Flexible supercapacitors with high capacitance retention at temperatures from −20 to 100 °C based on DMSO-doped polymer hydrogel electrolytes

Liu, Yanan; Li, Huili; Wang, Xue; Lv, Tian; Dong, Keyi; Chen, Zilin; Yang, Yunlong; Cao, Shaokui; Chen, Tao

doi:10.1039/d1ta02397g

Cited by 92 publications

(39 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[20,21] Thus, organic solvents such as ethylene glycol (EG), DMSO, and glycerin have been proven to reduce the freezing point of water. [20,22,23] Just like other ions in water, the introduction of these organic solvents reduces the "'free water"' content in the water molecules through the HBs they form with the water molecules. [24][25][26] Although organic-water mixtures or salt-in-water solutions can effectively suppress the freezing point of water, the leakage of liquid electrolytes hinders their applications in flexible wearable batteries under low temperatures.…”

Section: Introductionmentioning

confidence: 99%

A “Two‐in‐One” Strategy for Flexible Aqueous Batteries Operated at −80 °C

Shi

Ren

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

The development of aqueous metal-ion batteries has attracted great attention due to their relatively low cost and high safety levels. However, their practical applications are hindered by the ease at which their aqueous electrolytes freeze. Inspired by the antifreezing properties of salts and alcohol cryoprotective agents, a "two-in-one" cryoprotective agent, hydroxyl-functionalized poly( ionicliquid) (PIL-OH)-based hydrogel electrolyte for aqueous lithiumion batteries (ALIBs) is developed. The synergy of both ionic hydration and hydrogen bond interactions between the PIL-OH and water molecules impairs the hydrogen-bond networks of water and depresses the freezing point of water below −80 °C. Benefiting from exceptional ultralow temperature tolerance, the prepared PIL-OH hydrogel exhibits a highly enhanced low temperature adaptability and a high ionic conductivity of 0.08 mS cm −1 at −80 °C. The PIL-OH hydrogel-based flexible ALIBs exhibit high flexible durability and good cycling stability with 93% capacity retention over 200 cycles at −80 °C. The PIL-OH hydrogel report herein opens up new opportunities for practical applications of wearable and flexible aqueous batteries at ultralow temperature environments, such as the North and South Poles.

show abstract

Section: Introductionmentioning

confidence: 99%

A “Two‐in‐One” Strategy for Flexible Aqueous Batteries Operated at −80 °C

Shi

Ren

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…Currently, adding a mixed solution of water and organic solvent (or metal salt) to the hydrogel can effectively broaden the working temperature range of energy storage equipment. For instance, by adding H 2 O and a small amount of organic solvent dimethyl sulfoxide (DMSO) to form an H 2 O/DMSO binary solution, the hydrogel exhibits thermal stability and frost resistance to prevent water from freezing at low temperatures (working temperature can be reduced to −20 °C) [18] . Similarly, hydrogel electrolytes with ethylene glycol can also operate at −40 °C [21] .…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, considerable effort has been devoted toward the development of flexible supercapacitors with high working voltage. Supercapacitors based on polyvinyl alcohol/polypyrrole composite hydrogel and flexible carbon nanotube films and symmetrical supercapacitors based on cobalt hexacyanoferrate/reduced graphene oxide hydrogels have a wide voltage window of 0-2 V. [17][18] To overcome the problem of low working voltage in common acid or alkaline hydrogels, a neutral PVA-Na 2 SO 4 hydrogel film is used to reach a working voltage of 1.8 V. [19] The working voltage of this hydrogel electrolyte is higher than that of the liquid electrolyte. Qing et al [20] designed a solid-state electrolyte of poly(3,4-ethylenedioxythiophene)-poly(vinyl alcohol) that maintains high electrical activity, elongation at break > 400 %, and neutral pH; they used this electrolyte to assemble solid-state supercapacitors with high voltage performance.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, by adding H 2 O and a small amount of organic solvent dimethyl sulfoxide (DMSO) to form an H 2 O/DMSO binary solution, the hydrogel exhibits thermal stability and frost resistance to prevent water from freezing at low temperatures (working temperature can be reduced to À 20 °C). [18] Similarly, hydrogel electrolytes with ethylene glycol can also operate at À 40 °C. [21] Supplementation with additives can inhibit the freezing of the hydrogel, which is attributed to the synergy of hydrogen bonds between the organic solvent (DMSO or EG), H 2 O, and the functional groups of the polymer chain.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Low‐Temperature and High‐Voltage‐Tolerant Zinc‐Ion Hybrid Supercapacitor Based on a Hydrogel Electrolyte

