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Atomically Dispersed MnN4 Catalysts via Environmentally Benign Aqueous Synthesis for Oxygen Reduction: Mechanistic Understanding of Activity and Stability Improvements
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Graphene nanoribbons for quantum electronics
Graphene nanoribbons (GNRs) are a family of one-dimensional (1D) materials with a graphitic lattice structure. GNRs possess high mobility and current-carrying capability, sizeable bandgap and versatile electronic properties, which make them promising candidates for quantum electronic applications. In the past 5 years, progress has been made towards atomically precise bottom-up synthesis of GNRs and heterojunctions that provide an ideal platform for functional molecular devices, as well as successful production of semiconducting GNR arrays on insulating substrates potentially useful for large-scale digital circuits. With further development, GNRs can be envisioned as a competitive candidate material in future quantum information sciences. In this Perspective, we discuss recent progress in GNR research and identify key challenges and new directions likely to develop in the near future.
Computational Analysis of Anode and Cathode Structuring Effects on Charge and Discharge in Graphite|LiNi 0.6 Mn 0.2 Co 0.2 O 2 Batteries
Structured electrodes (SEs) improve the rate capability of Lithium-ion batteries by engineering micrometer-scale electrolyte regions into the electrode, promoting rapid ionic transport. Prior research has focused on structuring one electrode (anode or cathode) with an analysis on either the charge or discharge performance. We present a holistic study using three-dimensional models to investigate the isolated effects of structuring either electrode and the combined effects of structuring both electrodes on the charge and discharge capacity of single-layer cells at 4 C and 6 C. Volumetric and gravimetric discharge energy density (Wh/L stack and Wh/kg stack ) and charge capacity (Ah/kg stack and Ah/L stack ) are evaluated for multi-layer pouch cell stacks. Pairing SE anodes with SE cathodes demonstrated improvements up to 15% in discharge Wh/kg stack and up to 33% in charge Ah/kg stack over a conventional cell; Energy required to charge per Ah/kg stack was improved by 13%–14%. SE cathodes paired with a conventional anode exhibited improvements of 0.3%–22% across all performance metrics evaluated. Conversely, pairing a SE anode with a conventional cathode demonstrated improved charge capacity up to 13% but showed a 2%–23% lower discharge energy density. The importance of aligning SEs in a cell from a performance and manufacturing perspective is also analyzed.
Materials Data on C by Materials Project
C is rhombohedral graphite-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is two-dimensional and consists of two C sheets oriented in the (0, 0, 1) direction. C is bonded in a trigonal planar geometry to three equivalent C atoms. All C–C bond lengths are 1.42 Å.
Materials Data on C by Materials Project
C is rhombohedral graphite-like structured and crystallizes in the orthorhombic Fmmm space group. The structure is two-dimensional and consists of two C sheets oriented in the (0, 0, 1) direction. C is bonded in a trigonal planar geometry to three equivalent C atoms. All C–C bond lengths are 1.42 Å.
Materials Data on C by Materials Project
C is Graphite-like structured and crystallizes in the orthorhombic Cmme space group. The structure is two-dimensional and consists of two C sheets oriented in the (0, 0, 1) direction. C is bonded in a trigonal planar geometry to three equivalent C atoms. All C–C bond lengths are 1.42 Å.
Materials Data on C by Materials Project
C is rhombohedral graphite-like structured and crystallizes in the hexagonal P6/mmm space group. The structure is two-dimensional and consists of one C sheet oriented in the (0, 0, 1) direction. C is bonded in a trigonal planar geometry to three equivalent C atoms. All C–C bond lengths are 1.42 Å.
Materials Data on C by Materials Project
C is Graphite-like structured and crystallizes in the monoclinic C2/m space group. The structure is two-dimensional and consists of one C sheet oriented in the (0, 0, 1) direction. C is bonded in a trigonal planar geometry to three equivalent C atoms. There is one shorter (1.42 Å) and two longer (1.43 Å) C–C bond length.
Materials Data on CuH3NCl by Materials Project
CuNH3Cl is Graphite-like structured and crystallizes in the cubic I2_13 space group. The structure is zero-dimensional and consists of eight CuNH3Cl clusters. Cu1+ is bonded in a linear geometry to one N3- and one Cl1- atom. The Cu–N bond length is 1.91 Å. The Cu–Cl bond length is 2.12 Å. N3- is bonded in a distorted tetrahedral geometry to one Cu1+ and three equivalent H1+ atoms. All N–H bond lengths are 1.03 Å. H1+ is bonded in a single-bond geometry to one N3- atom. Cl1- is bonded in a single-bond geometry to one Cu1+ atom.
Materials Data on C by Materials Project
C is rhombohedral graphite-like structured and crystallizes in the hexagonal P6/mmm space group. The structure is two-dimensional and consists of one C sheet oriented in the (0, 0, 1) direction. C is bonded in a trigonal planar geometry to three equivalent C atoms. All C–C bond lengths are 1.43 Å.
Materials Data on SnGe by Materials Project
GeSn is graphite-derived structured and crystallizes in the trigonal P3m1 space group. The structure is two-dimensional and consists of one GeSn sheet oriented in the (0, 0, 1) direction. Sn is bonded in a trigonal non-coplanar geometry to three equivalent Ge atoms. All Sn–Ge bond lengths are 2.63 Å. Ge is bonded in a trigonal non-coplanar geometry to three equivalent Sn atoms.
Materials Data on C by Materials Project
C is rhombohedral graphite-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is two-dimensional and consists of two C sheets oriented in the (0, 0, 1) direction. C is bonded in a trigonal planar geometry to three equivalent C atoms. All C–C bond lengths are 1.42 Å.
Materials Data on N2 by Materials Project
N2 is graphite-like structured and crystallizes in the cubic I2_13 space group. The structure is three-dimensional. N is bonded in a trigonal non-coplanar geometry to three equivalent N atoms. All N–N bond lengths are 1.41 Å.
Materials Data on C by Materials Project
C is rhombohedral graphite-like structured and crystallizes in the cubic I4_132 space group. The structure is three-dimensional. C is bonded in a trigonal planar geometry to three equivalent C atoms. All C–C bond lengths are 1.46 Å.
Materials Data on C by Materials Project
C is rhombohedral graphite-like structured and crystallizes in the hexagonal P6/mmm space group. The structure is two-dimensional and consists of one C sheet oriented in the (0, 0, 1) direction. C is bonded in a trigonal planar geometry to three equivalent C atoms. All C–C bond lengths are 1.42 Å.
Materials Data on CuS by Materials Project
CuS is graphite-derived structured and crystallizes in the trigonal P3m1 space group. The structure is two-dimensional and consists of one CuS sheet oriented in the (0, 0, 1) direction. Cu2+ is bonded in a trigonal non-coplanar geometry to three equivalent S2- atoms. All Cu–S bond lengths are 2.15 Å. S2- is bonded in a trigonal non-coplanar geometry to three equivalent Cu2+ atoms.
Production of circular polymer-glass fabric composites
Potentially automated pultrusion technique has been provided for production of curved, glass-reinforced polyimide, epoxy, and graphite reinforced structures. Specially designed apparatus has been manufactured for production of curved structures.