Stabilizing lithium metal anode by molecular beam epitaxy grown uniform and ultrathin bismuth film

Chen, Tao; Meng, Fanbo; Zhang, Zewen; Liang, Junchuan; Hu, Yi; Kong, Weihua; Zhang, Xiao Li; Jin, Zhong

doi:10.1016/j.nanoen.2020.105068

Cited by 55 publications

(32 citation statements)

References 45 publications

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“…The Li 2 CO 3 species is brittle and poor in ionic conductivity, which is derived from the electrolyte decomposition. [ 50,51 ] Similar results can be also obtained from the S 2p XPS spectra, which show the more decomposition of the products of TFSI − in the bare Li than those in the Li@UCLN (Figure S11c,d, Supporting Information). Moreover, the interfacial composition of Li@UCLN maintains consistency before and after cycling (Figure S12, Supporting Information), further suggesting the structural integrity of the UCLN film during cycling.…”

Section: Resultssupporting

confidence: 75%

Robust Artificial Solid‐Electrolyte Interfaces with Biomimetic Ionic Channels for Dendrite‐Free Li Metal Anodes

Jiang

et al. 2020

Advanced Energy Materials

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A robust artificial solid electrolyte interphase (SEI) film with biomimetic ionic channels and high stability is rationally designed and fabricated by combining the ClO4−‐decorated metal‐organic framework (UiO‐66‐ClO4) and flexible lithiated Nafion binder (Li‐Nafion). The high electronegativity and lithiophilicity of ClO4− groups chemically anchored into the UiO‐66 channels endow the SEI film with an excellent single‐ion conducting pathway, high Li+ transference number, and outstanding ionic conductivity, which can effectively prohibit undesirable reactions of the Li metal with the electrolyte and regulate fast and uniform Li+ flux. With further assistance of the flexible Li‐Nafion binder, the resulting UiO‐66‐ClO4/Li‐Nafion (UCLN) composite film exhibits an excellent mechanical strength to suppress the growth of Li dendrites and maintain the integral stability of the Li metal anodes during cycling. Consequently, the UCLN coated Li metal anodes (Li@UCLN) deliver remarkable cycling stabilities even under a high current density of up to 20 mA cm−2 and large areal capacity of up to 30 mAh cm−2, as well as enhanced rate capacities and cycle lifespans in the full cells even under the harsh conditions for high‐energy density applications.

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Section: Resultssupporting

confidence: 75%

Robust Artificial Solid‐Electrolyte Interfaces with Biomimetic Ionic Channels for Dendrite‐Free Li Metal Anodes

Jiang

et al. 2020

Advanced Energy Materials

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“…Compared with traditional rechargeable lithium batteries using liquid organic electrolyte, solid-state lithium batteries have become the first choice for the next-generation power and energy storage batteries due to their safety and potential high specific energy [1], are widely used in electric vehicles, consumer electronics, and other fields. The preparation methods of solid-state battery electrodes and electrolytes are mainly Radio Frequency Magnetron Sputtering Deposition (RFMSD) [2], Pulsed Laser Deposition (PLD) [3], Electron Beam Evaporation (EBE) [4], Chemical Vapor Deposition (CVD) [5], Molecular Beam Epitaxy (MBE) [6] and other methods [7]. However, these methods are not conducive to the high-efficiency preparation of macroscopic large-capacity lithium solid-state batteries used in electric vehicles.…”

Section: Introductionmentioning

confidence: 99%

Structural evolution of plasma sprayed amorphous Li4Ti5O12 electrode and ceramic/polymer composite electrolyte during electrochemical cycle of quasi-solid-state lithium battery

