High Mass Loading of Flowerlike Ni-MoS2 Microspheres toward Efficient Intercalation Pseudocapacitive Electrodes

dc.contributor.author Panchu, Sarojini Jeeva
dc.contributor.author Raju, Kumar
dc.contributor.author Singh, Prashant
dc.contributor.author Johnson, Duane
dc.contributor.author Swart, Hendrik C.
dc.contributor.department Ames National Laboratory
dc.contributor.department Materials Science and Engineering
dc.date.accessioned 2023-05-25T19:48:50Z
dc.date.available 2023-05-25T19:48:50Z
dc.date.issued 2023-02-07
dc.description.abstract This work reports the exploration of intercalation pseudocapacitance in a thicker electrode of flowerlike Ni-doped MoS2 microspheres that features a mass loading of ∼10 mg/cm2 without sacrificing the gravimetric capacitance (∼425 F/g at 5 mV/s). Integration of Ni atoms into MoS2 microspheres not only stabilized the structural integrity but also ameliorated the rapid intercalation and deintercalation of electrolyte ions even at a commercial-level mass loading. The energy instability by Ni doping significantly changed the local bonding behavior and the overall electronic structure of MoS2, facilitating the breaking of the MoS2 layer and generation of more active edge sites, which are responsible for faster reaction kinetics. The experiments attribute the overall capacitance enhancement in (Mo-Ni)S2 to the increased rate of electrolyte ion insertion and extraction, which is confirmed by b-values close to 0.5, at different potentials, indicating that the current response predominantly depends on the diffusive mechanism for both MoS2 and Ni-MoS2 thicker electrodes. The symmetric device constructed with Ni-MoS2 microspheres exhibited a capacitance value of 101 F/g in 1 mV/s, for which the energy density is 9 Wh/kg, as well as attained an outstanding cycling stability of 10 000 cycles with 60% retention at 2 A/g. In addition to providing insights into the development of 2D TMDs, this work explores the design of robust and highly efficient intercalation electrode material for electrochemical energy storage devices.
dc.description.comments This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication as Panchu, Sarojini Jeeva, Kumar Raju, Prashant Singh, Duane D. Johnson, and Hendrik C. Swart. "High Mass Loading of Flowerlike Ni-MoS2 Microspheres toward Efficient Intercalation Pseudocapacitive Electrodes." ACS Applied Energy Materials 6, no. 4 (2023): 2187-2198. Copyright 2023 American Chemical Society after peer review. To access the final edited and published work see DOI: 10.1021/acsaem.2c03257. Posted with permission. DOE Contract Number(s): AC02-07CH11358; 84415
dc.identifier.other 1925157
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/erLKllDv
dc.language.iso en
dc.publisher Iowa State University Digital Repository, Ames IA (United States)
dc.relation.ispartofseries IS-J 10999
dc.source.uri https://doi.org/10.1021/acsaem.2c03257 *
dc.subject.disciplines DegreeDisciplines::Physical Sciences and Mathematics::Chemistry::Materials Chemistry
dc.subject.keywords MoS2
dc.subject.keywords Ni-doped MoS2
dc.subject.keywords supercapacitors
dc.subject.keywords specific capacitance
dc.subject.keywords 3D microsphere
dc.subject.keywords hydrothermal
dc.title High Mass Loading of Flowerlike Ni-MoS2 Microspheres toward Efficient Intercalation Pseudocapacitive Electrodes
dc.type Article
dspace.entity.type Publication
relation.isAuthorOfPublication ed24845f-863f-4613-9f76-130602a21b4a
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
relation.isOrgUnitOfPublication bf9f7e3e-25bd-44d3-b49c-ed98372dee5e
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