2022

View full text Add to dashboard Cite

For flexible supercapacitors, adequate flexibility, a wide voltage window, and the ability to operate under ultralow temperatures remain a great challenge. In this study, a high-performance solid hydrogel (referred to as the PAM-SA-Ca 2 + hydrogel) with a tensile length reaching 2013.5 % and strong low-temperature tolerance was constructed. This ensured its stable structure at levels as low as À 75 °C . When it was used as the electrolyte in a flexible zinc-ion hybrid supercapacitor (ZHS), it could provide a wide operating voltage window of 0-2.2 V for ZHSs. Benefiting from these advantages, the ZHS device not only delivered a high specific energy (202.3 W • h • kg À 1 ), specific power (1048 W • kg À 1 ) and excellent cycling stability with capacity retention of 85.82 % after 11000 cycles, but it could also drive a timer at the ultralow-temperature of À 75 °C, emphasizing its great application potential as an advanced flexible electronic device.

show abstract

A Supercapacitor Architecture for Extreme Low‐Temperature Operation Featuring MXene/Carbon Nanotube Electrodes with Vertically Aligned Channels and a Novel Freeze‐Resistant Electrolyte

Zhao,

Yang,

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

The electrochemical performance of supercapacitors drops precipitously at extreme low temperatures due to a multitude of reasons, which includes electrolyte freezing, sluggish ion transport in the electrode and electrolyte, and high charge transfer resistance at electrode–electrolyte interfaces. To address high interface resistance, a new supercapacitor architecture is reported, in which MXene/carbon nanotube electrodes with vertically aligned channels are synthesized to reduce tortuosity and maximize the electrode–electrolyte contact area. These electrodes are fabricated using a directional‐freezing strategy, generating direct and fast ion transport pathways. Further, a freeze‐resistant electrolyte which shows high ionic conductivity is synthesized by designing a double‐crosslinked polymer network in a binary solvent consisting of ionic liquid and water, which exhibits an ultralow freezing temperature of −54 °C. An all‐in‐one supercapacitor is assembled by an integrated polymerization strategy to minimize interfacial resistances. The resulting device delivers a specific capacitance of 231 F g−1 at 2 mV s−1 and a maximum energy density of 10.17 Wh kg−1, while maintaining a capacitance retention of 92%, even at an extreme low temperature of −50 °C. The supercapacitor architecture developed in this study, demonstrates the feasibility of electrochemical energy storage at extreme low temperatures.

show abstract

Flexible supercapacitors with high capacitance retention at temperatures from −20 to 100 °C based on DMSO-doped polymer hydrogel electrolytes

Abstract: Flexible supercapacitors have attracted increasing interests due to their high power density, long-term cycling life and excellent safety. Liking other energy storage devices, flexible supercapacitors show serious performance degradation as...

Cited by 92 publications

References 55 publications

A “Two‐in‐One” Strategy for Flexible Aqueous Batteries Operated at −80 °C

A “Two‐in‐One” Strategy for Flexible Aqueous Batteries Operated at −80 °C

Low‐Temperature and High‐Voltage‐Tolerant Zinc‐Ion Hybrid Supercapacitor Based on a Hydrogel Electrolyte

A Supercapacitor Architecture for Extreme Low‐Temperature Operation Featuring MXene/Carbon Nanotube Electrodes with Vertically Aligned Channels and a Novel Freeze‐Resistant Electrolyte

Contact Info

Product

Resources

About