Keggin-type phosphomolybdate anchored paper ball-like graphene as high-capacity anode material for lithium-ion batteries

Cui, Hongyun; Li, Shuxian; Zhuo, Jinlong; Sha, Jingquan; Hu, Ming

doi:10.1016/j.solidstatesciences.2023.107132

Cited by 6 publications

(2 citation statements)

References 38 publications

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“…The reaction current density, especially the oxidation current density, increases with the increase in the amount of PMA (as shown in Figure f–h), which is in accordance with the results of the charge and discharge curves. The reduction peak at 1.02 V is assigned to the lithiation process in the MoO 6 octahedron of Keggin structure polyoxometalate, and the oxidation peak at 1.44 V is assigned to the delithiation process. , The reduction peak at 0.73 V is assigned to the lithiation and conversion reaction of MoP 2 → Li 3 P, and the oxidation peak at 0.93 V corresponds to the delithiation of Li 3 P → Li x MoP 2 . In the second CV curve, the reaction current density of redox peaks for 0.05PMA@Ti 3 C 2 T x decreases, which is attributed to the capacity loss from an irreversible side reaction and the slight structure degradation.…”

Section: Results and Discussionmentioning

confidence: 99%

Diphosphorus Center Derived from Polyoxometalate for High-Energy Lithium Storage of MXene Nanosheets

Zhong,

Wang,

2024

ACS Appl. Nano Mater.

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Two-dimensional titanium carbide (Ti 3 C 2 T x ) is a promising lithium storage anode material owing to high conductivity and larger redox sites. However, Ti 3 C 2 T x exhibits lower specific capacitance in an organic system due to the passivation effect of surface terminals and also suffers from restacking issues with long-term cycles. Herein, the material composed of a molybdenum−phosphorus compound and Ti 3 C 2 T x nanosheets is reported through thermal decomposition of polyoxometalate. The derived molybdenum phosphide provides greater free space to afford the volume change and facilitate lithium-ion transport. The unique diphosphorus centers are favorable to improving lithium storage capacity and electrochemical reaction. In addition, molybdenum oxide with abundant oxygen vacancies not only accelerates the electronic and ionic conductivity but also provides more active sites. The optimized 0.1PMA@Ti 3 C 2 T x composite delivers a superior specific capacity of over 500 mAh g −1 at 30 mA g −1 and maintains the specific capacity of 155.6 mAh g −1 at 750 mA g −1 after 400 cycles. The lithium-ion capacitor based on the 0.1PMA@Ti 3 C 2 T x anode material presents a wonderful energy density of 153.95 Wh kg −1 at a higher power density of 4696.8 W kg −1 . This work provides a strategy for high-capacity lithium storage of MXene materials and opens up an idea for the application of polyoxometalates in lithium storage.

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Section: Results and Discussionmentioning

confidence: 99%

Diphosphorus Center Derived from Polyoxometalate for High-Energy Lithium Storage of MXene Nanosheets

Zhong,

Wang,

2024

ACS Appl. Nano Mater.

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“…[19] But the problems of aggregation and irreversible restacking make it lose part of the high lithium storage space and cannot be ignored. Crumple graphene balls (CGB) with many ridges and vertices on their surface, possess high electric conductivity, interconnected and porous network, configuration advantages, [20] which can not only enhance electron transport [21] but also construct an enclosure structure to buffer or accommodate the volume expansion [22] during cycling. However, relevant reports on the CGB structure with POMCP as anode materials in LIBs are scarce, to the best our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Construction of a 12‐Phosphomolybdate‐based Coordination Polymer@Crumpled Graphene Balls Composite as Anode for Lithium Batteries

Zhuo

Cui

Zheng

et al. 2023

Chemistry An Asian Journal

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To address the poor electronic conductivity and easily dissolved in electrolyte of polyoxometalates (POMs), and considering the high electrical conductivity and configuration advantages of crumpled graphene balls (CGBs), herein, a series of POM‐based coordination polymers [Cu(pyttz)2]PMo12@CGB (n, n=1, 2, 3) were successfully synthesized, and electrochemical lithium storage performance and lithium ion diffusion kinetics were comprehensively investigated. Galvanostatic intermittent titration technique (GITT) and electrochemical impedance spectroscopy (EIS) study confirm that [Cu(pyttz)2]PMo12@CGB (n, n=1, 2, 3) integrates the advantage of high electronic conductivity of CGB and excellent Li+ migration kinetics of POMs, which greatly ameliorates the electrochemical performances of POMs, among [Cu(pyttz)2]PMo12@CGB (2) exhibits an excellent reversible specific capacity of around 941.4 mA h g−1 at 0.1 A g−1 after 150 cycles and admirable rate performance. This work will promote the development of POMCP anodes, thus fulfilling their potential in high‐performance LIBs.

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Two-dimensional correlation infrared spectroscopy study on vanadoborate anionic skeleton regulated by countercations

Meng,

Shi,

Cheng

et al. 2024

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Keggin-type phosphomolybdate anchored paper ball-like graphene as high-capacity anode material for lithium-ion batteries

Cited by 6 publications

References 38 publications

Diphosphorus Center Derived from Polyoxometalate for High-Energy Lithium Storage of MXene Nanosheets

Diphosphorus Center Derived from Polyoxometalate for High-Energy Lithium Storage of MXene Nanosheets

Construction of a 12‐Phosphomolybdate‐based Coordination Polymer@Crumpled Graphene Balls Composite as Anode for Lithium Batteries

Two-dimensional correlation infrared spectroscopy study on vanadoborate anionic skeleton regulated by countercations

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