Abstract
Lithium metal anode is one of the ideal anodes with high energy density. However, the problems of lithium dendrite growth and infinite volume expansion lead to safety and cycling stability problems in lithium metal anode batteries, which became the biggest obstacle to the commercial application of lithium metal anodes. This paper reports a three-dimensional nanostructured TiO2 flexible lithium metal anode scaffold loaded with Sn. Three-dimensional nanostructured TiO2 has a high specific surface area that can accommodate lithium deposition with high capacity while suppressing lithium dendrite growth. At a current density of 1 mA cm−2 and a deposition volume of 5 mAh cm−2, the 35th circulate coulomb efficiency of the lithium metal anode scaffold is still 98%. The nano-Sn metal with better pro-lithium properties loaded on the lithium metal anode scaffold composed of TiO2 skeleton, which can sufficiently reduce the nucleation potential barrier of Li+ and enable the uniform deposition of lithium on the support, assembled into a full coin cell using a LiFeO4 (LFP)-based positive electrode exhibit high-capacity retention and high energy density (443 Wh kg−1) after 200 cycles at 1C (= 170 mA g−1).
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The data that support the findings of this study are available from the corresponding authors.
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Funding
This work was supported by Yunnan Major Scientific and Technological Projects (grant no. 202202AG050003); the Natural Science Foundation of Yunnan Province (grant no. 202101AW070006); the Yunnan Fundamental Research Projects (grant no. 202101BE070001-018, 202201AT070070).
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Bingnan Deng: conceptualization and writing—original draft. Rongwei Huang: writing—review and editing. Dan You: writing—review and editing. Wenhao Yang: writing—review and editing. Jiyue Hou: conceptualization and writing—review. Ao Li: conceptualization and writing—review. Dong Yang: conceptualization and writing—review. Fei Wang: conceptualization and writing—review. Xue Li: writing—review and editing and funding acquisition. Yiyong Zhang: writing—review and editing and funding acquisition.
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Deng, B., Huang, R., You, D. et al. The chemically deposited Sn combines with the TiO2 3D reticular structure to form a stable and uniform lithium metal anode. Ionics (2024). https://doi.org/10.1007/s11581-024-05474-9
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DOI: https://doi.org/10.1007/s11581-024-05474-9