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MXene-Based 2D Nanomaterials for Batteries
Published in Ram K. Gupta, Energy Applications of 2D Nanomaterials, 2022
Zhaolin Tan, Jingxuan Wei, Yang Liu, Linrui Hou, Changzhou Yuan
The contradiction between the growth of human demand for energy and the declining existing energy makes the energy problem a significant issue that affects human development. To cope with the ever-decreasing fossil energy and the following greenhouse effect and other issues, the use of renewable resources of wind, solar energy, and so forth has become urgent. The effective use of energy requires advanced electrochemical energy storage devices. Nowadays, lithium-ion batteries (LIBs) are widely used in various industries [1], as well as sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) [2,3] that are similar in mechanism and have great potential. Low-cost, green, and environmentally friendly multivalent metal (Zn, Mg, Ca, and Al)-ion batteries (MIBs) [4–6] and metal (Li and Na)-sulfur batteries (MSBs) [7] with high specific capacity and high performance are also the researching hotpot in the energy field. However, the electrochemical performance mainly depends on the inherent properties of the internal electrode materials. In general, the ideal electrode materials should have good conductivity, high specific surface area (SSA), lightweight, tunable surface wettability, and excellent electrochemical properties. Two-dimensional (2D) materials can meet the above requirements.
Hydrogen evolution performance of a Ag(I) bis(benzimidazole) coordination polymer doped carbon paste composite electrode
Published in Journal of Coordination Chemistry, 2023
Xiaoxia Kong, Qinqin Shen, Yue Lv, Tiantian Wan, Kaiyi Li, Huilu Wu
Due to the widespread use of fossil fuels, environmental pollution is becoming more and more serious, so research on green and clean energy has become the focus of attention. As a clean and non-polluting energy source, hydrogen has become an essential green resource that can be used to effectively mitigate environmental pollution [1–5]. The preparation of H2 by electrolysis of water is the greenest and most efficient method [6–10]. To enable efficient conversion of electrical energy to hydrogen energy and to improve the efficiency of hydrogen production by electrolysis of water, it is important to develop electrocatalytic materials with high activity. Studies have shown that the metallic Pt electrode material used in the HER process has a high catalytic effect and is an ideal electrode material [11–13]. However, it is expensive and scarce, and is not widely used in practical applications. Therefore, the development of more efficient and better non-precious metal HER catalysts has attracted interest [14–16].
Evaluation of fungal biomass developed from cocoa by-product as a substrate with corrosion inhibitor for carbon steel
Published in Chemical Engineering Communications, 2023
Gabriel Pereira Monteiro, Iasnaia Maria de Carvalho Tavares, Mayara Cristina Fernandes de Carvalho, Marise Silva Carvalho, Adriana Bispo Pimentel, Pedro Henrique Santos, Eduardo Valério de Barros Vilas Boas, Julieta Rangel de Oliveira, Vera Rossi Capelossi, Muhammad Bilal, Marcelo Franco
For the analysis of data, the CPE was used instead of a pure capacitor of the double electric layer, thus compensating for frequency dispersions due to phenomena on the metal surface and roughness, being considered as deviations of the ideal behavior (Azzaoui et al. (2017). The CPE impedance () can be calculated using Equation (10) (Cordeiro et al. 2018; Wang et al. 2019). where: is the magnitude of CPE; is an imaginary number (being 2 = −1), is the frequency, and α is the dispersion factor, which represents a deviation from the ideal behavior, and its value resides between 0 and 1. When the electrode is flat and has a homogeneous surface, the α value is equal to 1, making the electrode similar to a pure capacitor, whose behavior is that of an ideal electrode (Anupama et al. 2017; Hegazy et al. 2018).
Electrochemical performance of binder-free Ni(OH)2/RGO battery type electrode materials for supercapacitor
Published in International Journal of Green Energy, 2023
Yusuf Khan, Akanksha R. Urade, Amrita De Adhikari, Palash Chandra Maity, K. Ramesh, Shahid Bashir, Indranil Lahiri, S. Ramesh
The core-shell nanosphere structure of Ni(OH)2/RGO had been synthesized by an in-situ reaction. The crystallinity and surface morphology of nanostructured material was investigated by XRD/Raman and TEM analysis, respectively. Uniform core-shell morphology has been achieved by bath sonication process. Supercapacitor electrode based on Ni(OH)2/RGO nanosphere was successfully synthesized by sonication process, where RGO acts as conductive material as well as the binder. The 200°C annealed electrode offered maximum specific capacity of 513.8 Cg−1 at 10 mV/s with a cyclic stability of 83.33% after 2000 cycles. These results show that binder free hybrid supercapacitor electrode based on Ni(OH)2/RGO core-shell nanospheres has the potential to prove itself as an ideal electrode for energy storage.