3D TiO2/ZnO hybrid framework: Stable host for lithium metal anodes
| Autor: | Zixue Su, Yuebei Yang, Zhiguang Cao, Junling Qin, Jieying He |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Materials science
General Chemical Engineering Lithium iron phosphate chemistry.chemical_element General Chemistry Electrochemistry Industrial and Manufacturing Engineering Anode Metal chemistry.chemical_compound Transition metal chemistry Chemical engineering visual_art visual_art.visual_art_medium Environmental Chemistry Lithium Dendrite (metal) Faraday efficiency |
| Zdroj: | Chemical Engineering Journal. 427:132026 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2021.132026 |
| Popis: | Lithium (Li) metal is a promising anode material for high energy density lithium-ion batteries. In this work, we develop a 3D hierarchical double transition metal oxide-framework (TiO2/ZnO) that allows the infusion of molten Li into the framework. The TiO2/ZnO framework consists of lithiophobic TiO2 nanotube arrays grown via anodic oxidation and lithiophilic ZnO nanoparticles prepared by thermal decomposition of hydroxide, which acts as host of molten Li forming integrated trilayer TiO2/ZnO/Li. The as-prepared TiO2/ZnO/Li anode exhibits prominent electrochemical performance with a small hysteresis of less than 45 mV beyond 1000 cycle (at 0.5 mA cm−2). The full cell with trilayer TiO2/ZnO/Li anodes coupled with lithium iron phosphate shows outstanding electrochemical performance with a steady Coulombic efficiency and a stable cycle capacity of 133 mA h g−1 at 0.5C after 300 cycles, much higher than 8 mA h g−1 obtained under the same condition but replacing the trilayer TiO2/ZnO/Li anode with bare Li. The unique TiO2/ZnO framework can not only provide lithiophilic base to accommodate Li, but also afford rapid transfer paths for electrons and ions with low local current, which can effectively inhibit the growth of Li dendrite. |
| Databáze: | OpenAIRE |
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