Mixed Ionic and Electronic Conductor for Li‐Metal Anode Protection

Adv. Mater. 2018, 30, 1705105 The author list for this paper is hereby corrected to the author list given above. The updated affiliations are listed as follows: Prof. J. Yan, Prof. B. Ding College of Textile Donghua University Shanghai 200131, China E-mail: binding@dhu.edu.cn Prof. J. Yan, Prof. X. Liu Department of Mechanical & Aerospace Engineering West Virginia University WV 26505, USA E-mail: xingbo.liu@mail.wvu.edu Prof. B. Li Department of Orthopaedics West Virginia University WV 26505, USA Prof. J. Yu, Prof. B. Ding Innovation Center for Textile Science and Technology Donghua University Shanghai 200051, China This is to give proper credit to work carried out by Jianhua Yan under the supervision of Xingbo Liu at West Virginia University, where Jianhua Yan previously worked as a postdoctoral researcher. Bingyun Li participated in the discussion of developing the concept that is shown in the paper and gave experimental guidance to Jianhua Yan at West Virginia University. The first part of the Experimental Section is also corrected to read: “Fabrication of LLTO NPs, LLTO Films, and the Hybrid LLTO/Li Anodes: All chemicals were obtained from Sigma-Aldrich with a purity of 98% or higher. Li3xLa2/3–xTiO3 (x = 0.1–0.11) was synthesized by molten salt and solid-state reaction method. In brief, stoichiometric amounts of dried Li2CO3, La2O3, and TiO2 (Li:La: Ti = 1.1:1:2) were mixed thoroughly in ethanol, with a molar concentration of 4 mol L–1 followed by magnetic stirring for 30 min. Then a uniform paste was formed by adding chloride flux of LiCl into the solution. The R ratio, which is defined as the molar ratio between the flux and the LLTO, was controlled at 8. The paste was transferred into a ceramic crucible with a lid, fired at 300 °C for 3 h to remove water and crystal water; then the dried powder was fired at 800 °C for 4 h to decarbonate, followed by sintering at 1150 °C for 10 h. The samples were then cooled to room temperature. The final LLTO NPs were obtained by washing twice with deionized water to remove the flux and then dried in a vacuum oven overnight at 80 °C. Both the heating rate and cooling rate were 5 °C min–1. To consider the evaporation of lithium during the synthesis, the stoichiometry of Li2CO3 was 10% higher than the final composition. For the solid-state reaction, stoichiometric amounts of dried Li2CO3, La2O3 and TiO2 (Li:La:Ti = 1.1:1:2) were mixed thoroughly in ethanol and then sintered at 1350 °C for 12 h. To fabricate LLTO films, 3 wt% of LiCl and 97 wt% of LLTO NPs were mixed together and pressed into pellets (with a thickness of ≈8 μm), which was then soaked at 1100 °C for 12 h. Before fabricating the LLTO/Li anodes, a little electrolyte was used to clean the surface of the Li-metal in the glove box. After the evaporation of the electrolyte, three drops of toluene were dipped onto Li-metal surface, then pressed the thin LLTO film onto Li-metal with a force of 5 N for 3 h.” Herein, in the first sentence “and solid-state reaction” is added and the sentence later pertaining to the solid-state reaction: “For the solid-state reaction, stoichiometric amounts of dried Li2CO3, La2O3 and TiO2 (Li:La:Ti = 1.1:1:2) were mixed thoroughly in ethanol and then sintered at 1350 °C for 12 h.” is also added. Lastly, the Acknowledgements are updated as given below: This work is supported by the National Natural Science Foundation of China (No. 51673037 and 51473030) and the Research Challenge Grant of the West Virginia Higher Education Policy Commission Division of Science and Research (No. HEPC.dsr.12.27).