1. Dendrite-Free Lithium Deposition for Lithium Metal Anodes with Interconnected Microsphere Protection
- Author
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Jae-myung Lee, Toshinori Sugimoto, Changhoon Jung, Taehwan Yu, Wonseok Chang, Jaesung Woo, Yunil Hwang, Seok-Gwang Doo, Sung-gyu Kang, Yonggun Lee, Yooseong Yang, Heung Nam Han, Saebom Ryu, Jeong-Yun Sun, and Hyuk Chang
- Subjects
Battery (electricity) ,Materials science ,General Chemical Engineering ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Anode ,Ion ,Metal ,Chemical engineering ,chemistry ,visual_art ,Materials Chemistry ,visual_art.visual_art_medium ,Lithium ,Dendrite (metal) ,0210 nano-technology ,Current density ,Deposition (law) - Abstract
A lithium (Li) metal anode is required to achieve a high-energy-density battery, but because of an undesirable growth of Li dendrites, it still has safety and cyclability issues. In this study, we have developed a microsphere-protected (MSP) Li metal anode to suppress the growth of Li dendrites. Microspheres could guide Li ions to selective areas and pressurize dendrites during their growth. Interconnections between microspheres improved the pressurization. By using an MSP Li metal anode in a 200 mAh pouch-type Li/NCA full cell at 4.2 V, dendrite-free Li deposits with a density of 0.4 g/cm3, which is 3 times greater than that in the case of bare Li metal, were obtained after charging at 2.9 mAh/cm2. The MSP Li metal enhanced the cyclability to 190 cycles with a criterion of 90% capacity retention of the initial discharge capacity at a current density of 1.45 mA/cm2.
- Published
- 2017
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