Dense All‐Electrochem‐Active Electrodes for All‐Solid‐State Lithium Batteries
Author(s)
Li, Meiying; Liu, Tao; Shi, Zhe; Xue, Weijiang; Hu, Yong‐sheng; Li, Hong; Huang, Xuejie; Li, Ju; Suo, Liumin; Chen, Liquan; ... Show more Show less
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The energy density presents the core competitiveness of lithium (Li)-ion batteries. In conventional Li-ion batteries, the utilization of the gravimetric/volumetric energy density at the electrode level is unsatisfactory (<84 wt% and <62 vol%, respectively) due to the existence of non-electrochemical active parts among the 3D porous electrodes, including electrolytes, binders, and carbon additives. These are regarded as indispensable and irreducible components of the electronic and ionic transport network. Here, a dense “all-electrochem-active” (AEA) electrode for all-solid-state Li batteries is proposed, which is entirely constructed from a family of superior mixed electronic–ionic-conducting cathodes, to minimize the energy density gap between the accessible and theoretical energy density at the electrode level. Furthermore, with the ionic–electronic-conductive network self-supported from the AEA cathode, the dense hybrid sulfur (S)-based AEA electrode exhibits a high compacted filling rate of 91.8%, which indicates a high energy density of 777 W h kg−1 and 1945 W h L−1 at the electrode level based on the total cathodes and anodes when at 70 °C.
Date issued
2021-05-17Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering; Massachusetts Institute of Technology. Department of Materials Science and EngineeringJournal
Advanced Materials
Publisher
Wiley
Citation
Li, M., Liu, T., Shi, Z., Xue, W., Hu, Y.-s., Li, H., Huang, X., Li, J., Suo, L., Chen, L., Dense All-Electrochem-Active Electrodes for All-Solid-State Lithium Batteries. Adv. Mater. 2021, 33, 2008723
Version: Author's final manuscript
ISSN
0935-9648
1521-4095