Electrochemical energy storage part I: development, basic principle and conventional systems

Bhattacharjee, Udita; Ghosh, Shuvajit; Bhar, Madhushri; Martha, Surendra K.

doi:10.1016/b978-0-323-90521-3.00001-6

Cited by 11 publications

(5 citation statements)

References 51 publications

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“…Supercapacitors are a class of energy storage devices having quicker charge-discharge with longer cycle life and superior power density, it consists of two current collectors as electrodes, in which nanomaterials can be employed as the active material. Among two common charge storage mechanisms of supercapacitors such as electrostatic double-layer capacitance and electrochemical pseudocapacitance, the latter is preferred in our work on account of their higher capacitance and superior energy density over the former [3]. Among various nanomaterials, metal oxides, MXene, and transition metal dichalcogenides (TMDCs) exhibit pseudocapacitive behaviour due to the presence of various oxidation states of metal ions in the compound, which can undergo redox reactions upon the charging and discharging process.…”

Section: Introductionmentioning

confidence: 99%

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Philip,

Kumar

2024

Nano Ex.

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Owing to its exceptional structural, electrical, and optical features, Molybdenum disulphide (MoS2), a two-dimensional (2D) layered material with tuneable bandgap, finds its application in electrochemical supercapacitors for superior energy and power density. Because of their low toxicity and long-term energy storage, the development of MoS2-based supercapacitors is inevitable. The study of solvent effects on the electrochemical performance of a few layered MoS2 using FTO substrates is done for the first time to the best of our knowledge. Exfoliating bulk MoS2 powder in different solvents with variable surface tensions such as Ethanol, Ethylene Glycol (EG), Dimethylformamide (DMF), and Dimethyl Sulfoxide (DMSO) results in the formation of few-layered MoS2 structures. The sample's structural, optical, and electrochemical behaviours are investigated using X-ray diffraction (XRD), atomic force microscopy (AFM), UV spectroscopy, Fourier transform infrared (FTIR), cyclic-voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). XRD confirms the formation of a 2D MoS2 film with (002) planes and the optical investigation revealed the variation of layer dependant bandgap with solvents. We observe both faradaic and non-faradaic charge storage mechanisms in the samples and demonstrate a superior pseudocapacitive behaviour for MoS2 in DMF with a maximum specific capacitance of 34.25 F/g at a current density of 1 A/g.

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Section: Introductionmentioning

confidence: 99%

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Philip,

Kumar

2024

Nano Ex.

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“…The growing worldwide need for energy coupled with the depletion of the remaining reserves of fossil fuels has sparked numerous efforts toward developing sustainable energy alternatives. Electrical energy storage (EES) has been identified as one of the most promising technologies to produce fuels in a clean, efficient, and cost-effective manner. − Due to their long life span, excellent cycling stability, and environmental friendliness, lithium-ion batteries (LIBs) are one of the EES technologies that are being developed to fulfill the increasing demand for sustainable energy. However, an in-depth investigation has demonstrated that electrode materials play a crucial role in the performance of lithium-based batteries.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Optical and Energetic Properties of a Co(II)-Based Mixed Ligand MOF

Abid,

Mjejri,

Jaballi

et al. 2024

Inorg. Chem.

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Due to their remarkable properties, including remarkable porosity and extensive surface area, metal−organic frameworks (MOFs) are being investigated for various applications. Herein, we report the first Co(II)-based mixed ligand MOF, formulated Co 4 (HTrz) 2 (D-cam) 2.5 (μ−OH) 3 . Its 3D structure framework is composed of helical chains {[Co 4 (μ 3 -HTrz) 4 ] 8+ } n connected by D-camphorate ligand building blocks and featured as an extended structure in an AB−AB fashion. The investigated compound displays a wide absorption range across the visible spectrum, characterized by an optical gap energy of 3.7 eV, indicating its semiconducting nature and efficient sunlight absorption capabilities across various wavelengths. The electrochemical performance demonstrated an excellent reversibility, cyclability, structural stability, as well as a specific capacity of up to 100 cycles at a scan rate of 0.1 mV•s −1 and a current density of 50 mA•g −1 . Thus, it showcases its ability to retain the capacity over numerous charge−discharge cycles. Additionally, the investigated sample displayed an impressive rate capability during the Liion charge/discharge process. Therefore, the material's remarkable electrochemical properties can be ascribed to the synergistic effects of its large specific surface area of 348.294 m 2 •g −1 and well-defined pore size distribution of 20.448 Å, making it a promising candidate for high-performance Li-ion batteries.

