Lee, Daehee Wu, Mihye Kim, Dong-Hyun Chae, Changju Cho, Min Kyung Kim, Ji-Young Lee, Sun Sook Choi, Sungho Choi, Youngmin Shin, Tae Joo Chung, Kyung Yoon Jeong, Sunho Moon, Jooho 2024-01-20T01:02:52Z 2024-01-20T01:02:52Z 2021-09-05 2017-07-05 1944-8244 https://pubs.kist.re.kr/handle/201004/122538 The initial reversible capacity, a critical impediment in transition metal oxide-based anodes, is augmented in conversion-reaction-involved CoO anodes for lithium-ion batteries, by incorporating a chemically synthesized Ag nanophase. With an increase in the added amount of Ag nanophase from 5 to 15 wt %, the initial capacity loss decreases linearly up to 31.7%. The Ag nanophase maintains its pristine metallic nature without undergoing phase transformations, even during repeated vigorous electrochemical reactions of the active CoO phase. Complementary ex situ chemical/physical analyses suggest that the Ag nanophase promotes the catalytic generation of reversible gel-like/polymeric films wherein lithium ions are stored capacitively in the low-voltage region below 0.7 V during discharging. These scientific findings would provide a heretofore unrecognized pathway to resolving a major issue associated with the critical irreversibility in conversion-type transition metal oxide anodes. English American Chemical Society ELECTRODE MATERIALS CAPACITY REACTIVITY NANOPARTICLES ORIGIN LAYER COO Understanding the Critical Role of the Ag Nanophase in Boosting the Initial Reversibility of Transition Metal Oxide Anodes for Lithium-Ion Batteries Article 10.1021/acsami.7b01559 1 ACS Applied Materials & Interfaces, v.9, no.26, pp.21715 - 21722 ACS Applied Materials & Interfaces 9 26 21715 21722 scie scopus 000405159100014 2-s2.0-85022093800 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article ELECTRODE MATERIALS CAPACITY REACTIVITY NANOPARTICLES ORIGIN LAYER COO Lithium-ion battery conversion-type anode cobalt oxide Ag nanophase initial Coulombic efficiency