on the type of electrocatalyst used at the cathode, the selection of the electrolyte, and experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Lithium–Oxygen Battery Performances with Pt Subnanocluster Decorated N-Doped Single-Walled Carbon Nanotube Cathodes

et al. 2016

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Achieving dramatic improvement in long-term cycling performance in Li–O2 batteries continues to remain a challenge, which is imperative for turning their alluring promise into reality. Developing a bifunctional cathode material capable of reducing overpotentials and enhancing the long-term cycling performances holds the key. Herein, bifunctional cathodes for Li–O2 batteries were prepared by electrodeposited Pt subnanoclusters on pristine as well as nitrogen-doped single-walled carbon nanotubes (SWCNTs) using rotating disk electrode voltammetry techniques. Diffraction, microscopic, and spectroscopic techniques were used to characterize the prepared materials, and the phase purity of the materials was confirmed. Microscopic analysis depicted a fine dispersion of ≤2 nm Pt nanoclusters on single-walled carbon nanotubes. Rotating disk electrode voltammetry measurements indicated low overpotentials as well as high catalytic ORR/OER activities with Pt nanocluster decorated SWCNTs in comparison to Pt-free SWCNTs. Among the investigated cathodes, Pt/N-SWCNTs exhibited high discharge capacities of 7685 and 5907 mAh/g at 100 and 500 mA/g, respectively, and also good capacity retention. Moreover, a stable capacity of 3000 mAh/g with 100% Coulombic efficiency at 500 mA/g was demonstrated under repeated cycling conditions. On the basis of the ex situ Raman spectroscopic studies, the high Li–O2 battery performance of the Pt/N-SWCNT cathode was attributed to the high decomposition activity of Li2O2 and negligible amount of Li2O2 accumulated on the electrode surface during cycling.

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“…20 Up to now, various commercially available carbons, including activated carbon (AC), Vulcan XC-72, Ketjen Black (KB), carbon nanotubes (CNTs), Super P, etc. [21][22][23][24][25][26][27][28] have been employed in LABs. Yang et al compared the physical parameters and specific capacities of several carbons, 29 as shown in Table I.…”

mentioning

confidence: 99%

Carbon-Based Electrodes for Lithium Air Batteries: Scientific and Technological Challenges from a Modeling Perspective

Franco

Xue

2013

ECS J. Solid State Sci. Technol.

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The carbon-based positive electrode of Lithium Air Batteries (LABs) is the component where the major competitive mechanisms occur, such as the electrochemical reactions leading to the formation and decomposition of multiple types of lithium oxides, lithium ion and electronic transport as well as oxygen transport. Through a multiscale viewpoint, this review discusses available models describing LAB carbon-based electrodes from the atomistic to continuum approaches. Relevance of those approaches versus experimental data as well as the remaining scientific and technological challenges of these technologies are analyzed. Finally, this review briefly introduces a new theory aiming at studying the impact of the positive electrode carbon structure onto the cyclability of LABs.

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Carbon Nanotube Electrode Materials for Li-air Cells

Cited by 9 publications

References 7 publications

Key scientific challenges in current rechargeable non-aqueous Li–O2 batteries: experiment and theory

Key scientific challenges in current rechargeable non-aqueous Li–O2 batteries: experiment and theory

Enhanced Lithium–Oxygen Battery Performances with Pt Subnanocluster Decorated N-Doped Single-Walled Carbon Nanotube Cathodes

Carbon-Based Electrodes for Lithium Air Batteries: Scientific and Technological Challenges from a Modeling Perspective

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