Three-dimensionally semi-ordered macroporous air electrodes for metal–oxygen batteries

Lim, Hyung‐Seok; Kwak, Won‐Jin; Nguyen, Dan Thien; Wang, Wei; Xu, Wu; Zhang, Ji‐Guang

doi:10.1039/d2ta09442h

Cited by 8 publications

(1 citation statement)

References 42 publications

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“…Disturbingly, the micron sized products during discharge tend to block the micropores and mesoporous channels of the cathode catalyst, which restricts the electrolyte transport during the charge discharge process and further leads to catalyst deactivation in high charge-discharge overpotential. The macroporous structure significantly promotes electrolyte or reactant transport at active sites without substantially reducing catalytic material density, which can improve rate performance in lithium storage devices [153,154]. Studies have demonstrated that HPC materials have higher charge transfer ability at the solid-liquid interface, which effectively prevents charge accumulation and reduces polarization effect [155][156][157].…”

Section: Application Of Hpc Materials In Lithium Storage Devicesmentioning

confidence: 99%

Hierarchical porous carbon materials for lithium storage: preparation, modification, and applications

Ying,

Yin,

Zhao

et al. 2024

Nanotechnology

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Secondary battery as an efficient energy conversion device have been highly attractive for alleviating the energy crisis and environmental pollution. Hierarchical porous carbon materials with multiple sizes pore channels are considered as promising materials for energy conversion and storage applications, due to their high specific surface area and excellent electrical conductivity. Although many reviews have reported on carbon materials for different fields, systematic summaries about hierarchical porous carbon materials for lithium storage are still rare. In this review, we fist summarize the main preparation methods of hierarchical porous carbon materials, including hard template method, soft template method, and template-free method. The modification methods including porosity and morphology tuning, heteroatom doping, and multiphase composites are introduced systematically. Then, the recent advances in hierarchical porous carbon materials on lithium storage are summarized. Finally, we outline the challenges and future perspectives for the application of hierarchical porous carbon materials in lithium storage.

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Section: Application Of Hpc Materials In Lithium Storage Devicesmentioning

confidence: 99%

Hierarchical porous carbon materials for lithium storage: preparation, modification, and applications

Ying,

Yin,

Zhao

et al. 2024

Nanotechnology

View full text Add to dashboard Cite

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Enhanced Ion Transport Through Mesopores Engineered with Additional Adsorption of Layered Double Hydroxides Array in Alkaline Flow Batteries

Wang,

Zhang,

et al. 2023

Small

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Efficient mass transfer in electrodes is essential for the electrochemical processes of battery charge and discharge, especially at high rates and capacities. This study introduces a 3D electrode design featuring layered double hydroxides (LDHs) nanosheets array grown in situ on a carbon felt surface for flow batteries. The mesoporous structure and surface characteristic of LDH nanosheets, especially, the hydroxyl groups forming a unique “H‐bonding‐like” geometry with ferrous cyanide ions, facilitate efficient adsorption and ion transport. Thus, the designed LDHs electrode enables the alkaline zinc‐iron flow battery to maintain a voltage efficiency of 81.6% at an ultra‐high current density of 320 mA cm−2, surpassing the values reported in previous studies. The energy efficiency remains above 84% after 375 cycles at a current density of 240 mA cm−2. Molecular dynamics simulations verify the enhanced adsorption effect of LDH materials on active ions, thus facilitating ion transport in the battery. This study provides a novel approach to improve mass transport in electrodes for alkaline flow batteries and other energy storage devices.

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External Field‐Assisted Metal–Air Batteries: Mechanisms, Progress, and Prospects

Cao,

Liu,

et al. 2024

SusMat

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Metal–air batteries are an appealing option for energy storage, boasting a high energy density and environmental sustainability. Researchers focus on the catalyst design to solve the problem of sluggish cathode reaction kinetic. However, in some cases, where thermodynamic regulation is required, the role of catalysts is limited. Based on catalysts changing reaction kinetics, external fields can change the thermodynamic parameters of the reaction, further reduce overpotential, and accelerate the reaction rate. By selecting appropriate external fields and adjusting controllable variables, greater flexibility and potential are provided for reaction control. This paper reviews the basic principles by which several external fields influence metal–air batteries. Additionally, some design strategies of photoelectrode materials, the similarities and differences of different magnetic field effects, and some research progress of the ultrasonic field, stress field, and microwave field are systematically summarized. Multifield coupling can also interact and produce additive effects. Furthermore, introducing external fields will also bring about the problem of aggravated side reactions. This paper proposes some research methods to explore the specific reaction mechanism of external field assistance in more depth. The primary objective is to furnish theoretical direction for enhancing the performance of external field‐supported metal–air batteries, thereby advancing their development.

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Three-dimensionally semi-ordered macroporous air electrodes for metal–oxygen batteries

Abstract: A three-dimensionally semi-ordered macroporous air electrode can minimize the blocking of air electrodes and improve performance of metal oxygen batteries.

Cited by 8 publications

References 42 publications

Hierarchical porous carbon materials for lithium storage: preparation, modification, and applications

Hierarchical porous carbon materials for lithium storage: preparation, modification, and applications

Enhanced Ion Transport Through Mesopores Engineered with Additional Adsorption of Layered Double Hydroxides Array in Alkaline Flow Batteries

External Field‐Assisted Metal–Air Batteries: Mechanisms, Progress, and Prospects

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