Towards real Li-air batteries: A binder-free cathode with high electrochemical performance in CO2 and O2

Zhu, Qian-Cheng; Xu, Shumao; Cai, Zhipeng; Harris, Michelle M.; Wang, Kai‐Xue; Chen, Jie‐Sheng

doi:10.1016/j.ensm.2017.03.004

Cited by 70 publications

(33 citation statements)

References 30 publications

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“…Employing bifunctional electro-catalysts has been verified to facilitate the oxygen redox reactions for Li-air batteries in practical conditions in the absence of OSM. [126][127][128][129][130][131][132][133][134] After substituting Fe on some of the Mn sites in MnOx, the Mn1.8Fe0.2O3 cathode containing Li-air battery showed showed only 25% capacity loss after 10 cycles in ambient air. [127] A Pd nanolayer was reported to have been deposited in situ on Ni foam via a galvanic exchange method.…”

Section: Multifunctional Catalystmentioning

confidence: 99%

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Liu

Guo

et al. 2019

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Over the past few years, great attention has been given to nonaqueous lithium-air batteries owing to their ultrahigh theoretical energy density when compared with other energy storage systems. Most of the research interest, however, is dedicated to batteries operating in pure or dry oxygen atmospheres, while Li-air batteries that operate in ambient air still face big challenges. The biggest challenges are H2O and CO2 that exist in ambient air, which can not only form byproducts with discharge products (Li2O2), but also react with the electrolyte and the Li anode. To this end, recent progress in understanding the chemical and electrochemical reactions of Li-air batteries in ambient air is critical for the development and application of true Li-air batteries. Oxygen-selective membranes, multifunctional catalysts, and electrolyte alternatives for ambient air operational Li-air batteries are presented and discussed comprehensively. In addition, sepa-rator modification and Li anode protection are covered. Furthermore, the challenges and directions for the future development of Li-air batteries are presented

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Section: Multifunctional Catalystmentioning

confidence: 99%

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Liu

Guo

et al. 2019

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“…Subsequently, Figure f compares CC@Mo 2 C NPs with some typical reported Li–CO 2 battery cathode materials in terms of various electrochemical properties. It is found that high specific capacity and low charge plateau have both been integrated into this CC@Mo 2 C NPs hybrid film and its energy efficiency outperforms that of all previous catalysts for Li–CO 2 batteries ever reported . The excellent electrochemical performance of CC@Mo 2 C NPs should be attributed to the significant advantages of this unique 0D/1D hybrid nanostructure as follows: first, 3D porous framework entangled by 1D CNTs supplies enough inner space for the deposition of discharge product, and thus opening more active sites to Li + and CO 2 gas instead of the electrode surface alone.…”

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confidence: 92%

“…For fabricating Li–CO 2 batteries, these catalysts are inevitable to be connected with current collector (e.g., carbon paper and nickel foam) to constitute a porous gas cathode before assembly. As a result, it caused a fact that Li–CO 2 batteries have been produced in a 2D rigid bulk structure while the total mass of energy storage system has been unnecessarily enlarged as well . Such planar indeformable power accessories with heavy weight are obviously not adaptable for flexible and wearable electronics .…”

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confidence: 99%

“…The reduction of overpotential means less electrical power has to be sacrificed during the round‐trip energy storage and release processes, which is of great significance in saving resource and boosting the sustainable development . From Figure e, it is obvious that CC@Mo 2 C NPs deliver a median discharge voltage of 2.68 V and a charge voltage of 3.39 V at the first cycle, thus leading to a satisfying energy efficiency of ≈80%.…”

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confidence: 99%

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A Quasi‐Solid‐State Flexible Fiber‐Shaped Li–CO₂ Battery with Low Overpotential and High Energy Efficiency

