Batteries: High Dielectric, Robust Composite Protective Layer for Dendrite‐Free and LiPF<sub>6</sub> Degradation‐Free Lithium Metal Anode (Adv. Funct. Mater. 48/2019)

Jang, Eun Kwang; Ahn, Jinhyeok; Yoon, Sukeun; Cho, Kuk Young

doi:10.1002/adfm.201970326

Cited by 7 publications

(10 citation statements)

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“…Compared with traditional anode materials, Li metal has the advantages of the ultrahigh theoretical specific capacity (3860 mAh g −1 ) and the lowest redox potential (−3.04 V vs standard hydrogen electrode, SHE), [ 1–4 ] and is remarkably recognized as the most competitive anode for the high‐energy‐density Li ion batteries (LIBs). Unfortunately, the poor rate capability, insufficient working lifespan, and the severe safety problems have limited the practical use in Li metal batteries (LMBs).…”

Section: Introductionmentioning

confidence: 99%

Grain‐Boundary‐Rich Artificial SEI Layer for High‐Rate Lithium Metal Anodes

Chen

Liang

Wang

et al. 2021

Adv Funct Materials

136

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The sluggish lithium diffusion at the electrode/electrolyte interface is one of the main obstacles to achieve superior rate capability of Li metal anodes for rechargeable batteries. Herein, a dense and uniform inorganic solid electrolyte interface (SEI) layer composed of ZrO 2 , Li 2 O, Li 3 N, and LiN x O y is constructed on the surface of Li metal via the spontaneous reaction between Li metal and zirconyl nitrate (ZrO(NO 3 ) 2 ) solution in dimethyl sulfoxide. The abundant grain boundaries in the artificial SEI created by the multicomponent enable the rapid diffusion of Li ions at the interface. As a result, the Li metal anode treated with zirconyl nitrate (LiZrO(NO 3 ) 2 @Li) delivers a stable cycle performance of over 550 h at a high current density of 10 mA cm −2 and a high areal capacity of 10 mAh cm −2 . When paired with a high-loading LiCoO 2 cathode (19 mg cm −2 ), the LiZrO(NO 3 ) 2 @Li anode shows much enhanced rate performance and long-term cycle stability without Li dendrite formation. The construction of an inorganic SEI layer with a high density of grain boundary provides new insights for the design of high-rate and dendrite-free Li metal anodes for high-energy-density batteries.

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Section: Introductionmentioning

confidence: 99%

Grain‐Boundary‐Rich Artificial SEI Layer for High‐Rate Lithium Metal Anodes

Chen

Liang

Wang

et al. 2021

Adv Funct Materials

136

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“…On the other hand, it is known that the improvement of σ is also due to the ionic conductivity nature of PVDF‐HFP and NTP and the formation of fast Li + transport channels at the interface between inorganic particles and polymer matrix. [ 33,45,46 ] When the NTP content further increases (>20 wt%), the σ of composite separators gradually decreases, since the poor interfacial contact and the aggregation of NTP particles, resulting in higher interfacial resistance and poor ion migration of PP@PHNTP‐x separators. Therefore, the PP@PNNTP‐20 with high σ is optimally selected as the research sample.…”

Section: Resultsmentioning

confidence: 99%

“…The increase of

t_{{Li}^{+}}

is due to the presence of PVDF‐HFP with a high dielectric constant, which can promote the release of free Li + . [ 45 ] Moreover, the Li + transport with

t_{{Li}^{+}}

about 1 in NTP particles was beneficial for improving the whole

t_{{Li}^{+}}

of the PP@PHNTP‐20. These results show that the PP@PHNTP‐20 possesses a good Li + mobility, guaranteeing even Li + flux distribution.…”

Section: Resultsmentioning

confidence: 99%

Regulating Lithium Deposition Behaviors by Functional PVDF‐HFP/NaTi₂(PO₄)₃ Composite Separator

