In-situ N-doped MnCO3 anode material via one-step solvothermal synthesis: Doping mechanisms and enhanced electrochemical performances

Liu, Mengjiao; Wang, Qin; Liu, Zhiyao; Zhao, Yan; Lai, Xin; Bi, Jian; Gao, Daojiang

doi:10.1016/j.cej.2019.123161

Cited by 43 publications

(31 citation statements)

References 67 publications

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“…Yao et al reported an electrodeposited MnCO 3 as a high-performance electrode material for supercapacitors (Yao et al, 2021). Liu et al reported in situ N-doped MnCO 3 anode material via one-step solvothermal for lithium-ion batteries (LIBs) (Liu et al, 2020). Zhao et al reported that when MnCO 3 -RGO composite anode materials are used as anode material, they deliver a large capacity of 873 mAh g −1 even after 400 cycles at 1 °C (Zhao et al, 2019b).…”

Section: Introductionmentioning

confidence: 99%

Phase transformation mechanism of MnCO3 as cathode materials for aqueous zinc-ion batteries

et al. 2022

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Aqueous rechargeable zinc-ion batteries (ZIBs) have been given more and more attention because of their high specific capacity, high safety, and low cost. The reasonable design of Mn-based cathode materials is an effective way to improve the performance of ZIBs. Herein, a square block MnCO3 electrode material is synthesized on the surface of carbon cloth by a one-step hydrothermal method. The phase transition of MnCO3 was accompanied by the continuous increase of specific capacity, and finally maintained good cycle stability in the charge–discharge process. The maximum specific capacity of MnCO3 electrode material can reach 83.62 mAh g−1 at 1 A g−1. The retention rate of the capacity can reach 85.24% after 1,500 cycles compared with the stable capacity (the capacity is 61.44 mAh g−1 under the 270th cycle). Ex situ characterization indicates that the initial MnCO3 gradually transformed into MnO2 accompanied by the embedding and stripping of H+ and Zn2+ in charge and discharge. When MnCO3 is no longer transformed into MnO2, the cycle tends to be stable. The phase transformation of MnCO3 could provide a new research idea for improving the performance of electrode materials for energy devices.

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Section: Introductionmentioning

confidence: 99%

Phase transformation mechanism of MnCO3 as cathode materials for aqueous zinc-ion batteries

et al. 2022

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“…[403] To further enhance the energy density and power density of LIBs, a great number of researches have been dedicated to comprehending the fundamental physical and chemical properties and exploring the optimum combination of the building blocks including cathodes, anodes, electrolytes, and separators, among which the electrodes are the most investigated units since they serve as electrochemical reactive sites. [404][405][406] In brief, the working mechanism of a LIB could be ascribed as: in the charging process, electrons from the cathode flow to the anode along the external circuit; lithium ions (Li + ) are extracted from the cathode simultaneously, then permeate the porous separator and intercalate into the anode via the conductive electrolyte. During discharging, the opposite reaction takes place.…”

Section: Lithium-ion Batteriesmentioning

confidence: 99%

Metal‐Organic Frameworks Nanocomposites with Different Dimensionalities for Energy Conversion and Storage

Bai

Liu

Shan

et al. 2021

Advanced Energy Materials

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129

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Metal‐organic frameworks (MOFs) have emerged as a promising material with unique features such as diverse composition, high porosity, tunable pore structure, and versatile functionality. These characteristics have attracted significant research interest in photochemical and electrochemical energy conversion and storage (ECS). However, the utilization of pristine MOFs in ECS is still hindered by their limited conductivity and functionality. Recently, the integration of MOFs with functional materials has been studied intensively to surmount the deficiencies of pristine MOFs while maintaining their original advantages. The MOFs act as the essential active species, or as supports to accommodate and stabilize these materials. The incorporation can deliver synergistic effects and enhance the properties of MOFs, thus greatly improving their efficiency and stability in ECS. The favorable nanostructures of MOF composites with different dimensionalities including 0D, 1D, 2D, and 3D can further enrich their structural diversity. Their advanced nanostructures contribute greatly to the enhanced structural robustness, exposure of active sites, and mass/electron transport, which are promising for practical ECS. In this review, recent progress in the rational design of MOF composites with different dimensionalities is summarized. The extensive applications of MOF composites for ECS systems are also discussed for elucidating their advantages, challenges, and prospects.

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“…From the aspect of atomic scale, the doping of impurity atoms can regulate the intrinsic properties of active materials, possibly enhancing the electrochemical performance. , Previous works indicated that the doping of impurity atoms would induce local structural changes (such as the variation of bond lengths and lattice constants), and the changes potentially decrease the diffusion barrier of Li + . Moreover, doping is capable of boosting carrier concentrations and conductivity .…”

Section: Introductionmentioning

confidence: 99%

Aerogel Constructed by Ultrasmall Mn-Doped Silica Nanoparticles for Superior Lithium-Ion Storage

Wang

Mao

2021

ACS Appl. Mater. Interfaces

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The high internal stress during (de)lithiation, poor ionic/electronic conductivity, and relatively low specific capacity are the three critical issues for the applications of silica (SiO2) anodes. Herein, a high-performance SiO2 anode is designed from the microscale to the atomic scale, and for the first time, an aerogel constructed by the graphene and manganese atom (Mn)-doped ultrasmall SiO2 nanoparticles (around 50 nm) is proposed to overcome the three issues. From the aspect of microscale, the ultrasmall SiO2 nanoparticles and the porous feature of aerogel improve the structural stability during (de)lithiation and the lithium-ion diffusion kinetics. From the aspect of atomic scale, the doping of Mn introduces the impurity level, expands the coordination environment, and enhances the adsorption for Li+, boosting the ionic/electronic conductivity and the amount of the Li+ intercalation. Therefore, the anode ranks among the best SiO x (0 < x ≤ 2) anodes. For example, the capacity is almost constant after 2000 cycles, and the specific capacities are around 1800, 1600, and 1300 mAh/g at 0.5, 1, and 3 A/g, respectively. Moreover, the reinforced reasons are revealed based on the density functional theory simulations and experiments.

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In-situ N-doped MnCO3 anode material via one-step solvothermal synthesis: Doping mechanisms and enhanced electrochemical performances

Cited by 43 publications

References 67 publications

Phase transformation mechanism of MnCO3 as cathode materials for aqueous zinc-ion batteries

Phase transformation mechanism of MnCO3 as cathode materials for aqueous zinc-ion batteries

Metal‐Organic Frameworks Nanocomposites with Different Dimensionalities for Energy Conversion and Storage

Aerogel Constructed by Ultrasmall Mn-Doped Silica Nanoparticles for Superior Lithium-Ion Storage

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