Morphology and Active-Site Engineering for Stable Round-Trip Efficiency Li鈥揙2 Batteries: A Search for the Most Active Catalytic Site in Co3O4

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• 作者：Kyeongse Song ; Eunbi Cho ; Yong-Mook Kang
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：September 4, 2015
• 年：2015
• 卷：5
• 期：9
• 页码：5116-5122
• 全文大小：606K
• ISSN：2155-5435

文摘

For the purpose of finding the catalytic active site for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) in the crystal structure of Co₃O₄, a {100} faceted Co₃O₄ cube enclosed by only a Co²⁺ site and a {112} faceted Co₃O₄ plate also exposing a Co³⁺ site was adopted as a catalyst for lithium鈥搊xygen (Li鈥揙₂) batteries. Thus, we found that the Co³⁺ site plays the crucial role of determining the adsorption properties of reactants, enabling high round-trip efficiency and cyclic stability, as well as the morphology of discharge products such as Li₂O₂.