An all-solid-state lamellar-nanostructured polymer electrolyte in-situ-prepared from smectic liquid crystal for thermally stable dye-sensitized solar cells

Li, Xueyong; Zhao, Zhengshun; Zhou, Jiwen; Wang, Caihong; Wu, Yong; Tan, Shuai

doi:10.1016/j.ces.2020.115710

Cited by 11 publications

(12 citation statements)

References 31 publications

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“…The preelectrolyte was directly sealed by a 25 μm thick hot melt Surlyn frame (6 × 6 mm) between the counter and photoanode electrode using a coating press method. 10 The device was kept at 60 °C for 12 h to allow both the polycondensation reaction and electrolytes filling into the TiO 2 photoanode. A reference electrolyte PIL a (PIL-ILC a in absence of [C 14 MIm][I]) was also prepared to investigate the role of PIL in liquid-crystal electrolyte.…”

Section: Methodsmentioning

confidence: 99%

“…The precursor for PIL (15 wt % to ILC a ) was fully mixed with the electrolyte ILC a to give a pre-electrolyte. The pre-electrolyte was directly sealed by a 25 μm thick hot melt Surlyn frame (6 × 6 mm) between the counter and photoanode electrode using a coating press method . The device was kept at 60 °C for 12 h to allow both the polycondensation reaction and electrolytes filling into the TiO 2 photoanode.…”

Section: Experimental Sectionmentioning

confidence: 99%

“…Structurally ordered materials containing well-defined nanochannels are beneficial for efficient transport of ions. Materials including plastic crystals, , ion conductors, − amphiphilic block polymers, , and composite polymers , have been developed as electrolytes for various kinds of energy devices. Nowadays, great efforts are still needed to explore ideal electrolytes containing defect-free and macroscopic-scale continuous conducting channels for advanced energy devices.…”

Section: Introductionmentioning

confidence: 99%

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Poly(ionic liquid) Bridge Joining Smectic Lamellar Conducting Channels in Photoelectrochemical Devices as High-Performance Solid-State Electrolytes

Wang

Zhou

et al. 2021

ACS Appl. Energy Mater.

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Nanostructured ionic liquid crystals have emerged as promising electrolytes with the potential to satisfy the demands of both efficient charge transport and stability over conventional liquid electrolytes for advanced energy devices. However, traditional methods via the macroscopic orientation of ionic liquid crystals for charge transport intensification can hardly be achieved during practical device applications. Herein, a simple method was proposed to spontaneously construct long-range continuous conducting channels for significantly improving the charge transport of ionic liquid crystals in the confined space of energy devices. A poly(imidazolium ionic liquid) was designed and in situ prepared in a smectic [C 14 MIm][I]-based electrolyte for photoelectrochemical device fabrication. The composite solid-state electrolyte self-assembled microphase-segregation nanostructures, wherein the poly(ionic liquid) aggregated at the boundaries of layered smectic polydomains. The imidazolium iodide ions in the poly(ionic liquid) acted as imbedded ion tunnels at domain interfaces via π−π stacking and ionic interaction, which facilitated the charge transport crossing the interfacial gaps to join the intradomain lamellar channels as thermally stable and long-range continuous charge transport pathways. By using the poly(ionic liquid) to bridge the domain-interfacial gaps, the ion conductivity of the ionic liquid crystals was up to 7 times increased with a maximum value of 2.0 × 10 −3 S cm −1 , and the derived dye-sensitized solar cell could operate stably at 70 °C with a 2-times enhancement and champion efficiency of 8.2%. The approach here was comparable but more processable to traditional methods via the macroscopical orientation of ionic liquid crystals for charge transport intensification within energy devices, which have great potential to develop high-performance solid-state electrolytes to achieve the best balance between efficiency and durability for energy devices.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Poly(ionic liquid) Bridge Joining Smectic Lamellar Conducting Channels in Photoelectrochemical Devices as High-Performance Solid-State Electrolytes

Wang

Zhou

et al. 2021

ACS Appl. Energy Mater.

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“…34 We further obtained all-solid-state electrolytes within DSSCs by fixing the smectic nanostructure of T − /T 2 -based ionic liquid crystals via in situ polymerization. 35 of dynamic nature, the obtained lamellar electrolytes showed good interfacial contact and only a slight decrease in performance due to the fixation of the nanostructure. The use of ionic liquid crystals provided an ideal platform for addressing the conductivity and contact issues of all-solid-state electrolytes, which inspired us to explore a more rational design of ionic liquid crystals for fabricating efficient all-solidstate electrolytes.…”

Section: Introductionmentioning

confidence: 99%

All-Solid-State Polymer Electrolyte with Efficiency and Stability Superior to Its Smectic Precursor for Photoelectrochemical Devices

Zhou

Wang

Zhang

et al. 2021

Ind. Eng. Chem. Res.