Liang

Zhang

et al. 2020

Preprint

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Solid-state batteries are one of the effective way to solve the safety of traditional power and energy storage batteries with flammable liquid electrolyte. This time, a quasi-solid-state lithium battery is assembled by plasma sprayed amorphous Li 4 Ti 5 O 12 (LTO) electrode and ceramic/polymer composite electrolyte with a little liquid electrolyte (10 μl/cm 2 ) to provide the outstanding electrochemical stability and better than normal interface contact. SEM, STEM, TEM and EDS were used to analyze the structure evolution and performance of plasma sprayed amorphous LTO electrode and ceramic/polymer composite electrolyte before and after electrochemical experiments. By comparing the electrochemical performance of the amorphous LTO electrode and the traditional LTO electrode, the electrochemical behavior of different electrodes is studied. The results show that plasma spraying can prepare an amorphous Li 4 Ti 5 O 12 electrode coating of about 8 μm. After 200 electrochemical cycles, the structure of the electrode evolved, and the inside of the electrode fractured and cracks expanded, because of recrystallization at the interface between the rich fluorine compounds and the amorphous LTO electrode. Similarly, the ceramic/polymer composite electrolyte has undergone structural evolution after 200 cycles test. The electrochemical cycle results show that the cycle stability, capacity retention rate, coulomb efficiency, and internal impedance of amorphous LTO electrodes are better than traditional LTO electrode. This innovative and facile quasi-solid-state strategy is aimed to promote the intrinsic safety and stability of working lithium battery, shedding light on the development of next-generation high-performance solid-state lithium batteries.

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“…In contrast, the force responses in EP-based electrolyte include linear elastic region and slope change region. The slope change region was induced by perfectly plastic process or hardening process, possibly because of fracture and tip sliding [ 45 ]. The irreversible plastic deformation will ruin surface morphology, while elastic deformation contributes to reliving strain and maintaining integrity during potassiation–depotassiation process [ 25 ].…”

Section: Resultsmentioning

confidence: 99%

In Situ Monitoring the Potassium-Ion Storage Enhancement in Iron Selenide with Ether-Based Electrolyte

Zhuo

et al. 2021

Nano-Micro Lett.

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As one of the promising anode materials, iron selenide has received much attention for potassium-ion batteries (KIBs). Nevertheless, volume expansion and sluggish kinetics of iron selenide result in the poor reversibility and stability during potassiation–depotassiation process. In this work, we develop iron selenide composite matching ether-based electrolyte for KIBs, which presents a reversible specific capacity of 356 mAh g−1 at 200 mA g−1 after 75 cycles. According to the measurement of mechanical properties, it is found that iron selenide composite also exhibits robust and elastic solid electrolyte interphase layer in ether-based electrolyte, contributing to the improvement in reversibility and stability for KIBs. To further investigate the electrochemical enhancement mechanism of ether-based electrolyte in KIBs, we also utilize in situ visualization technique to monitor the potassiation–depotassiation process. For comparison, iron selenide composite matching carbonate-based electrolyte presents vast morphology change during potassiation–depotassiation process. When changing to ether-based electrolyte, a few minor morphology changes can be observed. This phenomenon indicates an occurrence of homogeneous electrochemical reaction in ether-based electrolyte, which results in a stable performance for potassium-ion (K-ion) storage. We believe that our work will provide a new perspective to visually monitor the potassium-ion storage process and guide the improvement in electrode material performance.

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Stabilizing lithium metal anode by molecular beam epitaxy grown uniform and ultrathin bismuth film

Cited by 55 publications

References 45 publications

Robust Artificial Solid‐Electrolyte Interfaces with Biomimetic Ionic Channels for Dendrite‐Free Li Metal Anodes

Robust Artificial Solid‐Electrolyte Interfaces with Biomimetic Ionic Channels for Dendrite‐Free Li Metal Anodes

Structural evolution of plasma sprayed amorphous Li4Ti5O12 electrode and ceramic/polymer composite electrolyte during electrochemical cycle of quasi-solid-state lithium battery

In Situ Monitoring the Potassium-Ion Storage Enhancement in Iron Selenide with Ether-Based Electrolyte

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