10.1002\/advs.202401350<\/a><\/p>\nAuthors:<\/h4>\n
Rahmandhika Firdauzha Hary Hernandha, B. Umesh, Jagabandhu Patra, Chun\u2010Yen Chen, Ju Li, Jeng\u2010Kuei Chang<\/p>\n
Abstract:<\/h4>\n
A supercritical carbon dioxide (SCCO2<\/sub>) fluid, characterized by gas-like diffusivity, near-zero surface tension, and excellent mass transfer properties, is used as a precursor to produce silicon oxycarbide (SiOC) coating. SCCO2<\/sub> disperses and reacts with Si particles to form an interfacial layer consisting of Si, O, and C. After an 850 \u00b0C annealing process, a conformal SiOC coating layer forms, resulting in core-shell Si@SiOC particles. High-resolution transmission electron microscopy and its X-ray line-scan spectroscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, and Raman spectroscopy, are used to examine the SiOC formation mechanism. Effects of SCCO2<\/sub> interaction time on the SiOC properties are investigated. The SiOC layer connects the Si@SiOC particles, improving electron and Li+<\/sup> transport. Cyclic voltammetry, galvanostatic intermittent titration technique, and electrochemical impedance spectroscopy are employed to examine the role of SiOC during charging\/discharging. Operando X-ray diffraction data reveal that the SiOC coating reduces crystal size of the formed Li15<\/sub>Si4<\/sub> and increases its formation\/elimination reversibility during cycling. The Si@SiOC electrode shows a capacitiy of 2250 mAh g-1<\/sup> at 0.2 A g-1<\/sup>. After 500 cycles, the capacity retention is 72% with Coulombic efficiency above 99.8%. A full cell consisting of Si@SiOC anode and LiNi0.8<\/sub>Co0.1<\/sub>Mn0.1<\/sub>O2<\/sub> cathode is constructed, and its performance is evaluated.<\/p>\n","protected":false},"excerpt":{"rendered":"DOI: 10.1002\/advs.202401350 Authors: Rahmandhika Firdauzha Hary Hernandha, B. Umesh, Jagabandhu Patra, Chun\u2010Yen Chen, Ju Li, Jeng\u2010Kuei Chang Abstract: A supercritical carbon dioxide (SCCO2) fluid, characterized by gas-like diffusivity, near-zero surface tension, and excellent mass transfer properties, is used as a precursor to produce silicon oxycarbide (SiOC) coating. SCCO2 disperses and reacts with Si particles to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-26","post","type-post","status-publish","format-standard","hentry","category-bcs-800-battery-cycler"],"_links":{"self":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/26","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=26"}],"version-history":[{"count":0,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/26\/revisions"}],"wp:attachment":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=26"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=26"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=26"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}