Anion vacancies regulating endows MoSSe with fast and stable potassium ion storage
Date
2019
Authors
He, H.
Huang, D.
Gan, Q.
Hao, J.
Liu, S.
Wu, Z.
Pang, W.K.
Johannessen, B.
Tang, Y.
Luo, J.L.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
ACS Nano, 2019; 13(10):11843-11852
Statement of Responsibility
Hanna He, Dan Huang, Qingmeng Gan, Junnan Hao, Sailin Liu, Zhibin Wu ... et al.
Conference Name
Abstract
Vacancy engineering is a promising approach for optimizing the energy storage performance of transition metal dichalcogenides (TMDs) due to the unique properties of vacancies in manipulating the electronic structure and active sites. Nevertheless, achieving effective introduction of anion vacancies with adjustable vacancy concentration on a large scale is still a big challenge. Herein, MoS2(1-x)Se2x alloys with anion vacancies introduced in situ have been achieved by a simple alloying reaction, and the vacancy concentration has been optimized through adjusting the chemical composition. Experimental and density functional theory calculation results suggest that the anion vacancies in MoS2(1-x)Se2x alloys could enhance the electronic conductivity, induce more active sites, and alleviate structural variation in the alloys during the potassium storage process. When applied as potassium ion battery anodes, the most optimized vacancy-rich MoSSe alloy delivered high reversible capacities of 517.4 and 362.4 mAh g-1 at 100 and 1000 mA g-1, respectively. Moreover, a reversible capacity of 220.5 mAh g-1 could be maintained at 2000 mA g-1 after 1000 cycles. This work demonstrates a practical approach to modifying the electronic and defect properties of TMDs, providing an effective strategy for constructing advanced electrode materials for battery systems.
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Corrected by: Correction to “Anion Vacancies Regulating Endows MoSSe with Fast and Stable Potassium Ion Storage”,ACS Nano 2024, 18, 50, 34421–34422. https://doi.org/10.1021/acsnano.4c16279. The authors regret that the affiliation recorded for Bernt Johannessen is incomplete. The full affiliation should be ‘Australian Synchrotron, ANSTO, Clayton VIC 3168, Australia’. The change is reflected in the affiliations of this Correction. The authors would like to apologize for any inconvenience caused. The correction does not in any way affect results or conclusions of the article.
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© 2019 American Chemical Society