Fast and reversible thermoresponsive polymer switching materials for safer batteries

Chen, Zheng; Hsu, Po‐Chun; Lopez, Jeffrey; Li, Yuzhang; To, John W. F.; Liu, Nan; Wang, Chao; Andrews, Sean C.; Liu, Jia; Cui, Yi; Bao, Zhenan

doi:10.1038/nenergy.2015.9

Cited by 285 publications

(213 citation statements)

References 46 publications

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“…[122][123][124] LIBs are normally operated within a limited range of temperatures, current densities, and voltages to maintain good electrochemical performances. [125] Nevertheless, once a short circuit forms, overcharging or other abuse conditions occurs, and a series of exothermic reactions will take place to largely increase the internal temperature and pressure of the LIBs, which will lead to fire or explosion.…”

Section: Gpes With Thermally Responsive Abilitymentioning

confidence: 99%

Gel Polymer Electrolytes for Electrochemical Energy Storage

Cheng

Pan

Zhao

et al. 2017

Advanced Energy Materials

750

562

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storage devices with adjustable shapes and high flexibility, which is promising for the burgeoning portable and wearable electronics. [7][8][9] Furthermore, the flexibility and elasticity of GPEs are also prone to tolerate the volume change of electrode materials and the dendrites of lithium metal during charge and discharge processes. [10][11][12][13] As a consequence, GPEs have become one of the most desirable alternatives among various electrolytes for the electrochemical energy storage devices, and significant progress has been made in lithium-ion batteries (LIBs), supercapacitors (SCs), lithium-oxygen (Li-O 2 ) batteries as well as the other kinds of electrochemical energy storage devices, such as sodium-ion batteries, lithium-sulfur batteries, fuel cells, and zinc-air batteries. [14][15][16] In order to meet the requirements of wearable devices for flexibility and deformability, more special GPEs with tough, [17] stretchable, [18] and compressible [19] functionalities have been also developed.Typically, a polymeric framework is adopted in GPEs as host material, providing high mechanical integrity. Several criteria for a good polymer host lie in: [20][21][22] (i) fast segmental motion of polymer chain; (ii) special groups promoting the dissolution of salts; (iii) low glass transition temperature (T g ); (iv) high molecular weight; (v) wide electrochemical window; (vi) high degradation temperature. Within the framework, the salts in the GPEs serve as the sources of the charge carriers, which are generally required to have large anions and low dissociation energy for easier dissociating-induced free/mobile ions. According to the types of electrolytes, there are four categories of GPEs based on proton, [23] alkaline, [24] conducting salts, and ionic liquids (ILs). [25] The criteria for an appropriate electrolyte include: [26][27][28] (i) good dissociation without forming ion pairs or ion aggregation; (ii) high thermal, chemical, and electrochemical stability; (iii) high ionic conductivity. In order to dissolve both the polymer hosts and electrolytic salts, the organic/ aqueous solvents are introduced to provide the medium for ionic conduction. A good solvent should simultaneously have high dielectric constant (ɛ > 15), donor number for more dissociation of ion and chemical and electrochemical stability. Organic solvents normally include ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dimethyl formamide (DMF), dimethyl sulphoxide, ethyl methyl carbonate, and tetrahydrofuran.To prepare a high-performance GPE, it is essential to select the species of host polymer, solvent, and electrolytic salt, and then blend them by solution or melt processes, such as casting With the booming development of flexible and wearable electronics, their safety issues and operation stabilities have attracted worldwide attentions. Compared with traditional liquid electrolytes, gel polymer electrolytes (GPEs) are preferred due to their higher safety and adaptability to the design of ...

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Section: Gpes With Thermally Responsive Abilitymentioning

confidence: 99%

Gel Polymer Electrolytes for Electrochemical Energy Storage

Cheng

Pan

Zhao

et al. 2017

Advanced Energy Materials

750

562

View full text Add to dashboard Cite

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“…9 Despite these advances, pumps are parasitic components in RFBs and require a minimum scale of operation (100 s of kW to a few MW) to be effective and meaningful. 15 It should be noted that bidirectional ion transport is an essential function of biological ion channels in cell membranes. Hence, RFB's are restricted for use as backup in grid balancing and not contemplated for use in mobility.…”

mentioning

confidence: 99%

Ionic redox transistor from pore-spanning PPy(DBS) membranes

Hery

Sundaresan

2016

Energy Environ. Sci.

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Electric vehicles, powered by Li-ion batteries, are limited by short driving range, long recharge time and capacity fade to compete with fossil fuel-powered alternatives. Alternative to Li-ion batteries such as supercapacitors and redox flow batteries with comparably high specific power and rapid recharge/refill have poor energy density due to selfdischarge. In this article, we introduce an ionic redox transistor that regulates bidirectional ion transport across the membrane as a function of its redox state and applicable as a smart membrane separator in supercapacitors and redox flow batteries. The smart membrane separator would enable the design of a new category of rechargeable/refillable energy storage devices with high energy density and specific power and overcome contemporary limitations of electric vehicles.

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“…[83] This material was composed of a polymer matrix with a high thermal expansion coefficient and graphene-coated spiky nanostructured nickel (GrNi) particles embedded within the matrix. Polyethylene (PE) was chosen as the matrix polymer, due to its electrochemical stability and high thermal expansion coefficient (≈10 −4 K −1 ).…”

Section: Smart Design To Avoid Overheatingmentioning

confidence: 99%

“…Reproduced with permission. [83] Copyright 2016, Nature Publishing Group. www.advmat.de www.advancedsciencenews.com the capacity was restored to its initial level with no significant sacrifice of energy storage performance (Figure 3f).…”

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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Fast and reversible thermoresponsive polymer switching materials for safer batteries

Cited by 285 publications

References 46 publications

Gel Polymer Electrolytes for Electrochemical Energy Storage

Gel Polymer Electrolytes for Electrochemical Energy Storage

Ionic redox transistor from pore-spanning PPy(DBS) membranes

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

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