TY  - JOUR
AU  - Huang, Zhuojun
AU  - Choudhury, Snehashis
AU  - Paul, Neelima
AU  - Thienenkamp, Johannes Helmut
AU  - Lennartz, Peter
AU  - Gong, Huaxin
AU  - Müller-Buschbaum, Peter
AU  - Brunklaus, Gunther
AU  - Gilles, Ralph
AU  - Bao, Zhenan
TI  - Effects of Polymer Coating Mechanics at Solid‐Electrolyte Interphase for Stabilizing Lithium Metal Anodes
JO  - Advanced energy materials
VL  - 12
IS  - 5
SN  - 1614-6832
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2022-01172
SP  - 2103187 -
PY  - 2022
AB  - Lithium metal batteries are next-generation energy storage devices that rely on the stable electrodeposition of lithium metal during the charging process. The major challenge associated with this battery chemistry is related to the uneven deposition that leads to dendritic growth and poor coulombic efficiency (CE). A promising strategy for addressing this challenge is utilizing a polymer coating on the anodic surface. While several works in the past have evaluated polymer coatings, the requirements for polymer design are still unclear. In this work, the effect of polymer dynamics on lithium metal deposition is specifically investigated. Electrolyte (solvent) blocking perfluoropolyether polymer networks with evenly spaced H-bonding sites of various strengths are designed, resulting in significant differences in the molecular ordering, as analyzed by X-ray scattering measurements. The differences in the H-bonding strength directly impact the mechanical properties of these materials, thus providing a controlled set of samples with a range of polymer dynamics for electrodeposition studies. Finally, a systematic evaluation of the lithium metal electrodeposition quality with these polymers as anodic coating shows that polymers with flowability or faster polymer dynamics exhibit higher CE. These experimental findings provide rational design principles for soft polymer coatings on lithium metal anodes.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000732690000001
DO  - DOI:10.1002/aenm.202103187
UR  - https://juser.fz-juelich.de/record/905999
ER  -