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Hybrid Effect of Micropatterned Lithium Metal and Three Dimensionally Ordered Macroporous Polyimide Separator on the Cycle Performance of Lithium Metal Batteries

Title
Hybrid Effect of Micropatterned Lithium Metal and Three Dimensionally Ordered Macroporous Polyimide Separator on the Cycle Performance of Lithium Metal Batteries
Authors
Kim, DohwanMunakata, HirokazuPark, JoonamRoh, YoungjoonJin, DaheeRyou, Myung-HyunKanamura, KiyoshiLee, Yong Min
DGIST Authors
Kim, Dohwan; Munakata, Hirokazu; Park, Joonam; Roh, Youngjoon; Jin, Dahee; Ryou, Myung-Hyun; Kanamura, Kiyoshi; Lee, Yong Min
Issue Date
2020-04
Citation
ACS Applied Energy Materials, 3(4), 3721-3727
Type
Article
Article Type
Article
Author Keywords
dendrite formationmicropatternthree dimensionally ordered microporous polyimide separatorion distributionlithium metal secondary battery
Keywords
ION BATTERIESELECTROLYTESANODESCOMPOSITECAPACITYSURFACESIZESOFT
ISSN
2574-0962
Abstract
Short cycle life of the lithium metal secondary battery (LMSB) is largely ascribed to the dendritic growth of lithium metal during the charging process followed by continuous electrolyte decomposition. To make up for this intrinsic drawback of lithium metal, two pioneering techniques, micropatterning on lithium metal and three dimensionally ordered microporous polyimide (3DOM PI) separator, are combined to ascertain their hybrid effect on the cycle performance of LMSB. When a unit cell consisting of LiNi0.6Mn0.2Co0.2O2/3DOM PI separator/patterned lithium metal is cycled at the charging and discharging c-rates of 0.3C and 1C (1C = 2.5 mA), respectively, above 80% of the initial discharge capacity is maintained even after 400 cycles, while a control cell with polyethylene separator survives only for 130 cycles. This tremendous improvement is ascribed to the combination effect of inducing preferential lithium electrodeposition reaction into the micropattern and the uniform distribution of lithium ions on the nonpatterned lithium surface region by the 3DOM PI separator. Thus, combining these two technologies is very promising for LMSB commercialization in the future. © 2020 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/12245
DOI
10.1021/acsaem.0c00186
Publisher
American Chemical Society
Related Researcher
  • Author Lee, Yong Min Battery Materials & Systems LAB
  • Research Interests Battery; Electrode; Electrolyte; Separator; Simulation
Files:
There are no files associated with this item.
Collection:
Department of Energy Science and EngineeringBattery Materials & Systems LAB1. Journal Articles


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