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Tomer VK, Dias OAT, Gouda AM, Malik R, Sain M. Advancing lithium-sulfur battery efficiency: utilizing a 2D/2D g-C 3N 4@MXene heterostructure to enhance sulfur evolution reactions and regulate polysulfides under lean electrolyte conditions. MATERIALS HORIZONS 2024; 11:3090-3103. [PMID: 38655684 DOI: 10.1039/d4mh00200h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Lithium-sulfur batteries (LSBs) show promise for achieving a high energy density of 500 W h kg-1, despite challenges such as poor cycle life and low energy efficiency due to sluggish redox kinetics of lithium polysulfides (LiPSs) and sulfur's electronic insulating nature. We present a novel 2D Ti3C2 Mxene on a 2D graphitic carbon nitride (g-C3N4) heterostructure designed to enhance LiPS conversion kinetics and adsorption capacity. In a pouch cell configuration with lean electrolyte conditions (∼5 μL mg-1), the g-C3N4-Mx/S cathode exhibited excellent rate performance, delivering ∼1061 mA h g-1 at C/8 and retaining ∼773 mA h g-1 after 190 cycles with a Coulombic efficiency (CE) of 92.7%. The battery maintained a discharge capacity of 680 mA h g-1 even at 1.25 C. It operated reliably at an elevated sulfur loading of 5.9 mg cm-2, with an initial discharge capacity of ∼900 mA h g-1 and a sustained CE of over 83% throughout 190 cycles. Postmortem XPS and EIS analyses elucidated charge-discharge cycle-induced changes, highlighting the potential of this heterostructured cathode for commercial garnet LSB development.
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Affiliation(s)
- Vijay K Tomer
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, Canada.
| | | | - Abdelaziz M Gouda
- Solar Fuels Group, Department of Chemistry, University of Toronto, Toronto, Canada
| | - Ritu Malik
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, Canada.
| | - Mohini Sain
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, Canada.
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Liu W, Chu Y, Zhou J, Chen X, Wang Y, Li J, Wu F. A Honeycomb‐Structured CoF
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‐Modified Separator Enabling High‐Performance Lithium−Sulfur Batteries. SMALL SCIENCE 2023. [DOI: 10.1002/smsc.202300006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023] Open
Affiliation(s)
- Wenxin Liu
- Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou 341000 China
| | - Yuhang Chu
- Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou 341000 China
| | - Jinwei Zhou
- School of Metallurgy and Environment Central South University Changsha 410083 China
| | - Xuanfeng Chen
- School of Metallurgy and Environment Central South University Changsha 410083 China
| | - Yujie Wang
- School of Metallurgy and Environment Central South University Changsha 410083 China
| | - Jinhui Li
- Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou 341000 China
| | - Feixiang Wu
- School of Metallurgy and Environment Central South University Changsha 410083 China
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Tomer VK, Malik R, Tjong J, Sain M. State and future implementation perspectives of porous carbon-based hybridized matrices for lithium sulfur battery. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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4
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Khosrowshahi MS, Abdol MA, Mashhadimoslem H, Khakpour E, Emrooz HBM, Sadeghzadeh S, Ghaemi A. The role of surface chemistry on CO 2 adsorption in biomass-derived porous carbons by experimental results and molecular dynamics simulations. Sci Rep 2022; 12:8917. [PMID: 35618757 PMCID: PMC9135713 DOI: 10.1038/s41598-022-12596-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/06/2022] [Indexed: 11/17/2022] Open
Abstract
Biomass-derived porous carbons have been considered one of the most effective adsorbents for CO2 capture, due to their porous structure and high specific surface area. In this study, we successfully synthesized porous carbon from celery biomass and examined the effect of external adsorption parameters including time, temperature, and pressure on CO2 uptake in experimental and molecular dynamics (MD) simulations. Furthermore, the influence of carbon's surface chemistry (carboxyl and hydroxyl functionalities) and nitrogen type on CO2 capture were investigated utilizing MD simulations. The results showed that pyridinic nitrogen has a greater tendency to adsorb CO2 than graphitic. It was found that the simultaneous presence of these two types of nitrogen has a greater effect on the CO2 sorption than the individual presence of each in the structure. It was also revealed that the addition of carboxyl groups (O=C-OH) to the carbon matrix enhances CO2 capture by about 10%. Additionally, by increasing the simulation time and the size of the simulation box, the average absolute relative error for simulation results of optimal structure declined to 16%, which is an acceptable value and makes the simulation process reliable to predict adsorption capacity under various conditions.
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Affiliation(s)
- Mobin Safarzadeh Khosrowshahi
- Nanotechnology Department, School of Advanced Technologies, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846, Iran
| | - Mohammad Ali Abdol
- Nanotechnology Department, School of Advanced Technologies, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846, Iran
| | - Hossein Mashhadimoslem
- School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846, Iran
| | - Elnaz Khakpour
- Nanotechnology Department, School of Advanced Technologies, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846, Iran
| | - Hosein Banna Motejadded Emrooz
- Nanotechnology Department, School of Advanced Technologies, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846, Iran.
| | - Sadegh Sadeghzadeh
- Nanotechnology Department, School of Advanced Technologies, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846, Iran.
| | - Ahad Ghaemi
- School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846, Iran.
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Avais M, Kumari S, Chattopadhyay S. Degradable and processable polymer monoliths with open-pore porosity for selective CO 2 and iodine adsorption. SOFT MATTER 2021; 17:6383-6393. [PMID: 34232242 DOI: 10.1039/d1sm00441g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A task-specific design of biodegradable and processable porous polymers is one of the primary requisite for their efficient day-to-day use to minimize polymer waste. Herein, a surfactant (or additive)-free method is reported for the synthesis of a processable and degradable aliphatic open-pore porous polyelectrolyte monolith for the removal of gaseous pollutants such as iodine and CO2. This is achieved via a colloidal templating method. In the 1st stage, cationic colloidal nanoparticles containing reactive amines and acrylamide groups were formed via the phase separation of hyperbranched polyaminoamides in water (sol). These cationic nanoparticles (which acted as both templates and macromers) further reacted to form a gel, which upon freeze-drying leads to the formation of a polymer monolith with an open-pore porous morphology and hierarchical porosity throughout its structure. During gelation, the shape of the monolith can be controlled using suitable templates and a similar strategy was used to prepare porous thin films. The monolith has shown excellent iodine adsorption ability (5000 mg g-1 in the vapor phase and 2663 mg g-1 in the solution phase) with good reusability and CO2 adsorption ability (60 mg g-1), with CO2/CH4 and CO2/N2 selectivities of 18.5 and 6.7, respectively. The degradability of the materials was studied in detail at different pH, confirming their easy degradability in aqueous solutions and a higher degradability at basic pH.
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Affiliation(s)
- Mohd Avais
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna, 801106, Bihar, India.
| | - Sulbha Kumari
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna, 801106, Bihar, India.
| | - Subrata Chattopadhyay
- Department of Chemistry, Indian Institute of Technology Patna, Bihta, Patna, 801106, Bihar, India.
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