What are the applications of biopolymers for sustainable batteries?5 answersBiopolymers have various applications in sustainable batteries. Lignocellulose, a biopolymer derived from lignin and cellulose, can be used as electrodes, separators, binders, and electrolytes in supercapacitors and battery applications. Polysaccharide-based compounds and materials, another type of biopolymer, can be used as electrode binders, separators, and gel/solid polymer electrolytes in batteries. Biopolymer membranes, also known as biopolymer electrolytes, are being researched for their potential use in batteries, particularly in proton battery applications. Biomaterials derived from biowastes, which are biopolymers with sustainability and environmentally friendly properties, can be used as S hosts, separator materials, and biopolymer binders in metal-sulfur batteries. Additionally, bio-polymers can be utilized as polymer hosts in the preparation of electrolyte frameworks for energy storage devices such as supercapacitors, batteries, fuel cells, and solar cells.
Are there studies on Mg-based transition metals studied for electrochemical hydrogen storage?5 answersYes, there are studies on Mg-based transition metals for electrochemical hydrogen storage. One study demonstrated that mechanochemical exfoliation of magnesium diboride produced ultrathin MgB2 nanosheets with a high hydrogen capacity of 5.1 wt%. Another study analyzed the hydrogen storage properties of cellulose and chitosan doped with magnesium, titanium, and niobium, and found that niobium-doped cellulose and chitosan showed the most favorable hydrogen storage capacity. Additionally, a study reported a magnesium composite containing trace amounts of nickel catalyst (Ni-Mg) that exhibited a hydrogen storage capacity of 7.5 wt% and rapid absorption/desorption kinetics. Furthermore, a review paper discussed the modification of Mg-based hydrogen storage alloys using transition metals as catalysts, including the use of graphene as a support for these catalysts. These studies provide insights into the development of efficient Mg-based transition metal materials for electrochemical hydrogen storage.
Are there studies on Mg-based binary alloys studied for electrochemical hydrogen storage?5 answersStudies have been conducted on Mg-based binary alloys for electrochemical hydrogen storage. Yu et al. investigated the use of Mg90Ce5Y5 with various amounts of Dy2O3 catalyst and found that the catalyzed samples had better kinetics performance compared to the uncatalyzed ones. Bu et al. studied Gd5Mg95-xNix (x = 5,10,15) alloys and found that the kinetic performance significantly improved with increasing nickel content. Muzammil discussed the evolution of metallurgical processing of Mg and MgH2 for hydrogen storage and mentioned the use of different processing routes, including mechanical alloying and severe plastic deformation, to improve the microstructure and kinetics of Mg-based alloys. Therefore, these studies demonstrate the investigation of Mg-based binary alloys for electrochemical hydrogen storage.
Mg-based binary alloys for electrochemical hydrogen storage?5 answersMg-based binary alloys have been extensively studied for electrochemical hydrogen storage. These alloys possess high capacity, good electrochemical properties, and moderate hydrogen equilibrium pressure, making them attractive for high-performance Ni-MH batteries. The use of rare earth-Mg-Ni-based (R-Mg-Ni-based) alloys with superlattice structures has shown promise in improving the thermodynamic and kinetic properties of these alloys. Various processing routes, such as mechanical alloying and severe plastic deformation, have been explored to optimize the microstructure and enhance the hydrogen storage performance of Mg-based alloys. Additionally, the addition of catalysts, such as Dy2O3, has been found to improve the kinetics of hydrogen absorption and desorption in Mg-based alloys. Overall, Mg-based binary alloys show potential for electrochemical hydrogen storage, and further research is needed to develop alloys with higher energy density, longer cycle life, better kinetics, and lower cost.
Is TM-Mg based alloys studied for electrochemical hydrogen storage?2 answersTM-Mg based alloys have been studied for electrochemical hydrogen storage. DFT calculations were performed to investigate the application of TM-encapsulated Mg12O12 nano-cages (TM = Mn, Fe, and Co) as hydrogen storage materials. The results showed that MnMg12O12 and FeMg12O12 nano-cages can carry up to twelve and nine H2 molecules, respectively, and may be promising materials for hydrogen storage applications. In addition, porous carbon-based materials loaded with Fe, Co, and Cu nanoparticles were fabricated to improve the hydrogen storage performances of Mg-Al-Y alloy. The catalysts [email protected] (Tm = Fe, Co, Cu) showed great catalytic influence on the hydrogen storage performances of Mg-Al-Y alloy. Furthermore, Mg–Ce–Y–Ni + 10 wt % M (M = Zr, Ti, V) composites were prepared and their hydrogen storage properties were investigated. The results showed that Zr and V elements are more efficient in reducing the thermodynamic stability of RE-Mg-Ni hydrogen storage alloys.
What are the most promising solid electrolytes for Mg batteries?5 answersPolymer electrolytes are the most promising solid electrolytes for magnesium (Mg) batteries. Dual-salt modification of polyvinylidene fluoride (PVDF)-based polymer electrolytes, such as the introduction of Lithium bis(trifluoromethanesulphonyl)imide (LiTFSI), lithium bis(oxalate)borate (LiBOB), and Li6.4La3Zr1.4Ta0.6O12 (LLZTO), enhances lithium ion transport channels and improves the ionic conductivity at room temperature. Additionally, the use of a gel polymer electrolyte (GPE) comprising poly(vinylidene fluoride-co-hexafluoro propylene) (PVDF-co-HFP) dissolved in a LiPF6-LiNO3 dual-salt solution with multiple solvents has shown higher ionic conductivity and Li+ transference number compared to liquid electrolytes. These polymer electrolytes exhibit excellent oxidation resistance, interfacial compatibility, and cycling stability, making them suitable for Mg batteries. The strategy of adding organic plasticizer, such as ethylene carbonate (EC), to halogen-free electrolytes based on Mg(NO3)2 in acetonitrile (ACN) and tetraethylene glycol dimethyl ether (G4), also enhances the ionic conductivity and improves the electrochemical performance of Mg-sulfur batteries.