Rarely negative-thermovoltage cellulose ionogel with simultaneously boosted mechanical strength and ionic conductivity <i>via</i> ion-molecular engineering

Chen, Qun-Feng; Cheng, Baohua; Wang, Zequn; Sun, Xuhui; Liu, Yang; Sun, Haodong; Li, Jianwei; Chen, Lihui; Zhu, Xuhai; Huang, Liulian; Ni, Yonghao; An, Meng

doi:10.1039/d2ta09068f

Cited by 18 publications

(5 citation statements)

References 43 publications

(56 reference statements)

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“…The X‐ray diffraction (XRD) results demonstrate that the cellulose I crystal allomorph of the cellulose pulp was disrupted by IL, confirming the dissolution of cellulose chains. [ 30 ]…”

Section: Resultsmentioning

confidence: 99%

Hierarchically Porous Cellulose Membrane via Self‐Assembly Engineering for Ultra High‐Power Thermoelectrical Generation in Natural Convection

Sun,

Tang,

et al. 2023

Adv Funct Materials

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Renewable heat‐to‐power conversion based on thermoelectric strategy holds strong prospect toward clean electricity generation in low‐carbon society, in which its conversion performance is mainly decided by the temperature gradient. However, achieving a high temperature gradient spontaneously throughout the day in natural convection remains a significant challenge. Herein, cost‐effective, sustainable, and hierarchically porous cellulose membrane (HPCM) created through a simple self‐assembly engineering of cellulose molecules is proposed. Such HPCM boasts a unique structure of layered micro‐ and nanoscaled pores with ≈95% porosity, and correspondingly demonstrates >94% solar reflectance and >0.9 mid‐infrared emissivity. As a result, HPCM enables average temperature gradient of 14.5 °C and 76 mV output voltage of thermoelectric module during daytime natural convection, which are 17‐ and 30‐time higher than those of pristine device, respectively. Note that HPCM‐based thermoelectric module consistently generates an average output voltage of 44.2 mV all day. Such modules are seamlessly integrated into thermoelectric arrays to achieve high output voltage of ≈1.5 V and power density of ≈3 W m−2 over 90‐d period. The prepared HPCM marks a significant advancement in environmentally friendly, scalable, and viable thermoelectric conversion to power the low‐carbon society.

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“…The X‐ray diffraction (XRD) results demonstrate that the cellulose I crystal allomorph of the cellulose pulp was disrupted by IL, confirming the dissolution of cellulose chains. [ 30 ]…”

Section: Resultsmentioning

confidence: 99%

Hierarchically Porous Cellulose Membrane via Self‐Assembly Engineering for Ultra High‐Power Thermoelectrical Generation in Natural Convection

Sun,

Tang,

et al. 2023

Adv Funct Materials

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“…The Ni–Cl–M displayed a negative Seebeck coefficient of −7.2 mV K −1 , attributed to the hygroscopic nature of BTAC and the large difference in the sizes of the cationic vs anionic groups. As Chen et al 48 and Hu et al 49 suggested that electrolytes with large cationic but smaller anionic groups are ideal for negative TE materials, the negative Seebeck coefficient of Ni–Cl–M is attributed to the hygroscopic nature of BTAC and large difference in the sizes of cationic vs . anionic groups.…”

Section: Resultsmentioning

confidence: 99%

Application of lamellar nickel hydroxide membrane as a tunable platform for ionic thermoelectric studies

et al. 2023

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“…[95] Li et al developed a ZnCl 2 doped cellulose ionogel, supporting the movement of small anions while limiting the movement of large cations. [96] Excitingly, the prepared thermoelectric device can generate useful electricity (≈110 mV) by using low-grade thermal source generated by solar irradiation.…”

Section: Ionogel Electrolytes In Thermoelectric Devicesmentioning

confidence: 99%

Ionogels: Preparation, Properties and Applications

Yan,

Li,

Liu

et al. 2023

Adv Funct Materials

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Ionogels, composed of ionic liquids and supporting networks, possess a plethora of exceptional properties, including nonvolatility, remarkable thermal and electrochemical stability, elevated mechanical strength, as well as outstanding ionic conductivity. Based on these extraordinary characteristics, ionogels have found extensive applications in diverse fields encompassing functional materials, sensors, soft electronics, solid electrolytes, and biomedicine. In recent years, ionogels have witnessed significant advancements and emerged as a highly popular subject matter. Consequently, this review provides a comprehensive overview of the latest progress made in the realm of ionogels. The preparation methods of ionogels are initially introduced following a concise introduction. Subsequently, the properties of ionogels, encompassing mechanical properties, high and low temperature resistance, ionic conductivity, stimuli‐response properties, self‐healing properties, recyclability and their structure‐property relationships, are comprehensively discussed. Moreover, recent advancements in the utilization of ionogels in solid electrolytes, ionic skins, soft electronics, adhesions and other domains are also elaborated upon extensively. Finally, after a succinct summary, challenges and prospects regarding the future development of ionogels are thoroughly deliberated.

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Rarely negative-thermovoltage cellulose ionogel with simultaneously boosted mechanical strength and ionic conductivity via ion-molecular engineering

Abstract: Excellent mechanical strength and conductivity are essential and exigent features for advanced gel materials. The trade-off between them, however, remains a challenge. Here, we proposed an ion-molecular engineering strategy to...

Cited by 18 publications

References 43 publications

Hierarchically Porous Cellulose Membrane via Self‐Assembly Engineering for Ultra High‐Power Thermoelectrical Generation in Natural Convection

Hierarchically Porous Cellulose Membrane via Self‐Assembly Engineering for Ultra High‐Power Thermoelectrical Generation in Natural Convection

Application of lamellar nickel hydroxide membrane as a tunable platform for ionic thermoelectric studies

Ionogels: Preparation, Properties and Applications

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