Controlled Prelithiation of SnO2/C Nanocomposite Anodes for Building Full Lithium-Ion Batteries
| Autor: | Deyang Qu, Feifei Li, Huainan Qu, Xiaoxiao Zhang, Caleb J. Abegglen, Dong Zheng, Gongwei Wang |
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| Rok vydání: | 2020 |
| Předmět: |
Nanocomposite
Materials science chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cathode 0104 chemical sciences law.invention Anode chemistry Chemical engineering law Reagent Hydrothermal synthesis General Materials Science Lithium 0210 nano-technology Carbon Faraday efficiency |
| Zdroj: | ACS Applied Materials & Interfaces. 12:19423-19430 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.0c00729 |
| Popis: | SnO2 is an attractive anodic material for advanced lithium-ion batteries (LIBs). However, its low electronic conductivity and large volume change in lithiation/delithiation lead to a poor rate/cycling performance. Moreover, the initial Coulombic efficiencies (CEs) of SnO2 anodes are usually too low to build practical full LIBs. Herein, a two-step hydrothermal synthesis and pyrolysis method is used to prepare a SnO2/C nanocomposite, in which aggregated SnO2 nanosheets and a carbon network are well-interpenetrated with each other. The SnO2/C nanocomposite exhibits a good rate/cycling performance in half-cell tests but still shows a low initial CE of 45%. To overcome this shortage and realize its application in a full-cell assembly, the SnO2/C anode is controllably prelithiated by the lithium-biphenyl reagent and then coupled with a LiCoO2 cathode. The resulting full LIB displays a high capacity of over 98 mAh g-1LCO in 300 cycles at 1 C rate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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