Polypyrrole Nanotube Sponge Host for Stable Lithium-Metal Batteries under Lean Electrolyte Conditions

Yao, Wei; He, Shuyan; Xu, Jianguang; Wang, Jinshan; He, Meng; Zhang, Qinfang; Li, Yao; Xiao, Xu

doi:10.1021/acssuschemeng.0c08338

Cited by 12 publications

(15 citation statements)

References 53 publications

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“…The chemistry components of SEI for different half‐cells were characterized by XPS (Figure S7). The SEI layer on Li foil for the Li||PEDOT/PP||Cu half‐cell is composed of ROCO 2 Li (R=alkyl groups) and LiF et al., in accord with previous reports [13,24] . As comparison.…”

Section: Resultssupporting

confidence: 87%

“…Another method has devoted to building artificial SEI such as MXenes, [18–19] rGO, [20] MoS 2 , [21] and Al 2 O 3 layer [22] on the surface of Li to suppress dendrite growth. Although the artificial SEI has high chemical stability and physical Young's modulus to avoid the fragility issue of SEI, their relatively poor ion/electron mobilities result in obviously increasing polarization voltage especially at a high current density (>2 mA cm −2 ) [23–24] . Additionally, the artificial SEI would compromise the final energy‐density of LMBs due to the high mass loading.…”

Section: Introductionmentioning

confidence: 99%

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Ultralight PEDOT Functionalized Separators toward High‐Performance Lithium Metal Anodes

Yao

Qiu

et al. 2021

ChemElectroChem

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The practical application of lithium‐metal batteries (LMBs) has been limited by the problems of uncontrolled lithium dendrite growth, resulting in a low Coulombic efficiency (CE) and rapid battery failure. Herein, we develop an ultralight poly(3, 4‐ethylenedioxythiophene) (PEDOT) modifying Celgard polypropylene (PP) separator with a mass loading of 0.08 mg cm2 by vapor phase polymerization. The increased affinity between the PEDOT/PP separator and electrolyte interface enables homogenous Li+ flux. Meanwhile, the lithiophilic thiophene functional groups of PEDOT guide uniform Li nucleation and growth through the formation of Li−S bond. As a result, dendrite‐free Li deposition has been achieved with a high CE of 98.0 % over 150 cycles and flat stable overpotential of ∼90 mV at an ultrahigh rate of 20 mA cm−2 in the symmetric cell. Remarkably, the Li||PEDOT/PP||LiNi0.8Co0.1Mn0.1O2 full cells demonstrate superior stability up to 500 cycles with a discharge capacity of 119 mAh g−1 at 1 C. This work paves way for modifying separator for high‐performance LMBs.

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Ultralight PEDOT Functionalized Separators toward High‐Performance Lithium Metal Anodes

Yao

Qiu

et al. 2021

ChemElectroChem

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“…Similar conclusions can be drawn from the F 1s spectra in Figure 4b, showing the drastically higher C−F content at 688.1 eV on PPHK@Cu. In the comparison of N 1s spectra (Figure 4c), the presence of prominent Li 3 N peaks at 398.8 eV on PPHK@Cu provided strong evidence for the cation‐π interaction between PPy and Li + [17b] . Li 3 N is known to have a highly ionic conductivity up to 6×10 3 S cm −1 and therefore allows fast Li + transport into/within the MOF channels [22] .…”

Section: Resultsmentioning

confidence: 99%

A “Blockchain” Synergy in Conductive Polymer‐Filled Metal–Organic Frameworks for Dendrite‐Free Li Plating/Stripping with High Coulombic Efficiency

et al. 2022

Angew Chem Int Ed

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The performance of lithium-metal batteries is severely hampered by uncontrollable dendrite growth and volume expansion on the metal anodes. Inspired by the "blockchain" concept in data mining, here we utilize a conductive polymer-filled metal-organic framework (MOF) as the lithium host, in which polypyrrole (PPy) serves as the "chain" to interlink Li "blocks" stored in the MOF pores. While the N-rich PPy guides fast Li + infiltration/extrusion and serves as the nucleation sites for isotropic Li growth, the MOF pores compartmentalize bulk Li deposition for 3D matrix Li storage, leading to low-barrier and dendrite-free Li plating/stripping with superb Coulombic efficiency. The asfabricated lithium-metal anodes operate over 700 cycles at 5 mA cm À 2 in symmetric cells, and 800 cycles at 1 C in full cells with a per-cycle capacity loss of only 0.017 %. This work might open a new chapter for Li-metal anode construction by introducing the concept of "blockchain" management of Li plating/stripping.

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“…Polypyrrole (PPy) is well known as a black conjugated conducting polymer, which exhibits broadband light absorption spectra, making it an excellent solar thermal material. , PPy has excellent chemical and thermal stabilities, and it is insoluble in water and other conventional solvents . Moreover, as PPy is electrically conductive, it has been widely explored in battery electrodes, supercapacitors, sensors, electrocatalysis, electromagnetic wave absorption, and other electricity-related fields. − Moreover, the morphology of PPy particles can be tuned from globular to fibrous by introducing dopamine (DA) in the reaction solvent, as demonstrated in previous reports. − DA is the main composition of adhesive proteins in mussels, displaying excellent interfacial adhesion properties on various substrates . It is worth mentioning that the self-polymer of DA, polydopamine (PDA), is black and insoluble, also exhibiting superior solar thermal conversion efficiency .…”

Section: Introductionmentioning

confidence: 99%

Polypyrrole–Dopamine Nanofiber Light-Trapping Coating for Efficient Solar Vapor Generation

Jia

Gao

et al. 2021

ACS Appl. Mater. Interfaces

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Solar vapor generation (SVG) typically uses a solar absorbing material at the water–air interface to convert solar energy into heat for evaporation. However, the intrinsic solar absorption of the material determines the upper limit of the solar energy capture. By designing a light-trapping surface structure with open pores and channels, we can break this limit and further improve the absorption by enabling multiple reflections within the surface. Polypyrrole (PPy) is emerging as a promising solar thermal material. In this work, we propose an ultrasonic spray coating method to obtain a nanofiber light-trapping coating by copolymerization with dopamine (DA), which can be directly synthesized at room temperature rapidly (30 min). Due to its excellent wettability, this coating can transport water and can be directly coated on the thermal insulating layer, not requiring an additional water transport layer. This nanoscale coating significantly improves solar absorption at different incident angles across the full solar spectrum, achieving the highest solar-to-thermal conversion efficiency of 95.8% at 1.385 kg·m–2·h–1 under 1 sun. When applied on salt water, this solar evaporator achieves self-cleaning in the absence of solar irradiation. Moreover, the surface structure can be further tuned into granular/plane–fibrous/plane–granular structures by using different oxidants or surfactants, and their formation mechanisms are also proposed. This PPy–DA nanofiber coating shows great potential for SVG and other applications based on a PPy material, especially for those requiring a certain surface morphology.

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Polypyrrole Nanotube Sponge Host for Stable Lithium-Metal Batteries under Lean Electrolyte Conditions

Cited by 12 publications

References 53 publications

Ultralight PEDOT Functionalized Separators toward High‐Performance Lithium Metal Anodes

Ultralight PEDOT Functionalized Separators toward High‐Performance Lithium Metal Anodes

A “Blockchain” Synergy in Conductive Polymer‐Filled Metal–Organic Frameworks for Dendrite‐Free Li Plating/Stripping with High Coulombic Efficiency

Polypyrrole–Dopamine Nanofiber Light-Trapping Coating for Efficient Solar Vapor Generation

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