A dendrite-suppressing composite ion conductor from aramid nanofibres

Tung, Siu On; Ho, Szushen; Yang, Ming; Zhang, Ruilin; Kotov, Nicholas A.

doi:10.1038/ncomms7152

Cited by 295 publications

(208 citation statements)

References 37 publications

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“…Extensive research has highlighted the importance of mechanical properties in the design of separators and artificial SEI . Advanced separators (e.g., Kevlar nanofiber, Zylon nanofiber) or artificial SEI layers (e.g., Cu 3 N, double‐layered nanodiamond (ND) film, Li 3 PO 4 ) with high Young's modulus can efficiently restrain Li dendrite growth at the anode interface, which is also consistent with the theoretical work that dendrite proliferation can be suppressed once shear modulus of separators (or the artificial SEI layer) reaches 7 GPa . However, it is difficult to accommodate the huge volume fluctuation during operation of 2D Li‐metal foil that was modified with interface engineering.…”

supporting

confidence: 83%

Stable Li‐Metal Deposition via a 3D Nanodiamond Matrix with Ultrahigh Young's Modulus

et al. 2019

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The practical usage of high‐energy lithium metal batteries remains a great challenge mainly due to the formation of uneven lithium deposition and huge volume fluctuation on the anode side, which increases the potential risks of a cell short‐circuit. Herein, a nanodiamond‐Li composite anode (ND‐Li) is created using a facile thermal infusion strategy, which can mechanically confine active Li‐metal in the ND matrix and minimize the electrode volume change during electrochemical cycling with high areal capacities. The geometrically restrictive ND matrix with ultrahigh modulus can deform the uneven lithium deposition mechanically and confine the deposition to the ND matrix. Owing to the 3D rigid skeleton, low stripping/plating overpotential (≈60 mV) can be achieved for a ND‐Li anode under a high current density of 10 mA cm−2, whereas the overpotential of a bare Li foil anode is almost seven times larger than the ND‐Li matrix. When a ND‐Li anode pairs with a S cathode, a high capacity of 607.3 mAh g−1 at 1 C and stable long‐term cyclability over 500 cycles can be achieved.

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confidence: 83%

Stable Li‐Metal Deposition via a 3D Nanodiamond Matrix with Ultrahigh Young's Modulus

et al. 2019

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“…For example, the Young's modulus of vermiculite sheets is as high as 175 GPa, [49] which is sufficient to suppress the growth of Li dendrite by mechanical resistance. [2,24,35,37,[50][51][52] The tensile strength of SPE is doubled from 0.41 to 0.8 MPa after adding VS fillers (Figure 2c). Nanoindentation is an effective technique to evaluate materials' mechanical properties under indent at nanoscale and can mimic the punctuation of Li dendrites.…”

Section: Resultsmentioning

confidence: 99%

Simultaneously Enhancing the Thermal Stability, Mechanical Modulus, and Electrochemical Performance of Solid Polymer Electrolytes by Incorporating 2D Sheets

Tang

Zhang

et al. 2018

Advanced Energy Materials

248

178

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Solid state electrolytes are the key components for high energy density lithium ion batteries and especially for lithium metal batteries where lithium dendrite growth is an inevitable obstacle in liquid electrolytes. Solid polymer electrolytes based on a complex of polymers and lithium salts are intrinsically advantageous over inorganic electrolytes in terms of processability and film‐forming properties. But other properties such as ionic conductivity, thermal stability, mechanical modulus, and electrochemical stability need to be improved. Herein, for the first time, 2D additives using few‐layer vermiculite clay sheets as an example to comprehensively upgrade poly(ethylene oxide)‐based solid polymer electrolyte are introduced. With clay sheet additives, the polymer electrolyte exhibits improved thermal stability, mechanical modulus, ionic conductivity, and electrochemical stability along with reduced flammability and interface resistance. The composite polymer electrolyte can suppress the formation and growth of lithium dendrites in lithium metal batteries. It is anticipated that the clay sheets upgraded solid polymer electrolyte can be integrated to construct high performance solid state lithium ion and lithium metal batteries with higher energy and safety.

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“…Various strategies have been designed to prevent dendrite penetration and reduce dendrite structure, including the use of nanostructured anodes,5 modified separators,6 and physical protective layers 7. However, these strategies cannot change the breakage/repair mechanism of SEI layer, and significantly improve the Coulombic efficiency of Li plating/stripping.…”

mentioning

confidence: 99%

Passivation of Lithium Metal Anode via Hybrid Ionic Liquid Electrolyte toward Stable Li Plating/Stripping

et al. 2016

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Hybrid electrolyte of ionic liquid and ethers is used to passivate the surface of Li metal surface via modification of the as‐formed solid electrolyte interphase with N‐propyl‐N‐methylpyrrolidinium bis(trifluoromethanesulfonyl)amide (Py13TFSI), thereby reducing the side reactions between the Li metal and electrolyte, leading to remarkably suppressed Li dendrite growth and mitigating Li metal corrosion.

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A dendrite-suppressing composite ion conductor from aramid nanofibres

Cited by 295 publications

References 37 publications

Stable Li‐Metal Deposition via a 3D Nanodiamond Matrix with Ultrahigh Young's Modulus

Stable Li‐Metal Deposition via a 3D Nanodiamond Matrix with Ultrahigh Young's Modulus

Simultaneously Enhancing the Thermal Stability, Mechanical Modulus, and Electrochemical Performance of Solid Polymer Electrolytes by Incorporating 2D Sheets

Passivation of Lithium Metal Anode via Hybrid Ionic Liquid Electrolyte toward Stable Li Plating/Stripping

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