High-Mass Loading of Flower-like Ni-MoS2 microspheres Toward Efficient Intercalation pseudocapacitive Electrode
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 10000 cycles with 60% retention at 2 A/g. In addition to providing insightsmore »
- Authors:
-
[1];
[4];
[1]
- University of the Free State, Bloemfontein (South Africa)
- Council for Scientific and Industrial Research (CSIR), Pretoria (South Africa)
- Ames Laboratory, Ames, IA (United States)
- Ames Laboratory, and Iowa State University, Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Research Foundation of South Africa; University of the Free State; Council for Scientific and Industrial Research (CSIR)
- OSTI Identifier:
- 1925157
- Report Number(s):
- IS-J-10,999
Journal ID: ISSN 2574-0962
- Grant/Contract Number:
- AC02-07CH11358; 84415
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Energy Materials
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 4; Journal ID: ISSN 2574-0962
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; MoS2; Ni-doped MoS2; supercapacitors; specific capacitance; 3D microsphere; hydrothermal
Citation Formats
Panchu, Sarojini Jeeva, Raju, Kumar, Singh, Prashant, Johnson, Duane D., and Swart, Hendrik C. High-Mass Loading of Flower-like Ni-MoS2 microspheres Toward Efficient Intercalation pseudocapacitive Electrode. United States: N. p., 2023.
Web. doi:10.1021/acsaem.2c03257.
Panchu, Sarojini Jeeva, Raju, Kumar, Singh, Prashant, Johnson, Duane D., & Swart, Hendrik C. High-Mass Loading of Flower-like Ni-MoS2 microspheres Toward Efficient Intercalation pseudocapacitive Electrode. United States. https://doi.org/10.1021/acsaem.2c03257
Panchu, Sarojini Jeeva, Raju, Kumar, Singh, Prashant, Johnson, Duane D., and Swart, Hendrik C. Tue .
"High-Mass Loading of Flower-like Ni-MoS2 microspheres Toward Efficient Intercalation pseudocapacitive Electrode". United States. https://doi.org/10.1021/acsaem.2c03257. https://www.osti.gov/servlets/purl/1925157.
@article{osti_1925157,
title = {High-Mass Loading of Flower-like Ni-MoS2 microspheres Toward Efficient Intercalation pseudocapacitive Electrode},
author = {Panchu, Sarojini Jeeva and Raju, Kumar and Singh, Prashant and Johnson, Duane D. and Swart, Hendrik C.},
abstractNote = {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 10000 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.},
doi = {10.1021/acsaem.2c03257},
journal = {ACS Applied Energy Materials},
number = 4,
volume = 6,
place = {United States},
year = {Tue Feb 07 00:00:00 EST 2023},
month = {Tue Feb 07 00:00:00 EST 2023}
}
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