Robust Design of Dual‐Phasic Carbon Cathode for Lithium–Oxygen Batteries

Pham, Hien Thi Thu; Kim, Yeongsu; Kim, Young‐Jun; Lee, Jun Young; Park, Min

doi:10.1002/adfm.201902915

Cited by 35 publications

(28 citation statements)

References 54 publications

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“…To fabricate cathodes for LOBs, the suspension of MPC@ CNT was prepared using deionized water and was coated directly onto a glass-fiber membrane (1.2 μm pore diameter) via vacuum-assisted filtration, as reported in our previous study [19]. Neither a polymeric binder nor a conductive agent was used.…”

Section: Electrochemical Experimentsmentioning

confidence: 99%

“…Thus, carbon has been considered to be viable cathode materials for LOBs that satisfy technical requirements such as large surface area, well-defined pore structure, high electrical conductivity, and low cost [3,11]. Particularly, nanostructured porous carbon materials have attracted significant attention as promising cathodes for LOBs owing to their unique architectures, as they can offer sufficient pore volume for oxygen transport and Li 2 O 2 storage, and have the high surface areas with many electrochemical active sites for oxygen reactions [3,11,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…It was suggested that Li 2 O 2 was formed preferentially in the mesopores of the 3DOm carbon during discharge, thereby achieving a high capacity for LOBs. Recently, Lee and Park reported dualphasic carbon nanoarchitectures, in which highly porous carbon nanoparticles derived from MOFs were interwoven with conductive carbon nanotubes (CNTs) as promising cathodes for LOBs [19].…”

Section: Introductionmentioning

confidence: 99%

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Synergistic nanoarchitecture of mesoporous carbon and carbon nanotubes for lithium–oxygen batteries

et al. 2021

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A rechargeable lithium–oxygen battery (LOB) operates via the electrochemical formation and decomposition of solid-state Li2O2 on the cathode. The rational design of the cathode nanoarchitectures is thus required to realize high-energy-density and long-cycling LOBs. Here, we propose a cathode nanoarchitecture for LOBs, which is composed of mesoporous carbon (MPC) integrated with carbon nanotubes (CNTs). The proposed design has the advantages of the two components. MPC provides sufficient active sites for the electrochemical reactions and free space for Li2O2 storage, while CNT forests serve as conductive pathways for electron and offer additional reaction sites. Results show that the synergistic architecture of MPC and CNTs leads to improvements in the capacity (~ 18,400 mAh g− 1), rate capability, and cyclability (~ 200 cycles) of the CNT-integrated MPC cathode in comparison with MPC.

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Section: Electrochemical Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synergistic nanoarchitecture of mesoporous carbon and carbon nanotubes for lithium–oxygen batteries

et al. 2021

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“…Battery storage systems have been widely applied in many fields, such as renewables storage, peak shaving, emergency back-up, load-leveling and electric vehicles [1]. Specifically, the all-vanadium redox flow battery (VRB) proposed by Skyllas-Kazacos [2,3] and co-workers shows unique attributes, including cross contamination elimination and a long life cycle [4,5].…”

