Multilayered Solid Polymer Electrolytes with Sacrificial Coating for Suppressing Lithium Dendrite Growth

2021 ◽  
Author(s):  
Xiaowei Li ◽  
Yongwei Zheng ◽  
William R. Fullerton ◽  
Christopher Y. Li
Keyword(s):  
Polymer Electrolytes ◽  
Dendrite Growth ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Lithium Dendrite

Reactivity-Guided Formulation of Composite Solid Polymer Electrolytes for Superior Sodium Metal Batteries

2021 ◽  
Author(s):  
Edward Matios ◽  
Huan Wang ◽  
Yiwen Zhang ◽  
Jianmin Luo ◽  
Chuanlong Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Dendrite Growth ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Safety Concerns ◽  
Sodium Metal ◽  
Solid State Electrolytes ◽  
Composite Solid

Solid-state electrolytes (SSEs) can effectively address the dendrite growth and safety concerns associated with current battery technologies, but their implementation is still plagued by low ionic conductivity and high interfacial...

Novel conducting solid polymer electrolytes with zwitterion structure boosting ionic conductivity and retarding lithium dendrite formation

2021 ◽  
Author(s):  
Muhammad Irfan ◽  
Yunlong Zhang ◽  
Zeheng Yang ◽  
Jianhui Su ◽  
Weixin Zhang
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Cell Polarization ◽  
Solid Polymer Electrolytes ◽  
Cycle Life ◽  
Solid Polymer ◽  
Internal Cell ◽  
Lithium Dendrite ◽  
And Performance ◽  
The Stability

Suppressing the anionic mobility in solid polymer electrolytes (SPEs) is crucial to mitigate the ionic conductivity, internal cell polarization and performance, and thus upgrading the stability and cycle life of...

scholarly journals Stabilizing Lithium Metal Anode by Ion Depletion-Induced Phase Transformation in Polymer Electrolytes

2021 ◽  
Author(s):  
Qian Cheng ◽  
yupeng miao ◽  
Zhe Liu ◽  
James Borovilas ◽  
Hanrui Zhang ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Polymer Electrolytes ◽  
Stimulated Raman Scattering ◽  
Dendrite Growth ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Metal Anode ◽  
Electrolyte Interface ◽  
Lithium Metal Anode ◽  
Ion Depletion

Ion depletion in liquid electrolytes is widely accepted to promote dendrite growth in metal anodes due to enhanced local electrical field and magnified concentration fluctuation at the electrode/electrolyte interface. Here we report unexpected opposite behaviors in solid polymer electrolytes, showing that ion depletion leads to uniform lithium deposition. Such stabilization originates from ion depletion-induced phase transformation, which forms a new PEO-rich but salt/plasticizer-poor phase at the lithium/electrolyte interface, as unveiled by stimulated Raman scattering microscopy. This new phase leads a significantly higher Young’s modulus (~2-3 GPa) than the bulk polymer electrolyte (< 10 MPa), which effectively suppresses dendrite growth. Further battery tests show that LiFePO<sub>4</sub>/PEO/Li cells with such ion depletion-induced phase transformations can be reversibly cycled for 200 times, while cells without such transformation fail within only ten cycles, demonstrating the effectiveness of this strategy to stabilize the lithium anode.

scholarly journals Stabilizing Lithium Metal Anode by Ion Depletion-Induced Phase Transformation in Polymer Electrolytes

2021 ◽  
Author(s):  
Qian Cheng ◽  
yupeng miao ◽  
Zhe Liu ◽  
James Borovilas ◽  
Hanrui Zhang ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Polymer Electrolytes ◽  
Stimulated Raman Scattering ◽  
Dendrite Growth ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Metal Anode ◽  
Electrolyte Interface ◽  
Lithium Metal Anode ◽  
Ion Depletion

Ion depletion in liquid electrolytes is widely accepted to promote dendrite growth in metal anodes due to enhanced local electrical field and magnified concentration fluctuation at the electrode/electrolyte interface. Here we report unexpected opposite behaviors in solid polymer electrolytes, showing that ion depletion leads to uniform lithium deposition. Such stabilization originates from ion depletion-induced phase transformation, which forms a new PEO-rich but salt/plasticizer-poor phase at the lithium/electrolyte interface, as unveiled by stimulated Raman scattering microscopy. This new phase leads a significantly higher Young’s modulus (~2-3 GPa) than the bulk polymer electrolyte (< 10 MPa), which effectively suppresses dendrite growth. Further battery tests show that LiFePO<sub>4</sub>/PEO/Li cells with such ion depletion-induced phase transformations can be reversibly cycled for 200 times, while cells without such transformation fail within only ten cycles, demonstrating the effectiveness of this strategy to stabilize the lithium anode.

