@article{00077ca42869441ba7ffe6adcf597497,
title = "Regulated Li Electrodeposition Behavior through Mesoporous Silica Thin Film in Anode-Free Lithium Metal Batteries",
abstract = "Lithium metal anode material suffers from the formation of a dendritic structure and manufacturing difficulties in Li metal batteries. Although anode-free lithium metal batteries (AFLMBs) have received broad interest due to their high energy density and easy fabrication, controlling the morphology of electrodeposited Li is challenging. In this work, we report on the use of mesoporous silica thin films (MSTFs) with perpendicular nanochannel (pore size {\^a} 6 nm) stacking on a stainless steel (SS) substrate as the MSTF{\^a}{\v S} SS for advancing AFLMBs. The MSTF{\^a}{\v S} SS substrate with inorganic structures improves the stability of the Li plating/stripping process in Li-MSTF{\^a}{\v S} SS cells at a current density of 2 mA cm-2 and capacity of 2 mAh cm-2. A LiFePO4 cathode (mass loading: {\^a} 12 mg cm-2) paired with the MSTF{\^a}{\v S} SS electrode delivered an initial discharge capacity of 154 mA h g-1, which is {\^a} 20% higher than that of the bare SS electrode at a C rate of 0.1C. Grazing-incidence wide-Angle X-ray scattering results suggest that MSTF regulates the Li electrodeposition process with individual microcrystals and leads to the formation of Li(110). Also, the electrodeposited Li film with a uniform surface is obtained on the MSTF{\^a}{\v S} SS substrate. The designed porous MSTF with high stability, ultrasmall pore size, and lithiophilic properties enhances the performance of AFLMBs with the LiFePO4 cathode during 100 cycles. ",
keywords = "anode-free lithium metal battery, grazing-incidence wide-Angle X-ray scattering, lithium electrodeposition, mesoporous silica thin film, online GC",
author = "Lo, {Chang An} and Chang, {Chiao Chun} and Tsai, {Yi Wei} and Jiang, {Shi Kai} and Hwang, {Bing Joe} and Mou, {Chung Yuan} and Wu, {Heng Liang}",
note = "Funding Information: This research is mainly supported by MOST (Ministry of Science and Technology), Taiwan (Contract Nos. 109-2124-M-002-009 and 109-2113-M-002-016-). The authors thank Ms. C.-Y. Chien of the Ministry of Science and Technology (National Taiwan University) for the assistance with focused ion beam, FETEM, and EDS experiments, Ms. H.-B. Chen of the Ministry of Science and Technology (National Taiwan University) for the assistance in XPS experiments, Ms. C.-Y. Lin and Y.-Y. Yang of the Ministry of Science and Technology (National Taiwan University) for the assistance in SEM experiments, and Mr. C.-Y. Chung at the Institute of Atomic and Molecular Sciences Academia Sinica for the cell development. H.L.W. thanks the Center of Atomic Initiative for New Materials, National Taiwan University, from the Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education in Taiwan (108L9008) for financial support. Publisher Copyright: {\textcopyright} ",
year = "2021",
month = may,
day = "24",
doi = "10.1021/acsaem.1c00664",
language = "English",
volume = "4",
pages = "5132--5142",
journal = "ACS Applied Energy Materials",
issn = "2574-0962",
publisher = "American Chemical Society",
number = "5",
}