et al. 2018

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With the rapidly increasing interests on wearable electronics over the past decades, the limited energy density and nondeformable configuration of conventional 2D lithium-ion batteries (LIBs) have already become the dominant obstacles that are hindering the roads of wearable consumer electronics toward ubiquity. [1][2][3][4][5] Hence, it is urgent to develop an alternative highperformance flexible energy storage device to break through the inherent restrictions of rigid LIBs. [6][7][8] The Li-CO 2 battery, a newly conceptual metal-gas battery, has been considered as a promising candidate for the next-generation high-performance electrochemical energy storage system recently. [9,10] It possesses a high theoretical energy density via the four-electrons transfer reaction (4Li + + 3CO 2 + 4e − → 2Li 2 CO 3 + C, E° = 2.80 V vs Li + /Li) and provides a novel environmentally friendly approach to CO 2 fixing which is of great benefit to alleviate global warming. [11][12][13] Interestingly, the Li-CO 2 battery is also very attractive for aerospace exploration; for example, it may be a possible energy system for providing electricity on Mars where the atmosphere consists of 96% CO 2 gas. [14] In spite of the aforementioned favorable factors, very few reports in the literature related to flexible Li-CO 2 battery devices for wearable electronics have been reported so far. After systematical investigations, it is found that the main challenges of fabricating high-performance flexible Li-CO 2 battery devices lie in the following three aspects: (1) carbon nanophases (e.g., Ketjenblack, [9,10,15] CNTs, [11,16] graphene [17,18] ), which dominate those known Li-CO 2 battery catalysts, induce the formation of Li 2 CO 3 , a wide-bandgap insulator. [19,20] It results in a sluggish kinetics for CO 2 evolution so that a high charge potential of 4.2-4.6 V was commonly required to drive the degradation of Li 2 CO 3 in most previous Li-CO 2 batteries. [10,11,17] Such high potential not only increases the risk of electrolyte decomposition but also accelerates the oxidation of electrodes. [21,22] Meanwhile, originated from the incomplete decomposition, more and more solid carbonate species accumulated in the surface of cathode during cycling, leading to a distinct decrease on catalytic performance and even the rapid extension of impedance up to a "sudden death" of the battery. [20,23,24] Consequently, the majority of those reported Li-CO 2 batteries showed a negligibleThe rapid development of wearable electronics requires a revolution of power accessories regarding flexibility and energy density. The Li-CO 2 battery was recently proposed as a novel and promising candidate for nextgeneration energy-storage systems. However, the current Li-CO 2 batteries usually suffer from the difficulties of poor stability, low energy efficiency, and leakage of liquid electrolyte, and few flexible Li-CO 2 batteries for wearable electronics have been reported so far. Herein, a quasi-solidstate flexible fiber-shaped Li-CO 2 battery with low overpotential and ...

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“…Many efforts have been made to solve the problems by introducing cathode catalysts with both CO 2 reduction and evolution activities . Metal‐based materials showed higher activity than the initial carbon‐based ones for rechargeable Li‐CO 2 batteries.…”

Section: Introductionmentioning

confidence: 99%

Fabricating Ir/C Nanofiber Networks as Free‐Standing Air Cathodes for Rechargeable Li‐CO₂ Batteries

Wang

Zhang

et al. 2018

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Li-CO batteries are promising energy storage systems by utilizing CO at the same time, though there are still some critical barriers before its practical applications such as high charging overpotential and poor cycling stability. In this work, iridium/carbon nanofibers (Ir/CNFs) are prepared via electrospinning and subsequent heat treatment, and are used as cathode catalysts for rechargeable Li-CO batteries. Benefitting from the unique porous network structure and the high activity of ultrasmall Ir nanoparticles, Ir/CNFs exhibit excellent CO reduction and evolution activities. The Li-CO batteries present extremely large discharge capacity, high coulombic efficiency, and long cycling life. Moreover, free-standing Ir/CNF films are used directly as air cathodes to assemble Li-CO batteries, which show high energy density and ultralong operation time, demonstrating great potential for practical applications.

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Towards real Li-air batteries: A binder-free cathode with high electrochemical performance in CO2 and O2

Cited by 70 publications

References 30 publications

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

A Quasi‐Solid‐State Flexible Fiber‐Shaped Li–CO₂ Battery with Low Overpotential and High Energy Efficiency

Fabricating Ir/C Nanofiber Networks as Free‐Standing Air Cathodes for Rechargeable Li‐CO₂ Batteries

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Towards real Li-air batteries: A binder-free cathode with high electrochemical performance in CO2 and O2

Cited by 70 publications

References 30 publications

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

Critical Advances in Ambient Air Operation of Nonaqueous Rechargeable Li–Air Batteries

A Quasi‐Solid‐State Flexible Fiber‐Shaped Li–CO2 Battery with Low Overpotential and High Energy Efficiency

Fabricating Ir/C Nanofiber Networks as Free‐Standing Air Cathodes for Rechargeable Li‐CO2 Batteries

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A Quasi‐Solid‐State Flexible Fiber‐Shaped Li–CO₂ Battery with Low Overpotential and High Energy Efficiency

Fabricating Ir/C Nanofiber Networks as Free‐Standing Air Cathodes for Rechargeable Li‐CO₂ Batteries