Stable Li metal anode by a polyvinyl alcohol protection layer via modifying solid-electrolyte interphase layer

Zhao, Yuming; Wang, Daiwei; Gao, Yue; Chen, Tianhang; Huang, Qingquan; Wang, Donghai

doi:10.1016/j.nanoen.2019.103893

Cited by 112 publications

(79 citation statements)

References 43 publications

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“…In addition, LiF can be generated via the interface reaction between PVDF and lithium , which can favor a stable SEI due to its high ionic conductivity, low diffusing energy and excellent mechanical strength. As a result, the dense and uniform deposition morphology reduces the possibility for the formation of dendritic lithium, and is beneficial to enhance the cycling stability and prolong the cell lifespan [24] . As illustrated in Figure 3j, the FTIR spectra of the modified coating at different states were investigated.…”

Section: Materials Advances Accepted Manuscriptmentioning

confidence: 99%

A binary PMMA/PVDF blend film modified substrate enables a superior lithium metal anode for lithium batteries

et al. 2021

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Section: Materials Advances Accepted Manuscriptmentioning

confidence: 99%

A binary PMMA/PVDF blend film modified substrate enables a superior lithium metal anode for lithium batteries

et al. 2021

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“…In order to have a deeper understanding of the electrochemical performance of the coin cell with composite precast SEI membrane prepared in the paper, and its level in this field, Table 1 summarizes other literature reports, using similar materials, and preparing them by the same methods. [44][45][46][47][48][49][50][51][52] The performance of the coin cell assembled by the artificial SEI film was comprehensively compared. It can be seen from the table that after preparing composite precast SEI membranes with PVDF-HFP, LiBOB, SiC, and PEO, the coin cell cycle number and Coulombic efficiency have more excellent performance.…”

Section: Cycle Performance Of Pvdf-hfp@cumentioning

confidence: 99%

Study on modification and failure of precast solid electrolyte interface film on Li metal anodes

et al. 2021

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Lithium (Li) metal anodes can be inevitably corroded and destructed due to the direct contact with the liquid electrolyte. Here, a precast solid electrolyte interface (SEI) film is constructed based on poly(vinylidene-co-hexafluoropropylene) (PVDF-HFP) matrix on a copper current collector to avoid side reactions between Li and electrolytes and further prevent dendrites growth. Lithium bis(oxalato) borate (LiBOB), SiC, and polyethylene oxide (PEO) are rationally hybridized, and their effects on the morphology, composition, strength, and other properties of the precast SEI film are studied through both physical and electrochemical characterizations. Due to the addition of LiBOB, SiC, and PEO, the structure and properties of the PVDF-HFP matrix have undergone a distinct change, which affects the cycle stability of the substrate. As a result, the cycling lifetime of the SEI film is increased from 61 to 295 cycles after adding an appropriate amount of LiBOB to the PVDF-HFP. Furthermore, the Li metal anode delivers a significantly improved life-span of 452 cycles at 1.0 mAÁcm −2 , 1.0 mAhÁcm −2 by virtue of the robust SEI with SiC and PEO added. Meantime, the Coulombic efficiency of the cell has also increased from 95.0% to more than 99.0%. The morphology and composition characterization results show that the SEI structure gradually collapses during cycling, which are found to arise from the formation of loosely connected Li 2 CO 3 , LiF, and dilapidated PVDF-HFP mixture. The deteriorative artificial SEI also induces the disconnected electrical contact, and as such the impedance significantly increases, resulting in eventual failure of the Li metal anode.

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“…To enhance the stability of lithium metal anodes, methods have been introduced to protect the Li metal by constructing an artificial SEI layer using an ex situ method consisted of organic or inorganic materials. [47,[172][173][174][175][176][177][178] Ex situ SEI layer formation refers to the pre-forming of an artificial SEI layer on the lithium metal surface before assembling the cell.…”

Section: Ex Situ-formed Artificial Sei Layers: Enhancement Of Li-ionimentioning

confidence: 99%

Lithium Metal Interface Modification for High‐Energy Batteries: Approaches and Characterization

Lee

Song

Cho

et al. 2020

Batteries & Supercaps

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Rechargeable batteries have been a profoundly greater part of our lives than we could have ever imagined. The rechargeable Li‐ion batteries (LIBs) that have been developed for transport systems even put fossil fuels in the corner. However, state‐of‐the‐art Li‐ion batteries with graphite anodes are now approaching their theoretical specific energy limits, so they cannot meet the increasing demands of a range of portable electronics and large‐scale energy storage systems. Li metal is one of the most promising anode materials that could break through the energy density bottleneck of Li‐ion batteries due to its ultrahigh specific capacity and very low potential compared to other anode materials. Nonetheless, the direct use of Li metal in commercial battery systems has been hindered due to significant obstacles associated with it such as safety issues, corrosion from chemical reactions that occur inside the battery, or poor cycling performance. The fundamental reason for these problems is the dendritic growth of Li‐ions on the Li metal anode during cycling, as a result of the interfacial phenomena of Li metal and electrolytes. Modification of the Li metal interface with an electrolyte presents an efficient solution to solve these problems. In this review, the current challenges facing the development of Li metal anodes are presented in detail. The most recent advances in Li metal anodes using a controlled interface between the Li metal surface and an electrolyte are highlighted and an introduction on the synthesis and production methods for the application of high‐energy‐density battery systems such as Li‐oxygen (Li−O2), Li‐sulfur (Li−S), and Li metal batteries with high‐energy density cathodes is presented. Furthermore, the recent developments in the in situ/operando analysis tools adopted for the investigation of Li metal anodes such as the structural and chemical changes, dynamic properties, and solid–electrolyte interface (SEI) layer properties are described and summarized. Finally, some suggestions are given in the direction of the development of Li metal with artificial surface layers for use in future high‐energy batteries.

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Stable Li metal anode by a polyvinyl alcohol protection layer via modifying solid-electrolyte interphase layer

Cited by 112 publications

References 43 publications

A binary PMMA/PVDF blend film modified substrate enables a superior lithium metal anode for lithium batteries

A binary PMMA/PVDF blend film modified substrate enables a superior lithium metal anode for lithium batteries

Study on modification and failure of precast solid electrolyte interface film on Li metal anodes

Lithium Metal Interface Modification for High‐Energy Batteries: Approaches and Characterization

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