Elastic ionogels with freeze-aligned pores exhibit enhanced electrochemical performances as anisotropic electrolytes of all-solid-state supercapacitors

Liu, Xinhua; Wang, Baofeng; Jin, Zilu; Wang, Huanlei; Wang, Qigang

doi:10.1039/c5ta03184b

Cited by 30 publications

(16 citation statements)

References 39 publications

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“…The device with carbon nanocage electrodes showed a specific capacitance of 172 F g −1 at 1 A g −1 . [109] Later, the same authors reported a novel cotton maskimpregnated hybrid ionogel formed by UV polymerization of the IL BMIMBF 4 with TiO 2 -NPs, N,N-dimethylacrylamide (DMAA), and methylene-bis-acrylamide (MBAA). [110] The supercapacitor based on this ionogel and activated carbon electrodes displayed a specific capacitance of 177 F g −1 at 1 A g −1 and stable capacitive behaviors at a high pressure of 3236 kPa.…”

Section: Solid Electrolytes For Supercapacitorsmentioning

confidence: 99%

“…[103][104][105][106][107][108][109][110][111][112][113][114][115][116][117][118][119] Gelated ubiquitous liquid electrolytes have also been successfully tested on supercapacitors to overcome risks in packaging, portability, and leakage. [109][110][111][112][113][114][115] Besides, to aid to their environment-friendly characteristic, several "green" materials such as egg white, [116] potato starch, [117,118] and rice starch, [119] processed through cost-effective strategies have been implemented as potential electrolytes in supercapacitors. Although recycling electrochemical devices is a common practice in many countries, supercapacitors are yet to gain attention in this regard.…”

Section: Introductionmentioning

confidence: 99%

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Supercapacitors in the Light of Solid Waste and Energy Management: A Review

Dutta

Mahanta

Banerjee

2020

Advanced Sustainable Systems

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Supercapacitors store electrical energy on the basis of electrostatic attraction between opposite charges as a result of the formation of an electric double layer (EDL) at the electrolyte/electrode interface. Carbon-derived materials are commonly used to fabricate supercapacitor electrodes owing to their high electrical conductivity, high capacitance, excellent porosity, good electrochemical stability, and large specific surface area. [131-136] Predominantly, these materials include carbon nanotubes (CNTs), graphene, carbon spheres, hollow carbon spheres, carbon nanoparticles (CNPs), etc. [62,137-145] Nevertheless, they fail to demonstrate the desirable performance in practical applications after a certain threshold owing to their short durability and low energy density. Although, metal-organic frameworks (MOFs) have proven to be better electrode candidates in certain aspects, [142,143,146-148] however, these materials incur high cost, low yield of porous carbon, high consumption of metallic nitrate, [62] and hence higher waste generation. Due to the rising concerns of waste production and its management and hence the need for sustainable and cheap resources, reusing and/or converting waste from various sources such as industrial, agricultural, food, and spent electronic devices efficiently into usable carbon has attracted much interest since recently.

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Section: Solid Electrolytes For Supercapacitorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Supercapacitors in the Light of Solid Waste and Energy Management: A Review

Dutta

Mahanta

Banerjee

2020

Advanced Sustainable Systems

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“…Recently, Liu et al also reported a method which uses polyethylene glycol (PEG) derivatives as a directional template for the formation of aligned porous structures. The resulting material exhibited anisotropic properties, with improved species transport in a particular direction compared to an equivalent nonaligned ionogel . However, their applications have been limited by poor thermal and mechanical stabilities resulting in decomposition at high temperatures .…”

Section: Relative Diffusivities Calculated Using Taufactor For the Twmentioning

confidence: 99%

Aligned Ionogel Electrolytes for High‐Temperature Supercapacitors

et al. 2019

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Ionogels are a new class of promising materials for use in all‐solid‐state energy storage devices in which they can function as an integrated separator and electrolyte. However, their performance is limited by the presence of a crosslinking polymer, which is needed to improve the mechanical properties, but compromises their ionic conductivity. Here, directional freezing is used followed by a solvent replacement method to prepare aligned nanocomposite ionogels which exhibit enhanced ionic conductivity, good mechanical strength, and thermal stability simultaneously. The aligned ionogel based supercapacitor achieves a 29% higher specific capacitance (176 F g −1 at 25 °C and 1 A g −1 ) than an equivalent nonaligned form. Notably, this thermally stable aligned ionogel has a high ionic conductivity of 22.1 mS cm −1 and achieves a high specific capacitance of 167 F g −1 at 10 A g −1 and 200 °C. Furthermore, the diffusion simulations conducted on 3D reconstructed tomography images are employed to explain the improved conductivity in the relevant direction of the aligned structure compared to the nonaligned. This work demonstrates the synthesis, analysis, and use of aligned ionogels as supercapacitor separators and electrolytes, representing a promising direction for the development of wearable electronics coupled with image based process and simulations.

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“…The ice-templating process was employed to prepare anisotropic TiO 2 nanocomposite ionogels. [138] The mechanism of the ice-template method is similar to magnetorheological (MR) technology. The nanoparticles are first immobilized by a magnetic field [139][140][141] or ice in a polymer monomer solution, and then polymerized.…”

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

Overview of Ionogels in Flexible Electronics

Zhang

Jiang

Dong

et al. 2020

The Chemical Record

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Ionogels have aroused wide interests in the field of flexible electronics. The combination of solid‐state networks and ionic liquids opens up thousands of possibilities for ionogels. The unique structures of ionogels endow them excellent mechanical properties, conductivity and thermal stability to approach the challenge of flexible electronic. A large number of new ionogels have been developed by different methods including the exchange of solution, polymeric ionic liquid and in‐situ reactions in ionic liquids (gelation of low molecular weight gelators, self‐assembly of block polymers, formation of double‐network structure, ionogel nanocomposites and direct polymerization of polymerizable monomers). The aim of this review is to discuss different preparation methods of ionogels and the comparison of their advantages.

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Elastic ionogels with freeze-aligned pores exhibit enhanced electrochemical performances as anisotropic electrolytes of all-solid-state supercapacitors

Abstract: The directional-freezing construction of elastic ionogel electrolytes is described, offering an effective approach to attain aligned structures and enhanced electrochemical properties for energy storage devices.

Cited by 30 publications

References 39 publications

Supercapacitors in the Light of Solid Waste and Energy Management: A Review

Supercapacitors in the Light of Solid Waste and Energy Management: A Review

Aligned Ionogel Electrolytes for High‐Temperature Supercapacitors

Overview of Ionogels in Flexible Electronics

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