Protecting lithium/sodium metal anode with metal-organic framework based compact and robust shield

Qian, Jiasheng; Liu, Yu; Zhang, Menglu; Luo, Rui; Wang, Fujie; Ye, Yusheng; Xing, Yi; Li, Wanlong; Qu, Wenjie; Wang, Lili; Li, Li; Li, Yuejiao; Wu, Feng; Chen, Renjie

doi:10.1016/j.nanoen.2019.04.030

Cited by 119 publications

(85 citation statements)

References 41 publications

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“…Contact angle test results (Figure S9, Supporting Information) show that the COF‐Li has better infiltration of electrolyte solution than the polished Li, because the porous structure of the COF is good for the penetration of electrolyte, where the rapid Li + conduction is still carried by the liquid electrolyte (Figure S10, Supporting Information). On the other hand, COF layer with high affinity to Li + could sustain the uniformly distributed Li + flux across the surface of the Li metal anode, which helps alleviate Li dendrite growth 12a,19. The COF film on Li foil is also characterized by scanning electron microscopy (SEM).…”

Section: Resultsmentioning

confidence: 99%

In Situ Preparation of Thin and Rigid COF Film on Li Anode as Artificial Solid Electrolyte Interphase Layer Resisting Li Dendrite Puncture

Chen

Huang

Zhong

et al. 2019

Adv Funct Materials

147

134

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Metallic Li is considered the most promising anode material for high‐energy density batteries due to its high theoretical capacity and low electrochemical potential. However, commercialization of the Li anode has been hampered by the safety issue associated with Li‐dendrite growth resulting from uneven Li‐ion deposition and an unstable solid electrolyte interphase (SEI). Herein, an in situ prepared 10 nm thin film of covalent organic framework (COF) uniformly covered on the Li anode (COF‐Li) is used as an artificial SEI layer for Li plating/striping stabilization and Li dendrite inhibition. Abundant microcellular structures in the COF can redistribute the Li‐ion flux and lead to the homogeneous plating/stripping process. Meanwhile, the superhard mechanical properties and mechanical behavior during needling of the ultrathin COF film is studied via the digital pulsed force mode equipped in atomic force microscopy, illustrating a high Young's modulus of 6.8 GPa that is strong enough to resist dendrite growth. As a result, stable cycling for 400 h is achieved in the COF‐Li symmetrical cell at a current density of 1 mA cm−2, and the internal short circuit is effectively blocked by COF‐Li in Li–S batteries.

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Section: Resultsmentioning

confidence: 99%

In Situ Preparation of Thin and Rigid COF Film on Li Anode as Artificial Solid Electrolyte Interphase Layer Resisting Li Dendrite Puncture

Chen

Huang

Zhong

et al. 2019

Adv Funct Materials

147

134

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show abstract

“…Manipulating the interface between anode and electrolyte, for example by introducing an artificial SEI on top of the Na anode, is a commonly adopted strategy to increase the cycling stability of Na anodes …”

Section: Strategies For Efficient Use Of Na Metal Anodesmentioning

confidence: 99%

Design Strategies to Enable the Efficient Use of Sodium Metal Anodes in High‐Energy Batteries

et al. 2019

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Sodium-based batteries have attracted considerable attention and are recognized as ideal candidates for large-scale and low-cost energy storage. Sodium (Na) metal anodes are considered as one of the most promising anodes for next-generation, high-energy, Na-based batteries owing to their high theoretical specific capacity (1166 mA h g −1 ) and low standard electrode potential. Herein, an overview of the recent developments in Na metal anodes for high-energy batteries is provided. The high reactivity and large volume expansion of Na metal anodes during charge and discharge make the electrode/electrolyte interphase unstable, leading to the formation of Na dendrites, short cycle life, and safety issues. Design strategies to enable the efficient use of Na metal anodes are elucidated, including liquid electrolyte engineering, electrode/electrolyte interface optimization, sophisticated electrode construction, and solid electrolyte engineering. Finally, the remaining challenges and future research directions are identified. It is hoped that this progress report will shape a consistent view of this field and provide inspiration for future research to improve Na metal anodes and enable the development of high-energy sodium batteries.

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“…Although a freestanding film Ti 3 C 2 T x MXene can have an excellent conductivity of 15,000 S cm −1 or higher, a dense film with restacked 2D flakes is not favorable for fast Li migration, especially at high rates [19] . At high current density, Li may accumulate at certain locations and form dendrites because of uneven Li‐ion flux during Li plating and stripping [20–26] . Concentration polarization around Li dendrites results in fast consumption of the active Li and electrolyte [9,17,27] .…”

Section: Figurementioning

confidence: 99%

Interconnected Two‐dimensional Arrays of Niobium Nitride Nanocrystals as Stable Lithium Host

Xiao

Yao

Tang

et al. 2020

Batteries & Supercaps

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The cycle life of rechargeable lithium (Li)‐metal batteries is mainly restrained by dendrites growth on the Li‐metal anode and fast depletion of the electrolyte. Here, we report on a stable Li‐metal anode enabled by interconnected two‐dimensional (2D) arrays of niobium nitride (NbN) nanocrystals as the Li host, which exhibits a high Coulombic efficiency (>99 %) after 500 cycles. Combining theoretical and experimental analysis, it is inferred that this performance is due to the intrinsic properties of interconnected 2D arrays of NbN nanocrystals, such as thermodynamic stability against Li‐metal, high Li affinity, fast Li+ migration, and Li+ transport through the porous 2D nanosheets. Coupled with a lithium nickel–manganese–cobalt oxide cathode, full Li‐metal batteries were built, which showed high cycling stability under practical conditions – high areal cathode loading ≥4 mAh cm−2, low negative/positive (N/P) capacity ratio of 3, and lean electrolyte weight to cathode capacity ratio of 3 g Ah−1. Our results indicate that transition metal nitrides with a rationally designed structure may alleviate the challenges of developing dendrite‐free Li‐metal anodes.

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Protecting lithium/sodium metal anode with metal-organic framework based compact and robust shield

Cited by 119 publications

References 41 publications

In Situ Preparation of Thin and Rigid COF Film on Li Anode as Artificial Solid Electrolyte Interphase Layer Resisting Li Dendrite Puncture

In Situ Preparation of Thin and Rigid COF Film on Li Anode as Artificial Solid Electrolyte Interphase Layer Resisting Li Dendrite Puncture

Design Strategies to Enable the Efficient Use of Sodium Metal Anodes in High‐Energy Batteries

Interconnected Two‐dimensional Arrays of Niobium Nitride Nanocrystals as Stable Lithium Host

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