A V2O5-based freestanding anode with high rate and superior cycle life for potassium storage

Xiang, Junfeng; Tian, Shuang; Jiang, Qinting; Xu, Chengrong; Gao, Peibo; Zhou, Tong; Zhou, Jin

doi:10.1016/j.coco.2022.101172

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…And the broad redox peaks demonstrated that the FeF 3 -CNFs electrode has capacitive properties. The charge storage mechanism of the FeF 3 -CNFs electrodecan be distinguished by the b-value, which can be calculated by the slope of the log(v)-log(i) according to the following formula [33]: i = a×ν b . Specifically, when b = 0.5, it indicates that the electrode material exhibits an absolute diffusioncontrolled behavior during the electrochemical process, while when b = 1, it indicates a surface-controlled pseudocapacitive behavior.…”

Section: Resultsmentioning

confidence: 99%

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3D conductive iron fluoride (III) cathode with high loading for lithium-ion batteries

Jiang¹,

Li²,

Li³

et al. 2023

J. Phys. D: Appl. Phys.

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The conversion-typed FeF3 cathode with high theoretical capacities seriously suffers from low intrinsic conductivity, sluggish reaction kinetics, and side reactions for lithium ion batteries. Especially, the composites with high loading FeF3 show poor cycling performance. Herein, an effective strategy of the nanoconfinement in the 3D conductive matrix is proposed to address the aforementioned challenges of FeF3. The FeF3 nanoparticles are only 10-50 nm due to the nanoconfined. And the loading of it is as high as 81.89%, which is the highest compared to other composites previous reported. The as-prepared FeF3-CNFs offers high reversible capacities of as high as 313 mAh g-1 at 0.1 C. Moreover, it shows enhanced cycle stability with 88.4% after 100 cycles at 1 C. The improved electrochemical performance is attributed to the 3D conductive network as well as the nanoconfinement of FeF3, which achieve a good capacitance-controlled process by accelerating electron transport while shortening the ion transport path. It is believed that this work provides an efficacious strategy to enhance the electrochemical performance of conversion-typed metal fluoride cathodes for lithium ion batteries.

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Section: Resultsmentioning

confidence: 99%

“…where v is the specific scan rate, and i is the current in the specific voltage k 1 ν and k 2 ν 1/2 , represent the contribution of capacitive-controlled and diffusioncontrolled behavior, respectively [33]. The CV curves at 0.2 mV s −1 of the capacitive current relative to the total current are shown in figure 4(c).…”

Section: Resultsmentioning

confidence: 99%

3D conductive iron fluoride (III) cathode with high loading for lithium-ion batteries

Jiang¹,

Li²,

Li³

et al. 2023

J. Phys. D: Appl. Phys.

Self Cite

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“…It had similar specific capacities in the first few cycles as commercial V 2 O 5 . However, in the following cycling processes, the capacity of commercial V 2 O 5 gradually dropped and the capacity retention was only 13% after 90 cycles, which was far below that of the micron-sized nanoporous V 2 O 5 arrays (86.72%) [45] .…”

Section: Parametermentioning

confidence: 86%

Research progress on vanadium oxides for potassium-ion batteries

Chen¹,

Wu²,

Li³

et al. 2023

J. Semicond.

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Potassium-ion batteries (PIBs) have been considered as promising candidates in the post-lithium-ion battery era. Till now, a large number of materials have been used as electrode materials for PIBs, among which vanadium oxides exhibit great potentiality. Vanadium oxides can provide multiple electron transfers during electrochemical reactions because vanadium possesses a variety of oxidation states. Meanwhile, their relatively low cost and superior material, structural, and physicochemical properties endow them with strong competitiveness. Although some inspiring research results have been achieved, many issues and challenges remain to be further addressed. Herein, we systematically summarize the research progress of vanadium oxides for PIBs. Then, feasible improvement strategies for the material properties and electrochemical performance are introduced. Finally, the existing challenges and perspectives are discussed with a view to promoting the development of vanadium oxides and accelerating their practical applications.

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Phosphorus/nitrogen co-doped hollow carbon fibers enabling high-rate potassium storage

Zhou,

Tian,

Jia

et al. 2023

Rare Met.

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A V2O5-based freestanding anode with high rate and superior cycle life for potassium storage

Cited by 6 publications

References 22 publications

3D conductive iron fluoride (III) cathode with high loading for lithium-ion batteries

3D conductive iron fluoride (III) cathode with high loading for lithium-ion batteries

Research progress on vanadium oxides for potassium-ion batteries

Phosphorus/nitrogen co-doped hollow carbon fibers enabling high-rate potassium storage

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