Highly stable lithium plating by a multifunctional electrolyte additive in a lithium-sulfurized polyacrylonitrile battery

Shuai, Yi; Zhang, Zeping; Chen, Kanghua; Lou, Jin; Yu, Weichao

doi:10.1039/c8cc09372e

Cited by 34 publications

(25 citation statements)

References 22 publications

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“…LKNO||LKNO and Li||Li symmetric cells were then assembled and cycled at 1 mA cm −2 and 1 mA h cm −2 (Figure 4C). Supported by the enhanced charge transfer kinetics through the interface, the LKNO electrode showed flat and smooth voltage profiles with low overpotential (~0.06 V after 400 h) in sharp contrast to ~0.18 V of pure Li electrode after 300 h. The sustained release of KNO 3 from LKNO into electrolyte ensured dynamic repairing of SEI by NO 3 − and dense Li plating due to the electrostatic shield of K + during long‐term cycling 26,31,32 . As a comparison, a fast increase of voltage polarization occurred for pure Li electrode.…”

Section: Resultsmentioning

confidence: 93%

“…Experimental results revealed that KNO 3 in the LKNO composite could be released into the electrolyte and remained as a stable component on cycling, which could dynamically repair the SEI and stabilize the Li metal electrode on cycling. Importantly, K + from KNO 3 could adsorb on the protrusions of the electrode to form an electrostatic shield and suppress the dendritic growth 31,32 . With these advantages, stable cycling in both LKNO||LKNO symmetric cells and LKNO||LiNi 0.6 Mn 0.2 Co 0.2 O 2 (LKNO||NCM) full cells with high cathode loading (~15 mg cm –2 ) were realized.…”

Section: Introductionmentioning

confidence: 99%

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Insights on “nitrate salt” in lithium anode for stabilized solid electrolyte interphase

Wang

Chen

et al. 2022

Carbon Energy

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A Li/KNO3 composite (LKNO), with KNO3 uniformly implanted in bulk metallic Li, is fabricated for battery anode via a facile mechanical kneading approach, which exhibits high Coulombic efficiency and prolonged cycle life. The mechanism behind the enhanced electrochemical performance of the “salt‐in‐metal” composite is investigated, where KNO3 in metallic Li composite electrode would be sustainably released into the electrolyte. The presence of NO3– stabilizes the solid electrolyte interphase by producing functional Li3N, LiNxOy, and Li2O species. K+ from KNO3 also helps to form an electrostatic shield after its adsorption on the electrode protrusions, which suppresses the dendritic growth of metallic Li. With the above advantages, uniform Li plating with dense and planar structure is realized for the LKNO electrode. These findings reveal a deep understanding of the effect of the “salt‐in‐metal” anode and provide new insights into the use of nitrate additives for high‐energy‐density Li metal batteries.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Insights on “nitrate salt” in lithium anode for stabilized solid electrolyte interphase

Wang

Chen

et al. 2022

Carbon Energy

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“…It is favorable to form the Li nucleus rapidly, rather than large Li dendrites. [ 6 ] Generally, electrolyte additives can contribute to the formation of robust SEI film by increasing the content of some inorganic component with high ionic conductivity and low electronic conductivity, for example, LiF and Li x S n ( n > 4) , [ 26–28 ] which have been demonstrated to contribute the formation of high‐quality SEI for enhancing the performance of LMBs. Li 3 P, as one of the fast Li + conductors (≈10 −4 S cm −1 at ambient temperature), is an ideal inorganic component of SEI film, [ 29 ] which has been proved by Qian and Goodenough's groups, respectively.…”

Section: Introductionmentioning

confidence: 99%

Phosphonium Bromides Regulating Solid Electrolyte Interphase Components and Optimizing Solvation Sheath Structure for Suppressing Lithium Dendrite Growth

Liu

et al. 2020

Adv Funct Materials

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Electrolyte additives play important roles in suppressing lithium dendrite growth and improving the electrochemical performance of long‐life lithium metal batteries (LMBs), however, it is still challenging to design individual additive for adjusting the solid electrolyte interphase (SEI) components and changing lithium ion solvation sheath in the electrolyte at the same time for optimizing electrochemical performance. Herein, alkyl‐triphenyl‐phosphonium bromides (alkyl‐TPPB) are designed as the electrolyte additive to enhance the stability of metallic Li anode under the guidance of multi‐factor principle for electrolyte additive molecule design (EDMD). Both alkyl‐TPP cations and Br− anions produce positive influences on suppressing Li dendrite growth and stabilizing the unstable interphase between metallic Li anode/electrolyte. As expected, the optimized solvation sheath structure, and the stable SEI suppress Li dendrite growth. As a result, the Li||Li4Ti5O12 cell reveals a long stable life over 1000 cycles with high Coulombic efficiency (99.9%). This work provides an insight on stabilizing SEI and optimizing solvation sheath structure with novel approach to develop long‐term stability and safety LMBs.

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“…Many methods have been developed to enhance the quality of SEI film via adopting electrolyte additives to stabilize it [5][6][7][8][9] or constructing artificial SEI film on the surface of Li metal to inhibit the growth of Li dendrites and realize uniform deposition of Li metal [10][11][12][13][14]. Frankly speaking, the modified SEI cannot guarantee a perfect cycling performance, because the huge volume fluctuation of the Li anode in the process of charging/ discharging has not been solved [15].…”

Section: Introductionmentioning

confidence: 99%

LixCu alloy nanowires nested in Ni foam for highly stable Li metal composite anode

et al. 2021

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Porous metal architectures are widely adopted as three-dimensional conducting scaffolds for constructing Li metal composite anodes, whereas their macropores hinder their practical application due to limited surface area and large pore size of few hundred micrometers. In this work, a network of Li x Cu solid solution alloy nanowires is in situ formed via infiltrating molten Li-Cu alloy into Ni foam and subsequent cooling treatment, whereby a three-component composite anode consisting of Li metal, Li x Cu alloy, and Ni foam is fabricated. The Li x Cu nanowires nested as secondary frame split the macropores into micropores, enlarging the active surface area and inducing uniform Li deposition significantly. The lithiophilicity of the alloy wires and the shrunken void size built by the hierarchical architecture can further tune the nucleation and growth behavior of Li. The multiscale synergetic effect between the primary and secondary scaffold guarantees the composite anode sheet with extraordinarily long-term cycling stability even under high current rates.

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Highly stable lithium plating by a multifunctional electrolyte additive in a lithium-sulfurized polyacrylonitrile battery

Abstract: The formation of lithium dendrites is recognized as the worst problem for lithium metal batteries.

Cited by 34 publications

References 22 publications

Insights on “nitrate salt” in lithium anode for stabilized solid electrolyte interphase

Insights on “nitrate salt” in lithium anode for stabilized solid electrolyte interphase

Phosphonium Bromides Regulating Solid Electrolyte Interphase Components and Optimizing Solvation Sheath Structure for Suppressing Lithium Dendrite Growth

LixCu alloy nanowires nested in Ni foam for highly stable Li metal composite anode

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