Excellent Cycle Life of Lithium‐Metal Anodes in Lithium‐Ion Batteries with Mussel‐Inspired Polydopamine‐Coated Separators

Ryou, Myung‐Hyun; Lee, Dong Jin; Lee, Je-Nam; Lee, Yong Min; Park, Jung-Ki; Choi, Jang Wook

doi:10.1002/aenm.201100687

Cited by 421 publications

(298 citation statements)

References 47 publications

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“…As we used bare stainless steel foil as the substrate for lithium deposition, it was also possible to subsequently strip the deposited lithium completely from the substrate, whereupon we observed a thin film attached to the surface of stainless steel foil. This layer is the SEI, which we were able to isolate completely from the lithium metal, unlike previous studies in which the SEI layers are all characterized while on the lithium surface [29][30][31]39 . By isolating the SEI, we were able to accurately investigate the structure and chemical composition of the SEI without interference from metallic lithium.…”

Section: Resultsmentioning

confidence: 48%

“…The Coulombic efficiency was examined using our two-electrode coin cell design, calculated as the amount of lithium stripped (calculated based on the capacity extracted) divided by the amount of lithium plated (calculated based on the capacity deposited) on the stainless steel foil. Unlike symmetric cells that use two electrodes of lithium foil that are essentially infinite sources for lithium [29][30][31]39 , our design allows the lithium loss on cycling to be accurately determined. As the cycle life of lithium metal electrodes can be correlated with electrolyte decomposition 11,12,30 , the same amount of electrolyte (30 ml) was used in each cell.…”

Section: Resultsmentioning

confidence: 99%

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The synergetic effect of lithium polysulfide and lithium nitrate to prevent lithium dendrite growth

et al. 2015

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Lithium metal has shown great promise as an anode material for high-energy storage systems, owing to its high theoretical specific capacity and low negative electrochemical potential. Unfortunately, uncontrolled dendritic and mossy lithium growth, as well as electrolyte decomposition inherent in lithium metal-based batteries, cause safety issues and low Coulombic efficiency. Here we demonstrate that the growth of lithium dendrites can be suppressed by exploiting the reaction between lithium and lithium polysulfide, which has long been considered as a critical flaw in lithium-sulfur batteries. We show that a stable and uniform solid electrolyte interphase layer is formed due to a synergetic effect of both lithium polysulfide and lithium nitrate as additives in ether-based electrolyte, preventing dendrite growth and minimizing electrolyte decomposition. Our findings allow for re-evaluation of the reactions regarding lithium polysulfide, lithium nitrate and lithium metal, and provide insights into solving the problems associated with lithium metal anodes.

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Section: Resultsmentioning

confidence: 48%

Section: Resultsmentioning

confidence: 99%

The synergetic effect of lithium polysulfide and lithium nitrate to prevent lithium dendrite growth

et al. 2015

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“…또한 리튬 이온 전지의 고용량화 및 전동공구, 전기자 동차 등 대용량 고출력 분야로의 응용이 지속적으로 확대됨 [1][2][3][4][5] 에 따라 폭발, 발화와 같은 전지 안전성에 대 한 중요성이 크게 대두되고 있다.…”

Section: 서 론unclassified

The Study on Prediction of Oxidative Decomposition Potential by Comparison between Simulation and Electrochemical Methods to Develop the Binder for High-voltage Lithium-ion Batteries

Yu¹,

Kashaev²,

Lee³

2013

Journal of the Korean Electrochemical Society

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: As the development of available binder in the harsh conditions is needed, we propose the proper binder for high-voltage lithium-ion secondary batteries based on the quantum chemistry modeling. The optimized structures, HOMO (Highest Occupied Molecular Orbital) energies and ionization potentials of 4 binders, which were considered from monomer to tetramer, were investigated by the semi-empirical and DFT (Density Functional Theory) calculations. The results show that the ionization potential values by calculation tend to be close to the oxidation potentials from the measurement of linear sweep voltametry (LSV). The order of oxidative resistance from high value to low value is following: poly(hexafluropropylene), poly(vinylidene fluoride), poly(methyl acrylate) and poly(acryl amide). Also these results correspond with the experimental values. Thus, we find the reason why HOMO (Highest Occupied Molecular Orbital) energy of PHFP has the highest value than other binders by analysis of HOMO orbital structures.

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“…To overcome this problem, the focus has been shifted recently from modification of the cathodes to modification of the separators. Strategies that have been employed to modify the surface of the separator have involved using various polymers for higher electrolyte intake [49][50][51][52] and various carbon coatings to entrap the lithium polysulfides on the cathode side and, thereby, stop the shuttling phenomenon [53][54][55]. Herein, we report a novel approach of using a bifunctional separatorformed by spray-coating poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on top of the separator-that is not only a facile and effective method for suppressing the shuttling mechanism of lithium polysulfides but also modifies the surface of the separator from hydrophobic to hydrophilic, resulting in greater wettability, enhanced electrolyte intake, and increased electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Bifunctional separator as a polysulfide mediator for highly stable Li–S batteries

Abbas

Ibrahem

et al. 2016

J. Mater. Chem. A

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CitationBifunctional separator as a polysulfide mediator for highly stable Li-S batteries 2016 J. Graphical Abstract ABSTRACTThe shuttling process involving lithium polysulfides is one of the major factors responsible for the degradation in capacity of lithium-sulfur batteries (LSBs). Herein, we demonstrate a novel and simple strategy-using a bifunctional separator, prepared by spraying poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on pristine separator-to obtain long-cycle LSBs. The negatively charged SO 3 -groups present in PSS act as an electrostatic shield for soluble lithium polysulfides through mutual coulombic repulsion, whereas PEDOT provides chemical interactions with insoluble polysulfides (Li 2 S, Li 2 S 2 ). The dual shielding effect can provide an efficient protection from the shuttling phenomenon by confining lithium polysulfides to the cathode side of the battery. Moreover, coating with PEDOT:PSS transforms the surface of the separator from hydrophobic to hydrophilic, thereby improving the electrochemical performance. We observed an ultralow decay of 0.0364% per cycle when we ran the battery for 1000 cycles at 0.25 C-far superior to that of the pristine separator and one of the lowest recorded values reported at a low current density. We examined the versatility of our separator by preparing a flexible battery that functioned well under various stress conditions; it displayed flawless performance. Accordingly, this economical and simple strategy appears to be an ideal platform for commercialization of LSBs.

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Excellent Cycle Life of Lithium‐Metal Anodes in Lithium‐Ion Batteries with Mussel‐Inspired Polydopamine‐Coated Separators

Abstract: Figure 5 . Digital-camera images of separators after thermal treatment at 140 ° C for 1 h. a) A polydopamine-treated-PE separator. b) A bare-PE separator.

Cited by 421 publications

References 47 publications

The synergetic effect of lithium polysulfide and lithium nitrate to prevent lithium dendrite growth

The synergetic effect of lithium polysulfide and lithium nitrate to prevent lithium dendrite growth

The Study on Prediction of Oxidative Decomposition Potential by Comparison between Simulation and Electrochemical Methods to Develop the Binder for High-voltage Lithium-ion Batteries

Bifunctional separator as a polysulfide mediator for highly stable Li–S batteries

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