S-Doped Graphene-Regional Nucleation Mechanism for Dendrite-Free Lithium Metal Anodes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F19%3A10242318" target="_blank" >RIV/61989100:27740/19:10242318 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.201804000" target="_blank" >https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.201804000</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/aenm.201804000" target="_blank" >10.1002/aenm.201804000</a>
Alternative languages
Result language
angličtina
Original language name
S-Doped Graphene-Regional Nucleation Mechanism for Dendrite-Free Lithium Metal Anodes
Original language description
Lithium metal is the most promising anode material for next-generation batteries, owing to its high theoretical specific capacity and low electrochemical potential. However, the practical application of lithium metal batteries (LMBs) has been plagued by the issues of uncontrollable lithium deposition. The multifunctional nanostructured anode can modulate the initial nucleation process of lithium before the extension of dendrites. By combing the theoretical design and experimental validation, a novel nucleation strategy is developed by introducing sulfur (S) to graphene. Through first-principles simulations, it is found that S atom doping can improve the Li adsorption ability on a large area around the S doping positions. Consequently, S-doped graphene with five lithiophilic sites rather than a single atomic site can serve as the pristine nucleation area, reducing the uneven Li deposition and improving the electrochemical performance. Modifying Li metal anodes by S-doped graphene enables an ultralow overpotential of 5.5 mV, a high average Coulombic efficiency of 99% over more than 180 cycles at a current density of 0.5 mA cm MINUS SIGN 2 for 1.0 mAh cm MINUS SIGN 2 , and a high areal capacity of 3 mAh cm MINUS SIGN 2 . This work sheds new light on the rational design of nucleation area materials for dendrite-free LMB. (C) 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů