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

Xiong, Xiaosong; Zhi, Ruoyu; Zhou, Qibing; Yan, Wei-Yong; Zhu, Yusong; Chen, Yuhui; Fu, Lijun; Yu, Nengfei; Wu, Yuping

doi:10.1039/d1ma00121c

Cited by 22 publications

(8 citation statements)

References 37 publications

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“…Besides, a binary PMMA/PVDF nanofibrous mat was also reported to coat the surface of Cu foil via in situ electrospinning and served as a modified protective layer in suppressing the growth of dendritic Li. 209 Although the use of 3D porous materials can effectively reduce the local current density at the collector surface, which thus inhibits the growth of lithium dendrites. However, the 3D porous collector without lithiophilic properties always leads to the deposition of lithium metal on the outside of the 3D porous structure rather than within the 3D pore voids, especially at high current density and large areal capacity deposition conditions.…”

Section: Current Collector Modificationmentioning

confidence: 99%

“…Benefiting from this particularly designed nano‐web protective layer, the as‐fabricated 3D‐web PVDF scaffold electrode was proved efficient in suppressing the dendritic growth of Li and therefore provided reliable Li plating/stripping reversibility at a high current density of 2.3 mA cm −2 . Besides, a binary PMMA/PVDF nanofibrous mat was also reported to coat the surface of Cu foil via in situ electrospinning and served as a modified protective layer in suppressing the growth of dendritic Li 209 …”

Section: Electrospinning Technique Toward Stable Lithium Metal Anodesmentioning

confidence: 99%

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Progress and perspectives on electrospinning techniques for solid‐state lithium batteries

Lei

Tang

Shao³

2022

Carbon Energy

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Solid‐state electrolytes (SSEs), being the key component of solid‐state lithium batteries, have a significant impact on battery performance. Rational materials structure and composition engineering on SSEs are promising to improve their Li+ conductivity, interfacial contact, and mechanical integrity. Among the fabrication approaches, the electrospinning technique has attracted tremendous attention due to its own merits in constructing a three‐dimensional framework of SSEs with precise porosity structure, tunable materials composition, easy operation, and superior physicochemical properties. To this end, in this review, we provide a comprehensive summary of the recent development of electrospinning techniques for high‐performance SSEs. Firstly, we introduce the historical development of SSEs and summarize the fundamentals, including the Li+ transport mechanism and materials selection principle. Then, the versatility of electrospinning technologies in the construction of the three main types of SSEs and stabilization of lithium metal anodes is comprehensively discussed. Finally, a perspective on future research directions based on previous work is highlighted for developing high‐performance solid‐state lithium batteries based on electrospinning techniques.

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Section: Current Collector Modificationmentioning

confidence: 99%

Section: Electrospinning Technique Toward Stable Lithium Metal Anodesmentioning

confidence: 99%

Progress and perspectives on electrospinning techniques for solid‐state lithium batteries

Lei

Tang

Shao³

2022

Carbon Energy

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“…In the past few decades, many methods have been developed to suppress the growth of Li dendrites, including the utilization of solid electrolytes, [ 7 ] anode structure design, [ 8,9 ] electrolyte modification, [ 10 ] and high‐concentration electrolytes, [ 11 ] etc. Among them, the strategy of the electrolyte modification by additive to stabilize the Li anode is considered to be an economical and practical method.…”

Section: Introductionmentioning

confidence: 99%

Separator‐Wetted, Acid‐ and Water‐Scavenged Electrolyte with Optimized Li‐Ion Solvation to Form Dual Efficient Electrode Electrolyte Interphases via Hexa‐Functional Additive

Liu

et al. 2022

Advanced Science

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The performance of lithium metal batteries (LMBs) is determined by many factors from the bulk electrolyte to the electrode‐electrolyte interphases, which are crucially affected by electrolyte additives. Herein, the authors develop the heptafluorobutyrylimidazole (HFBMZ) as a hexa‐functional additive to inhibit the dendrite growth on the surface of lithium (Li) anode, and then improve the cycling performance and rate capabilities of Li||LiNi0.6Co0.2Mn0.2O2 (NCM622). The HFBMZ can remove the trace H2O and HF from the electrolyte, reducing the by‐products on the surface of solid electrolyte interphase (SEI) and inhibiting the dissolution of metal ions from NCM622. Also, the HFBMZ can enhance the wettability of the separator to promote uniform Li deposition. HFBMZ can make Li+ easy to be desolvated, resulting in the increase of Li+ flux on Li anode surface. Moreover, the HFBMZ can optimize the composition and structure of SEI. Therefore, the Li||Li symmetrical cells with 1 wt% HFBMZ‐contained electrolyte can achieve stable cycling for more than 1200 h at 0.5 mA cm–2. In addition, the capacity retention rate of the Li||NCM622 can reach 92% after 150 cycles at 100 mA g–1.

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“…These problems may reduce the safety and stability of Li-metal batteries. [8][9][10] In recent years, a variety of methods for stabilizing Li-metal anodes, including adding additives to liquid electrolytes, [11][12][13] preparing artificial solid electrolyte interphase (SEI) films, [14][15][16] fabricating 3D composite Li-anode structure, [17][18][19][20][21] or using solid-state electrolytes (SSEs), [22][23][24] have been reported. Substantial progress has been indeed made in improving the stability and cycling performance of Li anodes.…”

Section: Introductionmentioning

confidence: 99%

“…[ 15 ] Xiao et al fabricated an artificial Li 4 Ti 5 O 12 ‐decorated copper foil, which formed a concentrated Li + ‐ion region in the electrode interface after the initial activation process that could effectively mitigate the effect of the spatial charge region produced by ion depletion on lithium‐dendrite growth. [ 21 ] Deng et al developed a core–shell structured composite Li‐metal anode with a thin layer of liquid alloy containing lithium as the shell. The SEI formed on the shell demonstrated excellent stability and durability, and could significantly improve the cycle life of batteries.…”

Section: Introductionmentioning

confidence: 99%

Designing Thermomechanical Stable Gel‐Polymer Electrolytes Mediated by Block‐Copolymer Nanofibers for Quasi‐Solid‐State Lithium Batteries

Guan

Liu

Jiao

et al. 2022

Adv Energy and Sustain Res

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Gel‐polymer electrolytes (GPEs) are expected to play an important role in the next‐generation quasi‐solid‐state lithium batteries (SSLBs), but they suffer from severe thermal and mechanical instability. Herein, a viscoelastic nanofibrous GPE film with high thermomechanical stability for constructing stable quasi‐SSLBs is reported. The GPE is fabricated by in situ polymerization of methyl acrylate in a blockcopolymer (PVDF‐b‐PTFE) nanofiber film followed by being immersed into the commercial liquid electrolytes and then dried. The tough blockcopolymer film shows high polarity that not only enhances the thermomechanical stability, but also promotes the dissociation of Li salts to release more free ions, thereby improving the ionic conductivity of GPE. As a result, the GPE shows high heat resistant to 150 °C, a wide electrochemical window of 5.1 V, and a high Li+‐ion transference number of 0.56. When matching high loading cathodes of LiFePO4 (13.36 mg cm−2) or NCM523 (12.25 mg cm−2), both kinds of batteries present high cycling stability and rate capability at 25 °C. More practically, the GPE can be used to construct soft pack batteries with high capacities, showing appealing application prospects.

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

Abstract: Metallic lithium is an promising next generation electrode material due to its ultrahigh specific capacity and the lowest potential. However, short cycling lifespan and safety hazards have hindered the practical...

Cited by 22 publications

References 37 publications

Progress and perspectives on electrospinning techniques for solid‐state lithium batteries

Progress and perspectives on electrospinning techniques for solid‐state lithium batteries

Separator‐Wetted, Acid‐ and Water‐Scavenged Electrolyte with Optimized Li‐Ion Solvation to Form Dual Efficient Electrode Electrolyte Interphases via Hexa‐Functional Additive

Designing Thermomechanical Stable Gel‐Polymer Electrolytes Mediated by Block‐Copolymer Nanofibers for Quasi‐Solid‐State Lithium Batteries

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