https://scholars.lib.ntu.edu.tw/handle/123456789/625454
標題: | Preparation, structural, and characterizations of SnO2-coated TiNb2O7 anode materials for lithium-ion batteries | 作者: | Liang K.-H Gupta K.K CHUNG-HSIN LU Som S. |
關鍵字: | electrochemical performance; iNb2O7; lithium-ion batteries; SnO2 coating | 公開日期: | 2022 | 來源出版物: | Journal of the American Ceramic Society | 摘要: | SnO2-coated TiNb2O7 powders were synthesized via the solution coating method in the present research. The SnO2 layers with a thickness of 3–5 nm were homogeneously coated on the surface of TiNb2O7 particles. TiNb2O7 coated with SnO2 of 5 mol% with high Li+ diffusion coefficient delivered the discharge capacity of 319.5 mAh/g, which was 6.6% higher than that of the non-coated samples. The enhancement of capacity for the coated TiNb2O7 was owing to the low charge-transfer resistance of 17.5 Ω in contrary to the non-coated TiNb2O7 (27.8 Ω). SnO2-coated TiNb2O7 possessed an improved capacity retention of 85.2% at 5 C after 100 cycles, superior to the non-coated TiNb2O7 (79.8%). On the other hand, the excessive amounts of SnO2 coating led to the reduction in the capacity of the prepared samples. The excessive amounts of SnO2 layers suppressed the Li+ diffusion and increased the charge-transfer resistance. The obtained results in this study indicated that coating of TiNb2O7 with appropriate amounts of SnO2 significantly improved the electrochemical performance of TiNb2O7. © 2022 The American Ceramic Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131911047&doi=10.1111%2fjace.18549&partnerID=40&md5=a4dd6a455e626e2541ba9617ddc076ef https://scholars.lib.ntu.edu.tw/handle/123456789/625454 |
ISSN: | 00027820 | DOI: | 10.1111/jace.18549 | SDG/關鍵字: | Anodes; Charge transfer; Coated materials; Electric discharges; Lithium compounds; Lithium-ion batteries; Anode material for lithium ion batteries; Charge transfer resistance; Coated sample; Coating methods; Discharge capacities; Electrochemical performance; Inb2O7; Li +; SnO2 coating; Synthesised; Coatings |
顯示於: | 化學工程學系 |
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