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All-solid-state electrolytes have attracted wide interest for versatile energy devices owing to their stability improvement toward sustainable applications; however, the low conductivity and interfacial contact remain to be addressed. Herein, a facile method was proposed for preparing superior allsolid-state electrolytes from ionic liquid crystals. A vinylimidazolium thiolate/disulfide redox-based lamellar nanostructured electrolyte showing a smectic mesophase was prepared as a precursor, and flexible polyethylene oxide (PEO) was introduced to gel the smectic domains of the precursor to form a microphase segregation nanostructure. The PEO chains assembled at domain interfaces could significantly improve the charge transport through the smectic domain boundaries in the electrolyte. The dynamic liquid crystal gel was first assembled in a dye-sensitized solar cell (DSSC) to provide good interfacial contact, and then, in situ polymerization was performed to fabricate an all-solid-state electrolyte. The microphase segregation nanostructure was well maintained within the polymerized electrolytes for efficient charge transport. Thus, the all-solid-state electrolytes exhibited ion conductivity, thermal stability, and DSSC efficiency much superior to its smectic precursor despite the loss of fluidity. The work here sheds new light on developing desirable all-solid-state electrolytes from ionic liquid crystals for energy devices.

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“…With the continuous pursuit of higher performance energy storage devices, the development of deintercalation chemistry , to conversion chemistry − has been promoted. Although liquid lithium–sulfur batteries have many advantages, they will eventually face many bottlenecks. , Among them, the most imminent ones are the rapid dissolution and loss of polysulfide ions in organic electrolytes, lithium dendrites caused by uneven deposition of lithium ions, safety problems brought by limited mechanical strength, and poor chemical and thermal stability. − Obviously, developing solid-state polymer electrolytes (SPEs) may get the expected transformative technological updates. − However, at present, no candidate material can meet all the prerequisites of solid-state electrolytes simultaneously, that is, high room temperature ion conductivity (RTσ), excellent mechanical properties, wide electrochemical stability window, and strong lithium polysulfides trapping ability. − In addition, in practical applications, it is usually desirable to give the SPE some additional conditions, such as fast-uniform deposition of lithium ions and good adhesion with the electrode to achieve excellent interface compatibility. ,− …”

mentioning

confidence: 99%

Rearrangement of Ion Transport Path on Nano-Cross-linker for All-Solid-State Electrolyte with High Room Temperature Ionic Conductivity

et al. 2021

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The low room temperature ionic conductivity (RTσ) of polyethylene oxide (PEO)-based solid-state polymer electrolyte (SPE) severely restricts its application for lithium batteries. Herein, acrylamide (AM) has been introduced into the poly(ethylene glycol) methyl ether methacrylate-poly(ethylene glycol) diacrylate (P-P). The multiple hydrogen bonds of AM expand the original single lithium environmentand Li•••OC), which accelerates the conduction of lithium ions. In addition, the double bond modification of nanosilica (SiO 2 ) not only improves the mechanical properties but also brings a high-speed orderly vehicular transport mechanism. The multiple-lithium-ions environment is rearranged on the surface of the SiO 2 to play a more significant role, making the RTσ of SPE reach 2.6 × 10 −4 S cm −1 , and the Li-ion transfer number reaches 0.84. The results show that the assembled all-solid-state lithium−sulfur battery has a high initial discharge capacity of 707 mAh g −1 at 30 °C when the sulfur loading is 4.3 mg cm −2 , good cycle stability (capacity retention rate of 89% after 100 cycles at 0.1 C), and excellent rate performance. This SPE with high RTσ, stable interface engineering, and broad potential window (5.1 V) is expected to be used in other lithium/lithium-ion batteries that require high-voltage tolerance.

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An all-solid-state lamellar-nanostructured polymer electrolyte in-situ-prepared from smectic liquid crystal for thermally stable dye-sensitized solar cells

Cited by 11 publications

References 31 publications

Poly(ionic liquid) Bridge Joining Smectic Lamellar Conducting Channels in Photoelectrochemical Devices as High-Performance Solid-State Electrolytes

Poly(ionic liquid) Bridge Joining Smectic Lamellar Conducting Channels in Photoelectrochemical Devices as High-Performance Solid-State Electrolytes

All-Solid-State Polymer Electrolyte with Efficiency and Stability Superior to Its Smectic Precursor for Photoelectrochemical Devices

Rearrangement of Ion Transport Path on Nano-Cross-linker for All-Solid-State Electrolyte with High Room Temperature Ionic Conductivity

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