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Redox Chemistry of the Subphases of α-CsPbI2Br and β-CsPbI2Br: Theory Reveals New Potential for Photostability
The logic in the design of a halide-mixed APb(I 1-x Br x ) 3 perovskite is quite straightforward: to combine the superior photovoltaic qualities of iodine-based perovskites with the increased stability of bromine-based perovskites. However, even small amounts of Br doped into the iodine-based materials leads to some instability. In the present report, using first-principles computations, we analyzed a wide variety of α-CsPbI 2 Br and β-CsPbI 2 Br phases, compared their mixing enthalpies, explored their oxidative properties, and calculated their hole-coupled and hole-free charged Frenkel defect (CFD) formations by considering all possible channels of oxidation. Nanoinclusions of bromine-rich phases in α-CsPbI 2 Br were shown to destabilize the material by inducing lattice strain, making it more susceptible to oxidation. The uniformly mixed phase of α-CsPbI 2 Br was shown to be highly susceptible towards a phase transformation into β-CsPbI 2 Br when halide interstitial or halide vacancy defects were introduced into the lattice. The rotation of PbI 4 Br 2 octahedra in α-CsPbI2Br allows it either to transform into a highly unstable apical β-CsPbI 2 Br, which may phase-segregate and is susceptible to CFD, or to phase-transform into equatorial β-CsPbI 2 Br, which is resilient against the deleterious effects of hole oxidation (energies of oxidation >0 eV) and demixing (energy of mixing <0 eV). Thus, the selective preparation of equatorial β-CsPbI 2 Br offers an opportunity to obtain a mixed perovskite material with enhanced photostability and an intermediate bandgap between its constituent perovskites.
Replication Data for: Dynamical Change of Valence States and Structure in NiCu 3 Nanoparticles during Redox Cycling
The data underlying this published work have been made publicly available in this repository as part of the IMASC Data Management Plan. This work was supported as part of the Integrated Mesoscale Architectures for Sustainable Catalysis (IMASC), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award # DE-SC0012573.
Development of high-efficient ion selective membrane separator for lithium polysulfide redox flow batteries
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Redox-active oxide materials for thermal energy storage
Thermochemical storage materials having the general formula A x A′ 1-x B y B′ 1-y O 3-δ , where A=La, Sr, K, Ca, Ba, Y and B=Mn, Fe, Co, Ti, Ni, Cu, Zr, Al, Y, Cr, V, Nb, Mo, are disclosed. These materials have improved thermal storage energy density and reaction kinetics compared to previous materials. Concentrating solar power thermochemical systems and methods capable of storing heat energy by using these thermochemical storage materials are also disclosed.
Transgenic plants with engineered redox sensitive modulation of photosynthetic antenna complex pigments and methods for making the same
Embodiments of the present invention provide for a transgenic plan, methods of making and DNA constructs for use in the transgenic plant which transgenic plant is capable of modulating its photosynthetic antenna complex composition in response to increases or decreases in light intensity by modulation of the ratio of chlorophyll a to chlorophyll b such that there is an increase in the Chl a/b ratio at high light intensity and a decrease in the Chl a/b ratio at low light intensity versus wild-type plants grown in the same conditions.
Stable Isotope Probing Reveals Microbial Responses to Changing Redox Conditions in a Tropical Forest Soil
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Redox-active oxide materials for thermal energy storage
Thermochemical storage materials having the general formula AxA′1-xByB′1-yO3-δ, where A=La, Sr, K, Ca, Ba, Y and B=Mn, Fe, Co, Ti, Ni, Cu, Zr, Al, Y, Cr, V, Nb, Mo, are disclosed. These materials have improved thermal storage energy density and reaction kinetics compared to previous materials. Concentrating solar power thermochemical systems and methods capable of storing heat energy by using these thermochemical storage materials are also disclosed.
Materials for high-performance aqueous organic redox flow batteries
Quinones and related compounds for use in flow batteries are provided. Many of these compounds are found to mitigate the effects of crossover in a flow battery. Other structure for improving battery performance is provided.
In-Operando Investigation on Sequential Stages for Redox-Triggered Phase Transformation of Natural Hematite Particles
Presented by NETL at TMS 2020, 02/20
Desymmetrized hexasubstituted [3]radialene anions as aqueous organic catholytes for redox flow batteries.
Abstract not provided.
Higher Voltage Iron Bipyridines for Non-Aqueous Redox Flow Batteries.
Abstract not provided.
Tunable Iron(II) Bipyridine Complexes for Non-Aqueous Redox Flow Batteries.
Abstract not provided.
Anionic redox induced anomalous structural transition in Ni-rich cathodes
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Iron redox analysis of silicate-based minerals and glasses using synchrotron X-ray absorption and laboratory X-ray emission spectroscopy
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Transgenic plants with engineered redox sensitive modulation of photosynthetic antenna complex pigments and methods for making the same
Embodiments of the present invention provide for a transgenic plan, methods of making and DNA constructs for use in the transgenic plant which transgenic plant is capable of modulating its photosynthetic antenna complex composition in response to increases or decreases in light intensity by modulation of the ratio of chlorophyll a to chlorophyll b such that there is an increase in the Chl a/b ratio at high light intensity and a decrease in the Chl a/b ratio at low light intensity versus wild-type plants grown in the same conditions.
Synthesis and durability of benzophenone derivatives as carriers in nonaqueous redox flow batteries
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