Section: Introductionmentioning

confidence: 99%

Model-Based Condition Monitoring of a Vanadium Redox Flow Battery

2019

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The safe, efficient and durable utilization of a vanadium redox flow battery (VRB) requires accurate monitoring of its state of charge (SOC) and capacity decay. This paper focuses on the unbiased model parameter identification and model-based monitoring of both the SOC and capacity decay of a VRB. Specifically, a first-order resistor-capacitance (RC) model was used to simulate the dynamics of the VRB. A recursive total least squares (RTLS) method was exploited to attenuate the impact of external disturbances and accurately track the change of model parameters in realtime. The RTLS-based identification method was further integrated with an H-infinity filter (HIF)-based state estimator to monitor the SOC and capacity decay of the VRB in real-time. Experiments were carried out to validate the proposed method. The results suggested that the proposed method can achieve unbiased model parameter identification when unexpected noises corrupt the current and voltage measurements. SOC and capacity decay can also be estimated accurately in real-time without requiring additional open-circuit cells.Energies 2019, 12, 3005 2 of 16 the SOC [9]. This method, albeit accurate, is ex-situ and not suitable for real-time application. In a recent study, the electrolyte viscosity-determined by measuring the pressure drop across the VRB cell-was used to estimate the SOC [10]. This method demonstrated good potential for online SOC monitoring, although the quantitative relationships among SOC, viscosity, and pressure drop have to be calibrated accurately to ensure a reliable estimate. Uncertainties associated with other environmental or operating conditions also have to be ruled out.A new category of methods for SOC estimation of VRBs is the model-based observers. Firstly, a battery model is established to describe the inner physical processes and electrochemical reactions [11,12]. A typical model-based observer then links the measurable input and output to the internal state via a nonlinear state-space model [13]. This can provide a closed-loop and robust solution, which is favourable for online application, although a highly accurate battery model is a prerequisite. Different types of models have been proposed for VRBs. Numerical models [14][15][16] can describe the complicated electrochemical processes and multi-physics feature of a VRB well, but the high computing cost restricts their use in real-time application. Tang et al. developed a simplified mathematical model to describe the key processes of a VRB [17]. However, the model parameters involved had to be determined empirically based on extensive testing and knowledge of the VRB's dynamics. In contrast to mechanism-based models, equivalent circuit models (ECMs) show an expected trade-off between the computing complexity and the model accuracy. A simple ECM has been proposed for system-level integration, although this overlooks the dynamic variability of VRBs [18][19][20]. More recently, first-order [21-23] and second-order [24,25] RC models were developed to take into account the ...

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“…The chemical inertness and easy engineering of carbon is necessary for the deposition of a plenty of reachable active sites to promote the oxygen reduction and oxygen evolution reactions in case of a Li-O 2 battery system. [22] Herein, we give a comprehensive overview of carbon-based nanomaterials with engineered structures based on the design of different dimensionalities and compositions, and further summarize these newly emerged sophisticated architectures for recent development of LBs including LIBs, Li-S batteries, and Li-O 2 batteries. This review summarizes current significant works on carbon-based materials and highlights breakthrough following the advanced synthesis techniques.…”

mentioning

confidence: 99%

Structure Design and Composition Engineering of Carbon‐Based Nanomaterials for Lithium Energy Storage

Geng

Peng

et al. 2020

Advanced Energy Materials

153

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Carbon‐based nanomaterials have significantly pushed the boundary of electrochemical performance of lithium‐based batteries (LBs) thanks to their excellent conductivity, high specific surface area, controllable morphology, and intrinsic stability. Complementary to these inherent properties, various synthetic techniques have been adopted to prepare carbon‐based nanomaterials with diverse structures and different dimensionalities including 1D nanotubes and nanorods, 2D nanosheets and films, and 3D hierarchical architectures, which have been extensively applied as high‐performance electrode materials for energy storage and conversion. The present review aims to outline the structural design and composition engineering of carbon‐based nanomaterials as high‐performance electrodes of LBs including lithium‐ion batteries, lithium–sulfur batteries, and lithium–oxygen batteries. This review mainly focuses on the boosting of electrochemical performance of LBs by rational dimensional design and porous tailoring of advanced carbon‐based nanomaterials. Particular attention is also paid to integrating active materials into the carbon‐based nanomaterials, and the structure–performance relationship is also systematically discussed. The developmental trends and critical challenges in related fields are summarized, which may inspire more ideas for the design of advanced carbon‐based nanostructures with superior properties.

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Robust Design of Dual‐Phasic Carbon Cathode for Lithium–Oxygen Batteries

Cited by 35 publications

References 54 publications

Synergistic nanoarchitecture of mesoporous carbon and carbon nanotubes for lithium–oxygen batteries

Synergistic nanoarchitecture of mesoporous carbon and carbon nanotubes for lithium–oxygen batteries

Model-Based Condition Monitoring of a Vanadium Redox Flow Battery

Structure Design and Composition Engineering of Carbon‐Based Nanomaterials for Lithium Energy Storage

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