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“…Lithium-ion batteries (LIBs) are the current state-of-the-art battery technology for high-energy power sources. , Burgeoning demands to increase energy density beyond 300 Wh kg –1 and the limited resources of cobalt have driven the research interests to Co-less (<20%)–Ni-rich (>60%) layered oxide cathodes. ,− To achieve the target of 300 Wh kg –1 at the pack level, LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811) is projected as the suitable cathode material due to its ∼200 mAh g –1 capacity at an average voltage of ∼3.8 V . Nevertheless, the lack of long-term cyclability originating from the surface and bulk structural instabilities hinders the commercialization of NMC811. , …”

Section: Introductionmentioning

confidence: 99%

Transforming Residual Lithium Compounds on the LiNi_0.8Mn_0.1Co_0.1O₂ Surface into a Li–Mn–P–O-Based Composite Coating for Multifaceted Improvements

Dutta,

Ghosh,

Martha

2024

ACS Appl. Mater. Interfaces

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LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811) is the most promising cathode material for next-generation lithium-ion batteries (LIBs). However, the chemical instability of the material during air exposure leads to the formation of residual lithium compounds (RLCs: LiOH and Li 2 CO 3 ) on the surface and inhibits its practical application. Here, we propose a chemical conversion process to remove RLCs by utilizing them and forming a hybrid coating layer on the surface of NMC811 that contains Li 3 PO 4 , LiMn 2 O 4 , and LiMnPO 4 phases, yielding multifaceted benefits. The hybrid layer on the surface protects the material from undesirable side reactions. It improves the cycle life of NMC811 by retaining 80% of its initial capacity after 300 cycles and 66% after 500 cycles at a 0.5C rate in the operating voltage of 3.0−4.3 V. The process enables high-voltage (4.7 V vs Li + /Li) operation by stabilizing the electrode− electrolyte interface, reduces the degree of cationic disorder and the voltage polarization for phase transitions, improves Coulombic efficiency and ion diffusion kinetics, and minimizes the secondary particle crack formation over long-term cycling. In fact, the coating reduces the detrimental effects of RLCs, leaves the surface for better Li + transport, and hence significantly improves the electrochemical performance of NMC811.

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Electrochemical energy storage part I: development, basic principle and conventional systems

Cited by 11 publications

References 51 publications

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Exploring the Optical and Energetic Properties of a Co(II)-Based Mixed Ligand MOF

Transforming Residual Lithium Compounds on the LiNi_0.8Mn_0.1Co_0.1O₂ Surface into a Li–Mn–P–O-Based Composite Coating for Multifaceted Improvements

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Electrochemical energy storage part I: development, basic principle and conventional systems

Cited by 11 publications

References 51 publications

Solvent effects on the electrochemical performance of few layered MoS2 electrodes fabricated using FTO substrates

Solvent effects on the electrochemical performance of few layered MoS2 electrodes fabricated using FTO substrates

Exploring the Optical and Energetic Properties of a Co(II)-Based Mixed Ligand MOF

Transforming Residual Lithium Compounds on the LiNi0.8Mn0.1Co0.1O2 Surface into a Li–Mn–P–O-Based Composite Coating for Multifaceted Improvements

Contact Info

Product

Resources

About

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Solvent effects on the electrochemical performance of few layered MoS₂ electrodes fabricated using FTO substrates

Transforming Residual Lithium Compounds on the LiNi_0.8Mn_0.1Co_0.1O₂ Surface into a Li–Mn–P–O-Based Composite Coating for Multifaceted Improvements