Shang

Zhou

et al. 2022

Adv Materials Inter

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The unpredictable growth of lithium (Li) dendrite is one of the crux issues in the commercial application of the Li‐metal batteries (LMBs). Herein, a flexible PVDF‐HFP/LiClO4/NaTi2(PO4)3 (NTP) layer modified polypropylene (PP) separators are designed to achieve homogeneous nucleation and growth of Li. The introduction of NTP particles not only reduces the crystallinity of the polymer but also generates a rapid Li+ migration pathway at the interface, which is conducive to regulating the Li+ flux and guiding the uniform Li deposition by improving ionic conductivity. In addition, because of the high electrolyte wettability and the enhanced mechanical strength of the functionalized separator, the mass transport capability is promoted and the penetration of Li dendrite can be avoided. Consequently, the modified separators with 20 wt% NTP (PP@PHNTP‐20) endow Cu||Li batteries with an excellent average Coulombic efficiency of ≈99%. Furthermore, the long‐term reversible Li plating/stripping can be achieved in the Li symmetric battery, and the LiFePO4 (LFP) ||Li batteries with PP@PHNTP‐20 present high capacity retention and improved C‐rate performance in a carbonate‐based electrolyte without additives.

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“…The methods used to form the PL include blade casting, [ 91,98,99 ] and spin‐coating, [ 86,100,101 ] which are simple and low‐cost. Of these, spin‐coating ( Figure a) is an effective method to prepare a thin and uniform film by dropping the slurry on a substrate on a rotating plate.…”

Section: How To Prepare a Protective Layermentioning

confidence: 99%

A Protective Layer for Lithium Metal Anode: Why and How

et al. 2021

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Lithium metal is the most promising candidate anode material for high energy density batteries, but its high activity and severe dendrite growth lead to safety concerns and limit its practical use. Constructing a protective layer (PL) on the lithium surface to avoid the side reactions and stabilize the electrode‐electrolyte interface is an effective approach to solve these problems. In this review, the recent progress on PLs is summarized, and their desired properties and design principles are discussed from the aspects of materials selection and the corresponding fabrication methods. Advanced PLs with different properties are then highlighted, including a self‐adjusting feature to increase structural integrity, the synergistic effect of organic and inorganic hybrids to improve mechanical properties and ionic conductivity, the use of embedded groups and ion diffusion channels to regulate ion distribution and flux, and a protective barrier to suppress corrosion from humid air or water. Finally, the remaining challenges and the possible solutions for PL design in future studies are proposed.

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Batteries: High Dielectric, Robust Composite Protective Layer for Dendrite‐Free and LiPF₆ Degradation‐Free Lithium Metal Anode (Adv. Funct. Mater. 48/2019)

Cited by 7 publications

References 0 publications

Grain‐Boundary‐Rich Artificial SEI Layer for High‐Rate Lithium Metal Anodes

Grain‐Boundary‐Rich Artificial SEI Layer for High‐Rate Lithium Metal Anodes

Regulating Lithium Deposition Behaviors by Functional PVDF‐HFP/NaTi₂(PO₄)₃ Composite Separator

A Protective Layer for Lithium Metal Anode: Why and How

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Batteries: High Dielectric, Robust Composite Protective Layer for Dendrite‐Free and LiPF6 Degradation‐Free Lithium Metal Anode (Adv. Funct. Mater. 48/2019)

Cited by 7 publications

References 0 publications

Grain‐Boundary‐Rich Artificial SEI Layer for High‐Rate Lithium Metal Anodes

Grain‐Boundary‐Rich Artificial SEI Layer for High‐Rate Lithium Metal Anodes

Regulating Lithium Deposition Behaviors by Functional PVDF‐HFP/NaTi2(PO4)3 Composite Separator

A Protective Layer for Lithium Metal Anode: Why and How

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Product

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Batteries: High Dielectric, Robust Composite Protective Layer for Dendrite‐Free and LiPF₆ Degradation‐Free Lithium Metal Anode (Adv. Funct. Mater. 48/2019)

Regulating Lithium Deposition Behaviors by Functional PVDF‐HFP/NaTi₂(PO₄)₃ Composite Separator