High performance columnar-like Fe2O3@carbon composite anode via yolk@shell structural design

Zheng, Zhiming; Li, Pei; Huang, Julie; Liu, Haodong; Yi, Zao; Hu, Zhongli; Zhang, Li; Chen, Huixin; Wang, Mingsheng; Peng, Dong‐Liang; Zhang, Qiaobao

doi:10.1016/j.jechem.2019.05.009

Cited by 195 publications

(64 citation statements)

References 58 publications

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“…The rapidly growing markets of renewable energy grid storage and electric vehicles have created a strong demand for high‐energy/power‐density rechargeable batteries, such as lithium‐ion batteries (LIBs). [ 1–9 ] Considering the increasing cost of lithium and the geographically uneven distribution of lithium resources, rechargeable batteries with cheap and abundant elements (e.g., sodium, potassium, magnesium, etc.) have attracted notable attention from the electrochemical energy storage field.…”

Section: Introductionmentioning

confidence: 99%

In Situ Atomic‐Scale Observation of Reversible Potassium Storage in Sb₂S₃@Carbon Nanowire Anodes

Cheng

Yao

Zhang

et al. 2020

Adv Funct Materials

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Antimony trisulfide-based materials have drawn growing attention as promising anode candidates for potassium-ion batteries (PIBs) because of their high capacity and good working potential. Despite the extensive investigations on their electrochemical properties, the fundamental reaction mechanisms of Sb 2 S 3 anodes, especially the reaction kinetics, structural changes, and phase evolutions, remain controversial or even largely unknown. Here, using in situ transmission electron microscopy, the entire potassiationdepotassiation cycles of carbon-coated Sb 2 S 3 single-crystal nanowires are tracked in real time at the atomic scale. The potassiation of Sb 2 S 3 involves multistep reactions including intercalation, conversion, and two-step alloying, and the final products are identified as cubic K 2 S and hexagonal K 3 Sb. These findings are confirmed by density functional theory calculations. Interestingly, a rocket-launching-like nanoparticle growth behavior is observed during alloying reactions, which is driven by the K + concentration gradient and release of stress. More impressively, the potassiated products (i.e., K 3 Sb and K 2 S) can transform into the original Sb 2 S 3 phase during depotassiation, indicating a reversible phase transformation process, as distinct from other metal chalcogenide based electrodes. This work reveals the detailed potassiation/depotassiation mechanisms of Sb 2 S 3-based anodes and can facilitate the analysis of the mechanisms of other metal chalcogenide anodes in PIBs.

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Section: Introductionmentioning

confidence: 99%

In Situ Atomic‐Scale Observation of Reversible Potassium Storage in Sb₂S₃@Carbon Nanowire Anodes

Cheng

Yao

Zhang

et al. 2020

Adv Funct Materials

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“…To solve these problems, plenty of efforts have been made to realize electrochemical performance improvement, including synthesizing strategies (Hua et al, 2019;Redel et al, 2019), elemental doping (Yu et al, 2019;Zheng et al, 2020b), and surface modification (Liu et al, 2019;Peng et al, 2020;Zhong et al, 2020). Many research groups have recently adopted different synthetic methods to improve the electrochemical performance of Li-rich Mn-based layered cathode materials because of the optimization of suitable morphologies and sizes, such as coprecipitation method, sol-gel, and hydrothermal method (Pimenta et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Improved Electrochemical Performance of 0.5Li2MnO3·0.5LiNi0.5Mn0.5O2 Cathode Materials for Lithium Ion Batteries Synthesized by Ionic-Liquid-Assisted Hydrothermal Method

et al. 2020

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Well-dispersed Li-rich Mn-based 0.5Li2MnO3·0.5LiNi0.5Mn0.5O2 nanoparticles with diameter ranging from 50 to 100 nm are synthesized by a hydrothermal method in the presence of N-hexyl pyridinium tetrafluoroborate ionic liquid ([HPy][BF4]). The microstructures and electrochemical performance of the prepared cathode materials are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical measurements. The XRD results show that the sample prepared by ionic-liquid-assisted hydrothermal method exhibits a typical Li-rich Mn-based pure phase and lower cation mixing. SEM and TEM images indicate that the extent of particle agglomeration of the ionic-liquid-assisted sample is lower compared to the traditional hydrothermal sample. Electrochemical test results indicate that the materials synthesized by ionic-liquid-assisted hydrothermal method exhibit better rate capability and cyclability. Besides, electrochemical impedance spectroscopy (EIS) results suggest that the charge transfer resistance of 0.5Li2MnO3· 0.5LiNi0.5Mn0.5O2 synthesized by ionic-liquid-assisted hydrothermal method is much lower, which enhances the reaction kinetics.

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“…According to Equation (3), it can be known that the value of τ can be easily adjusted by changing μ (the carrier mobility). There is reference to provide methods for increasing carrier mobility by altering the surrounding environment, such as placing organic molecules on graphene [51]. More carrier mobility contributed to the plasmonic oscillation increases, resulting in higher absorption.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Dual-Band Plasmonic Perfect Absorber Based on Graphene Metamaterials for Refractive Index Sensing Application

Liang

Chen

et al. 2019

Micromachines

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We demonstrate a dual-band plasmonic perfect absorber (PA) based on graphene metamaterials. Two absorption peaks (22.5 μm and 74.5 μm) with the maximal absorption of 99.4% and 99.9% have been achieved, respectively. We utilize this perfect absorber as a plasmonic sensor for refractive index (RI) sensing. It has the figure of merit (FOM) of 10.8 and 3.2, and sensitivities of about 5.6 and 17.2 μm/RIU, respectively. Hence, the designed dual-band PA-based RI sensor exhibits good sensing performance in the infrared regime, which offers great potential applications in various biomedical, tunable spectral detecting, environmental monitoring and medical diagnostics.

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High performance columnar-like Fe2O3@carbon composite anode via yolk@shell structural design

Cited by 195 publications

References 58 publications

In Situ Atomic‐Scale Observation of Reversible Potassium Storage in Sb₂S₃@Carbon Nanowire Anodes

In Situ Atomic‐Scale Observation of Reversible Potassium Storage in Sb₂S₃@Carbon Nanowire Anodes

Improved Electrochemical Performance of 0.5Li2MnO3·0.5LiNi0.5Mn0.5O2 Cathode Materials for Lithium Ion Batteries Synthesized by Ionic-Liquid-Assisted Hydrothermal Method

Dual-Band Plasmonic Perfect Absorber Based on Graphene Metamaterials for Refractive Index Sensing Application

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High performance columnar-like Fe2O3@carbon composite anode via yolk@shell structural design

Cited by 195 publications

References 58 publications

In Situ Atomic‐Scale Observation of Reversible Potassium Storage in Sb2S3@Carbon Nanowire Anodes

In Situ Atomic‐Scale Observation of Reversible Potassium Storage in Sb2S3@Carbon Nanowire Anodes

Improved Electrochemical Performance of 0.5Li2MnO3·0.5LiNi0.5Mn0.5O2 Cathode Materials for Lithium Ion Batteries Synthesized by Ionic-Liquid-Assisted Hydrothermal Method

Dual-Band Plasmonic Perfect Absorber Based on Graphene Metamaterials for Refractive Index Sensing Application

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In Situ Atomic‐Scale Observation of Reversible Potassium Storage in Sb₂S₃@Carbon Nanowire Anodes

In Situ Atomic‐Scale Observation of Reversible Potassium Storage in Sb₂S₃@Carbon Nanowire Anodes