Solid polymer electrolytes: materials designing and all-solid-state battery applications: an overview

Agrawal, Ritesh; Pandey, Gaind P.

doi:10.1088/0022-3727/41/22/223001

Cited by 914 publications

(638 citation statements)

References 164 publications

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“…Crystallization of PEO is known to markedly decrease the ionic conductivity of ICMs made by traditional casting or blending 11,31 . However, in the (PEO/ANF) n composite we do not observe crystalline phase even though the polymer is deposited at room temperature, with and without lithium triflate, before and after soaking in electrolyte.…”

Section: Barementioning

confidence: 99%

A dendrite-suppressing composite ion conductor from aramid nanofibres

et al. 2015

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Dendrite growth threatens the safety of batteries by piercing the ion-transporting separators between the cathode and anode. Finding a dendrite-suppressing material that combines high modulus and high ionic conductance has long been considered a major technological and materials science challenge. Here we demonstrate that these properties can be attained in a composite made from Kevlar-derived aramid nanofibres assembled in a layer-by-layer manner with poly(ethylene oxide). Importantly, the porosity of the membranes is smaller than the growth area of the dendrites so that aramid nanofibres eliminate 'weak links' where the dendrites pierce the membranes. The aramid nanofibre network suppresses poly(ethylene oxide) crystallization detrimental for ion transport, giving a composite that exhibits high modulus, ionic conductivity, flexibility, ion flux rates and thermal stability. Successful suppression of hard copper dendrites by the composite ion conductor at extreme discharge conditions is demonstrated, thereby providing a new approach for the materials engineering of solid ion conductors.

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Section: Barementioning

confidence: 99%

A dendrite-suppressing composite ion conductor from aramid nanofibres

et al. 2015

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“…This is expected to double the energy density and eliminate the volatile organic solvents, which pose a fire hazard. 4,6 For a solid material to replace liquid and gel electrolytes, it should have a minimum ion conductivity of 10 −3 S cm −1 throughout the expected range of operating temperatures.…”

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confidence: 99%

Tunable Networks from Thiolene Chemistry for Lithium Ion Conduction

et al. 2012

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End-functionalized poly(ethylene glycol) (PEG) and polydimethylsiloxane (PDMS) were cross-linked by a thiolene reaction with a tetra-functional thiol to create robust, tunable networks. These networks were loaded with increasing amounts of lithium bis(trifluoromethane sulfonyl imide) (LiTFSI), and their ion conductivity was measured. A wide range of salt loading was achieved, allowing the investigation of both salt-in-polymer and polymer-in-salt regimes. Thermal, mechanical, and ion conductivity properties of LiTFSI-loaded PEG and PEG-PDMS networks were measured. Even at high salt loadings, both networks maintained rubber-like characteristics, which were stable over a range of temperatures (30−90°C). The PEG network with the highest salt loading showed the greatest ion conductivity, 6.7 × 10 −4 S cm −1 at 30°C, as measured by impedance spectroscopy. This system provides a route to optimize lithium ion conduction and mechanical properties.A ccess to affordable, clean energy is a well-recognized scientific and technical challenge of this century.

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“…One method is to inhibit heat generation by adopting alternative electrolytes, e.g., polymer gel electrolytes and solid-state electrolytes with low ionic conductivities. [71][72][73][74] The other route is to release or absorb the heat before overheating, e.g., employing safety vents, extinguishing agents, or a thermal fuse. [70,[75][76][77][78] Although these related studies showed some effects in thermal protection, they are limited by the passive strategies with significant sacrifices of energy storage performance and irreversible self-protection reactions.…”

Section: Smart Design To Avoid Overheatingmentioning

confidence: 99%

Smart Electrochemical Energy Storage Devices with Self‐Protection and Self‐Adaptation Abilities

Yang

Wang

et al. 2017

Advanced Materials

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Currently, with booming development and worldwide usage of rechargeable electrochemical energy storage devices, their safety issues, operation stability, service life, and user experience are garnering special attention. Smart and intelligent energy storage devices with self‐protection and self‐adaptation abilities aiming to address these challenges are being developed with great urgency. In this Progress Report, we highlight recent achievements in the field of smart energy storage systems that could early‐detect incoming internal short circuits and self‐protect against thermal runaway. Moreover, intelligent devices that are able to take actions and self‐adapt in response to external mechanical disruption or deformation, i.e., exhibiting self‐healing or shape‐memory behaviors, are discussed. Finally, insights into the future development of smart rechargeable energy storage devices are provided.

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Solid polymer electrolytes: materials designing and all-solid-state battery applications: an overview

Cited by 914 publications

References 164 publications

A dendrite-suppressing composite ion conductor from aramid nanofibres

A dendrite-suppressing composite ion conductor from aramid nanofibres

Tunable Networks from Thiolene Chemistry for Lithium Ion Conduction

Smart Electrochemical Energy Storage Devices with Self‐Protection and Self‐Adaptation Abilities

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