Promoting the electrochemical properties of yolk-shell-structured CeO2 composites for lithium-ion batteries

Shi, Yongchao; Fu, Jipeng; Hui, Kanglong; Liu, Jie; Gao, Cong; Chang, Shuqin; Chen, Yongjin; Gao, Xiang; Gao, Tian; Xu, Ligang; Qi, Wei; Tang, Mingxue

doi:10.20517/microstructures.2021.04

Cited by 6 publications

(4 citation statements)

References 37 publications

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“…Generally, when b is close to 0.5, the process is diffusion controlled. In contrast, when b approaches unity, the process is capacitance controlled [34][35][36] . Supplementary Figure 10B shows the relationship between log (i) and log (v) and the b values corresponding to peaks 1 and 2 were 0.61 and 0.86, respectively.…”

Section: Resultsmentioning

confidence: 99%

Ultrasonication-assisted fabrication of porous ZnO@C nanoplates for lithium-ion batteries

Wang¹,

Wang²,

Wu³

et al. 2022

Microstructures

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Lithium-ion batteries have made significant commercial and academic progress in recent decades. Zinc oxide (ZnO) has been widely studied as a lithium-ion battery anode due to its high theoretical capacity of 987 mAh g-1, natural abundance, low cost, and environmental friendliness. However, ZnO suffers from poor electronic conductivity and large volume variation during the battery discharge/charge process, leading to capacity deterioration during long-term cycling. Herein, porous ZnO@C nanoplates are developed to offer short ion diffusion pathways and good conduction networks for both Li ions and electrons. The porous nanoplates provide abundant active sites for electrochemical reactions with minimized charge transfer impedance. As a result, the porous ZnO@C nanoplates deliver higher performance for lithium-ion storage compared with a bare ZnO anode. Furthermore, with the introduction of reduced graphene oxide (rGO), the ZnO@C@rGO composite anode achieves a capacity of 229.3 mAh g-1 at a high current density of 2 A g-1.

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Section: Resultsmentioning

confidence: 99%

Ultrasonication-assisted fabrication of porous ZnO@C nanoplates for lithium-ion batteries

Wang¹,

Wang²,

Wu³

et al. 2022

Microstructures

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“…Information regarding binding ligands and metal species can be obtained by solid-state magic angle spinning (MAS) nuclear magnetic resonance (NMR) analysis. 96 In NMR analysis, when nuclei of SAs under the strong magnetic region are disturbed by a weak oscillating magnetic field, a returning electromagnetic signal with a frequency characteristic of the magnetic force at the center will form. This happens near resonance if the frequency of the oscillation matches the nuclei's intrinsic frequency.…”

Section: Nuclear Magnetic Resonance Spectroscopymentioning

confidence: 99%

Metal‐organic framework‐based single‐atom electro‐/photocatalysts: Synthesis, energy applications, and opportunities

et al. 2023

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Single‐atom catalysts (SACs) have gained substantial attention because of their exceptional catalytic properties. However, the high surface energy limits their synthesis, thus creating significant challenges for further development. In the last few years, metal–organic frameworks (MOFs) have received significant consideration as ideal candidates for synthesizing SACs due to their tailorable chemistry, tunable morphologies, high porosity, and chemical/thermal stability. From this perspective, this review thoroughly summarizes the previously reported methods and possible future approaches for constructing MOF‐based (MOF‐derived‐supported and MOF‐supported) SACs. Then, MOF‐based SAC's identification techniques are briefly assessed to understand their coordination environments, local electronic structures, spatial distributions, and catalytic/electrochemical reaction mechanisms. This review systematically highlights several photocatalytic and electrocatalytic applications of MOF‐based SACs for energy conversion and storage, including hydrogen evolution reactions, oxygen evolution reactions, O2/CO2/N2 reduction reactions, fuel cells, and rechargeable batteries. Some light is also shed on the future development of this highly exciting field by highlighting the advantages and limitations of MOF‐based SACs.

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“…[2] As reported, silicon, sulfur, and phosphorus-based anode materials exhibit high specific capacity because of the conversion reaction mechanism, yet their fast charging capability and cyclic stability are still limited due to the severe volume change. [3] The fast-charging performance of metal oxides, including Li 3+x V 2 O 5 , [4] Li 4 Ti 5 O 12 , [5] Nb 16 W 5 O 55 , [6] T-Nb 2 O 5 , [7] and TiNb 2 O 7 , [8] has been effectively strengthened through regulating the crystal structure to promote the diffusion kinetics of lithium ions, whereas the lithium storage capacity needs to be improved. Thus, it is in demand to explore advanced anodes with high capacity and fast charging capability but challenging.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous‐Structured Molybdenum Diboride as a Novel and Promising Anode for Lithium‐Ion Batteries

Chen,

Liang,

Zhou

et al. 2024

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With the development of electric vehicles, exploiting anode materials with high capacity and fast charging capability is an urgent requirement for lithium‐ion batteries (LIBs). Borophene, with the merits of high capacity, high electronic conductivity and fast diffusion kinetics, holds great potential as anode for LIBs. However, it is difficult to fabricate for the intrinsic electron‐deficiency of boron atom. Herein, heterogeneous‐structured MoB2 (h‐MoB2) with amorphous shell and crystalline core, is prepared by solid phase molten salt method. As demonstrated, crystalline core can encapsulate the honeycomb borophene within two adjacent Mo atoms, and amorphous shell can accommodate more lithium ions to strengthen the lithium storage capacity and diffusion kinetics. According to theoretical calculations, the lithium adsorption energy in MoB2 is about −2.7 eV, and the lithium diffusion energy barrier in MoB2 is calculated to be 0.199 eV, guaranteeing the enhanced adsorption capability and fast diffusion kinetic behavior of Li+ ions. As a result, h‐MoB2 anode presents high capacity of 798 mAh g−1 at 0.1 A g−1, excellent rate performance of 183 mAh g−1 at 5 A g−1 and long‐term cyclic stability for 1200 cycles. This work may inspire ideas for the fabrication of borophene analogs and two‐dimensional metal borides.

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Promoting the electrochemical properties of yolk-shell-structured CeO2 composites for lithium-ion batteries

Abstract: Tang M. Promoting the electrochemical properties of yolk-shell-structured CeO 2 composites for lithium-ion batteries.

Cited by 6 publications

References 37 publications

Ultrasonication-assisted fabrication of porous ZnO@C nanoplates for lithium-ion batteries

Ultrasonication-assisted fabrication of porous ZnO@C nanoplates for lithium-ion batteries

Metal‐organic framework‐based single‐atom electro‐/photocatalysts: Synthesis, energy applications, and opportunities

Heterogeneous‐Structured Molybdenum Diboride as a Novel and Promising Anode for Lithium‐Ion Batteries

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