Single lithium-ion conducting solid polymer electrolytes: advances and perspectives

2017 ◽  
Vol 46 (3) ◽  
pp. 797-815 ◽  
Author(s):  
Heng Zhang ◽  
Chunmei Li ◽  
Michal Piszcz ◽  
Estibaliz Coya ◽  
Teofilo Rojo ◽  
...  
Keyword(s):  
Growth Rate ◽  
Lithium Batteries ◽  
Polymer Electrolytes ◽  
Detrimental Effect ◽  
Lithium Ion ◽  
Transference Number ◽  
Dendrite Growth ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Ion Conducting

Single lithium-ion conducting solid polymer electrolytes (SLIC-SPEs), with a high lithium-ion transference number, the absence of the detrimental effect of anion polarization, and low dendrite growth rate, could be an excellent choice of safe electrolyte materials for lithium batteries in the future.

Siloxane Diacrylate-based All-Solid Polymer Electrolytes for Lithium Batteries

2015 ◽  
Vol 2 (1) ◽  
pp. 23-27
Author(s):  
Jijeesh Nair ◽  
◽  
Matteo Destro ◽  
Claudio Gerbaldi ◽  
Federico Bella
Keyword(s):  
Lithium Batteries ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer

Solid Polymer Electrolytes from Crosslinked PEG and Dilithium N,N'-Bis(trifluoromethanesulfonyl)perfluoroalkane-1,ω-disulfonamide and Lithium Bis(trifluoromethanesulfonyl)imide Salts

2008 ◽  
Vol 73 (12) ◽  
pp. 1777-1798 ◽  
Author(s):  
Olt E. Geiculescu ◽  
Rama V. Rajagopal ◽  
Emilia C. Mladin ◽  
Stephen E. Creager ◽  
Darryl D. Desmarteau
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Minimum Energy ◽  
Ionic Conductivities ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Segmental Motion ◽  
Concentrated Electrolytes ◽  
Two Factors ◽  
Poly Ethylene

The present work consists of a series of studies with regard to the structure and charge transport in solid polymer electrolytes (SPE) prepared using various new bis(trifluoromethanesulfonyl)imide (TFSI)-based dianionic dilithium salts in crosslinked low-molecular-weight poly(ethylene glycol). Some of the thermal properties (glass transition temperature, differential molar heat capacity) and ionic conductivities were determined for both diluted (EO/Li = 30:1) and concentrated (EO/Li = 10:1) SPEs. Trends in ionic conductivity of the new SPEs with respect to anion structure revealed that while for the dilute electrolytes ionic conductivity is generally rising with increased length of the perfluoroalkylene linking group in the dianions, for the concentrated electrolytes the trend is reversed with respect to dianion length. This behavior could be the result of a combination of two factors: on one hand a decrease in dianion basicity that results in diminished ion pairing and an enhancement in the number of charge carriers with increasing fluorine anion content, thereby increasing ionic conductivity while on the other hand the increasing anion size and concentration produce an increase in the friction/entanglements of the polymeric segments which lowers even more the reduced segmental motion of the crosslinked polymer and decrease the dianion contribution to the overall ionic conductivity. DFT modeling of the same TFSI-based dianionic dilithium salts reveals that the reason for the trend observed is due to the variation in ion dissociation enthalpy, derived from minimum-energy structures, with respect to perfluoroalkylene chain length.

Solar photoelectrochemical synthesis of electrolyte-free H2O2 aqueous solution without needing electrical bias and H2

2021 ◽  
Author(s):  
Tae Hwa Jeon ◽  
Bupmo Kim ◽  
Chuhyung Kim ◽  
Chuan Xia ◽  
Haotian Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
External Bias ◽  
Electrical Bias

An external bias-free photoelectrochemical system containing solid polymer electrolytes achieves efficient and durable synthesis of pure (electrolyte-free) aqueous H2O2 solution.

scholarly journals Thermal and Electrochemical Properties of Solid Polymer Electrolytes Prepared via Lithium Salt-Catalyzed Epoxide Ring Opening Polymerization

2021 ◽  
Vol 11 (4) ◽  
pp. 1561
Author(s):  
Gabrielle Foran ◽  
Nina Verdier ◽  
David Lepage ◽  
Arnaud Prébé ◽  
David Aymé-Perrot ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Polymer Electrolytes ◽  
Ring Opening ◽  
Lithium Salt ◽  
Ring Opening Polymerization ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Polymerization Reaction ◽  
Epoxide Ring ◽  
Epoxide Ring Opening

Solid polymer electrolytes have been widely proposed for use in all solid-state lithium batteries. Advantages of polymer electrolytes over liquid and ceramic electrolytes include their flexibility, tunability and easy processability. An additional benefit of using some types of polymers for electrolytes is that they can be processed without the use of solvents. An example of polymers that are compatible with solvent-free processing is epoxide-containing precursors that can form films via the lithium salt-catalyzed epoxide ring opening polymerization reaction. Many polymers with epoxide functional groups are liquid under ambient conditions and can be used to directly dissolve lithium salts, allowing the reaction to be performed in a single reaction vessel under mild conditions. The existence of a variety of epoxide-containing polymers opens the possibility for significant customization of the resultant films. This review discusses several varieties of epoxide-based polymer electrolytes (polyethylene, silicone-based, amine and plasticizer-containing) and to compare them based on their thermal and electrochemical properties.

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