Supramolecular Self-Assembly of Methylated Rotaxanes for Solid Polymer Electrolyte Application

Imholt, Laura; Dong, Dengpan; Bedrov, Dmitry; Cekic‐Laskovic, Isidora; Winter, Martin; Brunklaus, Gunther

doi:10.1021/acsmacrolett.8b00406

Cited by 53 publications

(42 citation statements)

References 46 publications

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Section: Intermolecular Interaction To Increase Ionic Conductivitymentioning

confidence: 99%

“…Notably, M‐CD‐PEO/LiSbF 6 exhibited almost 2 orders of magnitude higher ionic conductivity and three times higher transport number compared to nonmodified complexes. Notably, LiFePO 4 /Li cell using M‐CD‐PEO electrolyte delivered fast cycling (1 C) and remarkable capacity retention of 95% after 200 cycles, indicating that the methoxy modification of CD effectively enhanced the flexibility of nanochannels.…”

Section: Intermolecular Interaction To Increase Ionic Conductivitymentioning

confidence: 99%

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Intermolecular Chemistry in Solid Polymer Electrolytes for High‐Energy‐Density Lithium Batteries

et al. 2019

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Solid polymer electrolytes (SPEs) have aroused wide interest in lithium batteries because of their sufficient mechanical properties, superior safety performances, and excellent processability. However, ionic conductivity and high‐voltage compatibility of SPEs are still yet to meet the requirement of future energy‐storage systems, representing significant barriers to progress. In this regard, intermolecular interactions in SPEs have attracted attention, and they can significantly impact on the Li+ motion and frontier orbital energy level of SPEs. Recent advances in improving electrochemcial performance of SPEs are reviewed, and the underlying mechanism of these proposed strategies related to intermolecular interaction is discussed, including ion–dipole, hydrogen bonds, π–π stacking, and Lewis acid–base interactions. It is hoped that this review can inspire a deeper consideration on this critical issue, which can pave new pathway to improve ionic conductivity and high‐voltage performance of SPEs.

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Section: Intermolecular Interaction To Increase Ionic Conductivitymentioning

confidence: 99%

Section: Intermolecular Interaction To Increase Ionic Conductivitymentioning

confidence: 99%

Intermolecular Chemistry in Solid Polymer Electrolytes for High‐Energy‐Density Lithium Batteries

et al. 2019

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“…To overcome the described issues, various approaches were developed based on electrolyte and lithium anode interphase engineering, [ 10 ] minimizing volume changes by using stable hosts, [ 11 ] and preventing dendrite formation and propagation by the use of solid‐state electrolytes. [ 12 ]…”

Section: Introductionmentioning

confidence: 99%

Galvanic Corrosion of Lithium‐Powder‐Based Electrodes

Kolesnikov

Kolek

Dohmann

et al. 2020

Advanced Energy Materials

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for anode materials to replace graphite [3] in lithium batteries. The application of thin lithium foils is considered to enable an increase in energy density by nearly a factor of 2 in case of solid-state lithium metal batteries (SSLMBs). [4] Besides LIB-derived cathode materials, lithium anodes are often considered for conversion-type cathodes enabling S 8 ||Li and O 2 ||Li batteries as well. [5] Nevertheless, lithium as anode material in rechargeable batteries has been extensively studied over four decades [6] and still no commercial application could be realized. [7] Major challenges concern the safety and uncontrolled lithium electrodeposition that often leads to the formation of high surface area lithium (HSAL), frequently called "dendrites." The high reactivity of pristine lithium and especially electrodeposited lithium leads to severe side reactions with electrolytes which result in the formation of a solid electrolyte interphase (SEI). [8] This SEI, however, is fractured during consecutive lithium electrodeposition and electrodissolution resulting in an inhomogeneous interphase on the lithium surface. These inhomogeneities can cause uncontrolled lithium electrodeposition and the formation of HSAL deposits. [9] Such deposits can occur in needle-like ( = dendritic) morphology and puncture the separator. After growing to the cathode, an internal short-circuit may be caused which dramatically increases the risk of a thermal runaway. To overcome the described issues, various approaches were developed based on electrolyte and lithium anode interphase engineering, [10] minimizing volume changes by using stable hosts, [11] and preventing dendrite formation and propagation by the use of solid-state electrolytes. [12] The stability of materials in contact with its environment is a well-known research area for corrosion science. Corrosion, in general, is defined as the chemical or electrochemical reaction between a material and its environment that results in a deterioration of the material and its properties. [13] As energy storage and conversion systems imply materials in a thermodynamically non-equilibrium state, corrosion-related processes are highly relevant for such systems. Figure 1a presents an overview of possible corrosion-related phenomena in a battery cell. Herein, we only discuss corrosion phenomena which occur in the presence of an electrolyte.At the positive electrode side, dissolution of Al, [14] which is typically used as a positive electrode current collector, and the cathode electrolyte interphase (CEI) [15] formation are phenomena related to corrosion in a battery cell (Figure 1b-d). One of the two processes which leads to dissolution of Al is Lithium metal is considered to be the most promising anode for the next generation of batteries if the issues related to safety and low coulombic efficiency can be overcome. It is known that the initial morphology of the lithium metal anode has a great influence on the cycling characteristics of a lithium metal battery (LMB). Lithium-powder-based el...

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“…[33][34][35] The prominent advantages of gel-type polymer electrolytes comprise superior ionic conductivity and lower electrolyteelectrode interfacial resistances compared to rather "dry" materials, despite the fact that substantial progress was achieved for "dry" polymer electrolytes in recent years. 8,13,[36][37][38][39] Notably, sufficient polymer exibility results either from incorporation of rather exible, linear polymer compounds into single ion conducting polymer structures or from blending of aromatic single ion conducting polymers (that tend to be brittle when fabricated as a self-standing membrane) with another polymer having a linear structure. 34 Previous reports indeed revealed the benecial characteristics of single ion conducting gel-type polymer electrolytes derived from aromatic polysulfonamide-based homopolymers composed of a Helmholtz-Institute Münster, IEK-12, Forschungszentrum Jülich, Corrensstr.…”

Section: Introductionmentioning

confidence: 99%

Fluorinated polysulfonamide based single ion conducting room temperature applicable gel-type polymer electrolytes for lithium ion batteries

et al. 2019

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Supramolecular Self-Assembly of Methylated Rotaxanes for Solid Polymer Electrolyte Application

Cited by 53 publications

References 46 publications

Intermolecular Chemistry in Solid Polymer Electrolytes for High‐Energy‐Density Lithium Batteries

Intermolecular Chemistry in Solid Polymer Electrolytes for High‐Energy‐Density Lithium Batteries

Galvanic Corrosion of Lithium‐Powder‐Based Electrodes

Fluorinated polysulfonamide based single ion conducting room temperature applicable gel-type polymer electrolytes for lithium ion batteries

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