Designing a self-healing protective film on a lithium metal anode for long-cycle-life lithium-oxygen batteries
| Autor: | Tao Sun, Zhi-Wen Chang, Xin-Bo Zhang, Yun-Hai Zhu, Tong Liu, Yan-Bin Yin, Yue Yu, Jin-Ling Ma, Xiao-Yang Yang |
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| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Charge cycle Materials science Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Lithium hydroxide 0104 chemical sciences Tetraethyl orthosilicate Anode Corrosion chemistry.chemical_compound chemistry Chemical engineering General Materials Science Lithium 0210 nano-technology |
| Zdroj: | Energy Storage Materials. 18:382-388 |
| ISSN: | 2405-8297 |
| DOI: | 10.1016/j.ensm.2019.01.009 |
| Popis: | The development of high energy density Li-O2 batteries is hindered by many scientific and technological challenges, especially the intrinsic corrosion of the lithium metal anode induced by O2, H2O and discharge intermediates in electrolytes. In response, as a proof-of-concept experiment, we first propose and demonstrate a facile and highly efficient strategy for the in situ growth of a self-healing protective film on a lithium metal anode, wherein tetraethyl orthosilicate plays a key role as a novel film-forming electrolyte additive. This additive can spontaneously and effectively react with the main component of the detrimental surface corrosion layer (lithium hydroxide) on the lithium metal anode, forming a self-healing protective film with dynamic repair ability during the cycling process. Unexpectedly, the protected lithium metal anode endows the Li-O2 batteries with significantly improved battery cycle performance (up to 144 cycles). We consider that our facile, low-cost, and highly effective lithium protection strategy presents a new avenue to address the daunting corrosion problem of lithium metal anodes in Li-O2 batteries, which can be easily extended to other metal-O2 battery systems such as Na-O2 batteries. |
| Databáze: | OpenAIRE |
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