ORCID Profile
0000-0003-0666-8063
Current Organisations
University of Alberta
,
E O Lawrence Berkeley National Laboratory
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Publisher: American Association for the Advancement of Science (AAAS)
Date: 13-07-2012
Abstract: Understanding the sources and the formation mechanisms of organic carbon compounds on Mars has implications for our understanding of the martian carbon cycle. Steele et al. (p. 212 , published online 24 May) present measurements of organic material in 11 martian meteorites, including the Tissint meteorite, which fell in the Moroccan desert in July 2011. Ten of the meteorites contain complex hydrocarbons encased within igneous minerals. The results imply that the organics formed as the magma melt crystallized and are thus of abiotic origin.
Publisher: Springer Science and Business Media LLC
Date: 20-04-2021
DOI: 10.1038/S41467-021-22527-Z
Abstract: The dependence on lithium-ion batteries leads to a pressing demand for advanced cathode materials. We demonstrate a new concept of layered-rocksalt intergrown structure that harnesses the combined figures of merit from each phase, including high capacity of layered and rocksalt phases, good kinetics of layered oxide and structural advantage of rocksalt. Based on this concept, lithium nickel ruthenium oxide of a main layered structure ( R $$\\bar{3}$$ 3 ¯ m ) with intergrown rocksalt ( Fm $$\\bar{3}$$ 3 ¯ m ) is developed, which delivers a high capacity with good rate performance. The interwoven rocksalt structure successfully prevents the anisotropic structural change that is typical for layered oxide, enabling a nearly zero-strain operation upon high-capacity cycling. Furthermore, a design principle is successfully extrapolated and experimentally verified in a series of compositions. Here, we show the success of such layered-rocksalt intergrown structure exemplifies a new battery electrode design concept and opens up a vast space of compositions to develop high-performance intergrown cathode materials.
Publisher: American Chemical Society (ACS)
Date: 21-03-2023
Publisher: AIP Publishing
Date: 16-08-2010
DOI: 10.1063/1.3462316
Abstract: The chemical interface structure between phosphorus-doped hydrogenated amorphous silicon and aluminum-doped zinc oxide thin films is investigated with soft x-ray emission spectroscopy (XES) before and after solid-phase crystallization (SPC) at 600 °C. In addition to the expected SPC-induced phase transition from amorphous to polycrystalline silicon, our XES data indicates a pronounced chemical interaction at the buried Si/ZnO interface. In particular, we find an SPC-enhanced formation of Si–O bonds and the accumulation of Zn in close proximity to the interface. For an assumed closed and homogeneous SiO2 interlayer, an effective thickness of (5±2) nm after SPC could be estimated.
Publisher: Elsevier BV
Date: 02-2010
Publisher: American Chemical Society (ACS)
Date: 22-10-2020
Publisher: Mary Ann Liebert Inc
Date: 03-2012
Publisher: American Chemical Society (ACS)
Date: 22-04-2013
DOI: 10.1021/JP311012M
Publisher: Springer Science and Business Media LLC
Date: 11-01-2021
Publisher: Elsevier BV
Date: 10-2020
Publisher: American Association for the Advancement of Science (AAAS)
Date: 30-09-2022
Abstract: The geological units on the floor of Jezero crater, Mars, are part of a wider regional stratigraphy of olivine-rich rocks, which extends well beyond the crater. We investigated the petrology of olivine and carbonate-bearing rocks of the Séítah formation in the floor of Jezero. Using multispectral images and x-ray fluorescence data, acquired by the Perseverance rover, we performed a petrographic analysis of the Bastide and Brac outcrops within this unit. We found that these outcrops are composed of igneous rock, moderately altered by aqueous fluid. The igneous rocks are mainly made of coarse-grained olivine, similar to some martian meteorites. We interpret them as an olivine cumulate, formed by settling and enrichment of olivine through multistage cooling of a thick magma body.
Location: United States of America
No related grants have been discovered for Wanli Yang.