Fluorinated solid electrolyte interphase enables highly reversible solid-state Li metal battery

Fan, Xiulin; Ji, Xiao; Han, Fudong; Yue, Jie; Chen, Ji; Chen, Long; Deng, Tao; Jiang, Jianjun; Wang, Chunsheng

doi:10.1126/sciadv.aau9245

Cited by 627 publications

(484 citation statements)

References 49 publications

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“…3D. The Li/composite interfacial resistance decreased from 595 to 90 Ω cm 2 after 10 h, indicating the formation of a stable solid electrolyte interphase between the metallic Li anode and the composite electrolyte (32)(33)(34). A similar phenomenon of a decreased Li/composite interfacial resistance was also observed for the symmetric cell without the lithium plating-stripping process (SI Appendix, Fig.…”

Section: Resultssupporting

confidence: 63%

High-performance all-solid-state batteries enabled by salt bonding to perovskite in poly(ethylene oxide)

Chien

Shi

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

244

144

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Flexible and low-cost poly(ethylene oxide) (PEO)-based electrolytes are promising for all-solid-state Li-metal batteries because of their compatibility with a metallic lithium anode. However, the low room-temperature Li-ion conductivity of PEO solid electrolytes and severe lithium-dendrite growth limit their application in high-energy Li-metal batteries. Here we prepared a PEO/perovskite Li3/8Sr7/16Ta3/4Zr1/4O3 composite electrolyte with a Li-ion conductivity of 5.4 × 10−5 and 3.5 × 10−4 S cm−1 at 25 and 45 °C, respectively; the strong interaction between the F− of TFSI− (bis-trifluoromethanesulfonimide) and the surface Ta5+ of the perovskite improves the Li-ion transport at the PEO/perovskite interface. A symmetric Li/composite electrolyte/Li cell shows an excellent cyclability at a high current density up to 0.6 mA cm−2. A solid electrolyte interphase layer formed in situ between the metallic lithium anode and the composite electrolyte suppresses lithium-dendrite formation and growth. All-solid-state Li|LiFePO4 and high-voltage Li|LiNi0.8Mn0.1Co0.1O2 batteries with the composite electrolyte have an impressive performance with high Coulombic efficiencies, small overpotentials, and good cycling stability.

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Section: Resultssupporting

confidence: 63%

High-performance all-solid-state batteries enabled by salt bonding to perovskite in poly(ethylene oxide)

Chien

Shi

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

244

144

View full text Add to dashboard Cite

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“…The most pragmatic approach for this is to choose the same electrolyte material, or some derivative, in the cathode as in the electrolyte membrane. However, there are some reports where the interface between electrode and electrolyte membrane is mediated by either coating of the electrode active material powderor employing a material that is better suited to fulfilling the role of ion‐conductor within the electrode …”

Section: Progress and Challenges For Prototyping High Energy Sslbsmentioning

confidence: 99%

Toward High‐Energy‐Density Lithium Metal Batteries: Opportunities and Challenges for Solid Organic Electrolytes

et al. 2020

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.201905219.With increasing demands for safe, high capacity energy storage to support personal electronics, newer devices such as unmanned aerial vehicles, as well as the commercialization of electric vehicles, current energy storage technologies are facing increased challenges. Although alternative batteries have been intensively investigated, lithium (Li) batteries are still recognized as the preferred energy storage solution for the consumer electronics markets and next generation automobiles. However, the commercialized Li batteries still have disadvantages, such as low capacities, potential safety issues, and unfavorable cycling life. Therefore, the design and development of electromaterials toward high-energy-density, long-life-span Li batteries with improved safety is a focus for researchers in the field of energy materials. Herein, recent advances in the development of novel organic electrolytes are summarized toward solid-state Li batteries with higher energy density and improved safety. On the basis of new insights into ionic conduction and design principles of organic-based solid-state electrolytes, specific strategies toward developing these electrolytes for Li metal anodes, high-energy-density cathode materials (e.g., high voltage materials), as well as the optimization of cathode formulations are outlined. Finally, prospects for next generation solid-state electrolytes are also proposed.

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“…2020, 10,1903186 To understand the function of the Sb/Li 3 Sb skin layer, we analyzed the F 1s XPS spectra after initial full discharge of both samples. [49] When discharged to 0.5 V, i.e., the Sb skin layer had completely lithiated to Li 3 Sb, the C-F peak was still observed ( Figure S24, Supporting Information), suggesting that the Li 3 Sb completely catalyzed C-F to Li-F during the subsequent discharge. This result illustrates that the FEC in the electrolyte was completely converted to LiF, i.e., LiF-rich SEI, in the Sbcoated porous Ge electrode.…”

Section: Characterization Of Interfacementioning

confidence: 99%

Boosting Superior Lithium Storage Performance of Alloy‐Based Anode Materials via Ultraconformal Sb Coating–Derived Favorable Solid‐Electrolyte Interphase

Xiong

Zhou

et al. 2019

Advanced Energy Materials

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Alloy materials such as Si and Ge are attractive as high‐capacity anodes for rechargeable batteries, but such anodes undergo severe capacity degradation during discharge–charge processes. Compared to the over‐emphasized efforts on the electrode structure design to mitigate the volume changes, understanding and engineering of the solid‐electrolyte interphase (SEI) are significantly lacking. This work demonstrates that modifying the surface of alloy‐based anode materials by building an ultraconformal layer of Sb can significantly enhance their structural and interfacial stability during cycling. Combined experimental and theoretical studies consistently reveal that the ultraconformal Sb layer is dynamically converted to Li3Sb during cycling, which can selectively adsorb and catalytically decompose electrolyte additives to form a robust, thin, and dense LiF‐dominated SEI, and simultaneously restrain the decomposition of electrolyte solvents. Hence, the Sb‐coated porous Ge electrode delivers much higher initial Coulombic efficiency of 85% and higher reversible capacity of 1046 mAh g−1 after 200 cycles at 500 mA g−1, compared to only 72% and 170 mAh g−1 for bare porous Ge. The present finding has indicated that tailoring surface structures of electrode materials is an appealing approach to construct a robust SEI and achieve long‐term cycling stability for alloy‐based anode materials.

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Fluorinated solid electrolyte interphase enables highly reversible solid-state Li metal battery

Abstract: A principle of suppressing Li dendrite in solid-state electrolytes is proposed and demonstrated using LiF-rich SEI experimentally.

Cited by 627 publications

References 49 publications

High-performance all-solid-state batteries enabled by salt bonding to perovskite in poly(ethylene oxide)

High-performance all-solid-state batteries enabled by salt bonding to perovskite in poly(ethylene oxide)

Toward High‐Energy‐Density Lithium Metal Batteries: Opportunities and Challenges for Solid Organic Electrolytes

Boosting Superior Lithium Storage Performance of Alloy‐Based Anode Materials via Ultraconformal Sb Coating–Derived Favorable Solid‐Electrolyte Interphase

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