Responsive electrolytes that inhibit electrochemical energy conversion at elevated temperatures

Kelly, Jesse C.; Gupta, Rishi; Roberts, Mark

doi:10.1039/c4ta06482h

Cited by 39 publications

(42 citation statements)

References 45 publications

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“…The lower critical solution temperature of the electrolytes modified by these smart polymers fully covers the thermal runaway temperature of LIBs. Aiming at this, Kelly et al conducted pioneering works. They demonstrated that the combination of a thermally reactive polymer, poly(benzyl methacrylate) (PBMA), and 1‐ethyl‐3‐methylimidazolium bis(trifluoromethanesulfonyl) imide) (LiTFSI/[EMIM][TFSI]) ionic liquid electrolyte could be used to reversibly turn off a LIB when the temperature increased over a predetermined threshold .…”

Section: New Libs Chemistries: Self‐protectionmentioning

confidence: 99%

“…While the voltage‐responding separators and thermal‐responsive electrolytes not only provide reversible self‐protection to LIBs, but also undergo redox reactions during cycling. So, these smart designs may deteriorate power/cycle performance to some extent . On this basis, more fundamental researches should be conducted in the future.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

“…So, these smart designs may deteriorate power/cycle performance to some extent. [117,119,149,150] On this basis, more fundamental researches should be conducted in the future.…”

Section: Smart Design Without Performance Compromisementioning

confidence: 99%

“…Thermal-responsive electrolytes 5% in electrolytes [149,150] Very small ≈279 Almost indiscernible Estimated energy density: Energy density is roughly estimated based on Figure 21. As an example, if the self-healing elements were integrated with a conventional LIB, 100 g kWh −1 nickel foil should be added.…”

Section: Performance Improvement For Smart Designmentioning

confidence: 99%

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Smart Materials and Design toward Safe and Durable Lithium Ion Batteries

et al. 2019

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Smart electrochemical energy storage devices are devices that can operate autonomously to some extent. Although the conventional electrochemical energy storage devices, e.g., the commonly used lithium‐ion batteries (LIBs), may be externally monitored in terms of their voltage and current output to reflect the state of health for the devices, it is extremely important to exploit materials and devices that are intrinsically smart enough to be capable of rapidly self‐detecting and responding to faults, such as interior short circuits, overheating, abnormal capacity drop, and other types of mechanical/chemical damage. These “smart” features could significantly enhance the safety characteristics and durability of LIBs, which is essential for future usage. Therefore, recent achievements toward smart materials and design strategies for safer and more durable LIBs are summarized. The main categories are as follows: 1) New materials: This category mainly includes smart electrode materials with thermal/electrical/mechanical self‐response functions, and self‐response separators to suppress thermal runaway/lithium dendrite growth; 2) New chemistries: This category mainly includes electrolytes with reversible self‐protecting functions; and 3) New architectures with novel functions, such as shape‐recovery, self‐heating, and self‐monitoring. Besides the working mechanisms, the challenges that must be overcome for smart LIBs to be adopted in practical applications are also discussed.

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Section: New Libs Chemistries: Self‐protectionmentioning

confidence: 99%

Section: Challenges and Perspectivesmentioning

confidence: 99%

“…So, these smart designs may deteriorate power/cycle performance to some extent. [117,119,149,150] On this basis, more fundamental researches should be conducted in the future.…”

Section: Smart Design Without Performance Compromisementioning

confidence: 99%

Section: Performance Improvement For Smart Designmentioning

confidence: 99%

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Smart Materials and Design toward Safe and Durable Lithium Ion Batteries

et al. 2019

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“…These findings make it possible to tune the T LCST of polyethers in an IL by selecting appropriate IL structures. The IL solutions showing LCST phase behavior can be, for instance, a good candidate for thermoresponsive electrolytes …”

Section: Introductionmentioning

confidence: 99%

Self‐Assembly of Polyether Diblock Copolymers in Water and Ionic Liquids

Kobayashi

Kitazawa

Komori

et al. 2016

Macromol. Rapid Commun.

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Here the thermoresponsive self-assembly of diblock copolymers comprising poly(ethyl glycidyl ether) (PEGE) and poly(ethylene oxide) (PEO) in water and ionic liquids (ILs) is investigated. PEGE undergoes lower critical solution temperature (LCST) phase separation in both water and 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([C2 mim][NTf2 ]), while PEO is a compatible segment for these solvents. The diblock copolymers, PEGE-b-PEO, undergo thermosensitive unimer-micelle transitions at temperatures close to the LCST point (TLCST ) of the PEGE homopolymer in water but not in [C2 mim][NTf2 ], even at temperatures much higher than TLCST . The difference in the thermoresponsivity of these solutions is explored using differential scanning calorimetry results from rather small magnitudes of the thermodynamic parameters for the phase transition of the PEGE segment in [C2 mim][NTf2 ], compared with those in water. Due to such small magnitudes, TLCST of the PEGE segment for the block copolymers in the IL is greatly affected by the elongation of soluble PEO segments.

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Thermoplastic Elastomer‐Enabled Smart Electrolyte for Thermoresponsive Self‐Protection of Electrochemical Energy Storage Devices

et al. 2016

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Thermoresponsive smart electrolytes based on Pluronic solution are developed for active control and thermal self-protection of electrochemical energy-storage devices. Mechanistic studies reveal that the highly effective and reversible self-protection behavior is attributed to the sol-gel transition of the Pluronic solution upon temperature change. The transition temperature and the degree of performance suppression can be tuned over a wide range.

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Responsive electrolytes that inhibit electrochemical energy conversion at elevated temperatures

Abstract: Ionic liquid-doped polymers are used as responsive electrolytes to inhibit device operation at the elevated temperatures where thermal hazards exist.

Cited by 39 publications

References 45 publications

Smart Materials and Design toward Safe and Durable Lithium Ion Batteries

Smart Materials and Design toward Safe and Durable Lithium Ion Batteries

Self‐Assembly of Polyether Diblock Copolymers in Water and Ionic Liquids

Thermoplastic Elastomer‐Enabled Smart Electrolyte for Thermoresponsive Self‐Protection of Electrochemical Energy Storage Devices

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