University of Limerick
Browse
Collins_2020_Colloidal.pdf (1.63 MB)

Colloidal WSe2 nanocrystals as anodes for lithium-ion batteries

Download (1.63 MB)
journal contribution
posted on 2021-01-13, 09:44 authored by Pengshang Zhou, Gearoid A. Collins, Zeger Hens, KEVIN M. RYANKEVIN M. RYAN, HUGH GEANEYHUGH GEANEY, SHALINI SINGHSHALINI SINGH
Transition metal dichalcogenides (TMDs) are increasingly of interest in the field of lithium ion batteries due to their unique structure. However, previous preparation methods have mainly focused on their growth from substrates or by exfoliation of the bulk materials. Considering colloidal synthesis has many advantages including precision control of morphology and crystal phases, there is significant scope for exploring this avenue for active material formation. Therefore, in this work, we explore the applicability of colloidal TMDs using WSe2 nanocrystals for Li ion battery anodes. By employing colloidal hotinjection protocol, we first synthesize 2D nanosheets in 2H and 1T’ crystal phases. After detailed structural and surface characterization, we investigate the performance of these nanosheets as anode materials. We find that 2H nanosheets outperformed 1T’ nanosheets exhibiting a higher specific capacity of 498 mAh g-1 with an overall capacity retention of 83.28%. Furthermore, to explore the role of morphology on battery performance 3D interconnected nanoflowers in 2H crystal phase were also investigated as an anode material. A noteworthy specific capacity of 982 mAh g-1 after 100 cycles was exhibited by these nanoflowers. The anode materials are characterized prior to cycling and after 1, 25, and 100 charge/discharge cycles, by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), to track the effects of cycling on the material.

Funding

Evolution of Aphid Life Cycles

Directorate for Biological Sciences

Find out more...

Using the Cloud to Streamline the Development of Mobile Phone Apps

Innovate UK

Find out more...

Morpho-genetic prerequisites for sexual dimorphism of the brain and human endowments

Russian Foundation for Basic Research

Find out more...

Development of theoretical and experimental criteria for predicting the wear resistance of austenitic steels and nanostructured coatings based on a hard alloy under conditions of erosion-corrosion wear

Russian Foundation for Basic Research

Find out more...

History

Publication

Nanoscale;12 (43), pp. 22307-22316

Publisher

Royal Society of Chemistry

Note

peer-reviewed

Other Funding information

SFI, IRC, Ghent University, China Scholarship Council, EI

Rights

© 2020 Royal Society of Chemistry. Personal use of this material is permitted. Permission from Royal Society of Chemistry must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works

Language

English

Usage metrics

    University of Limerick

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC