Wood-based self-supporting flexible electrode materials for energy storage applications

Liu, Linlin; Ji, Zhen; Zhao, Shuyan; Niu, Qingyuan; Hu, Songqi

doi:10.1039/d0ta12312a

Cited by 40 publications

(24 citation statements)

References 44 publications

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“…[ 53 ] Conducting nanocarbons (e.g., graphene, carbon nanotubes) or polymers (e.g., polyaniline‐PANI or polypyrrole‐PPy nanowire array) are usually used to evenly cover the surface of wood aligned carbon microchannel for charge‐transport, while the unique hierarchically porous structure can be effectively preserved to diffuse ions. [ 54 ] Using sequential physical deposition and in situ polymerization, electroactive PANI/reduced graphene oxide (RGO or rGO) and PPy/RGO can be formed on a lightweight substrate of natural sliced wood veneer to function as supercapacitor electrode with honeycomb porous structure and aligned straight‐channels, which allowed the transportation of aqueous electrolytes to accelerate ionic/electronic diffusion. [ 55 ] SACs and/or transition‐metal composites moored in carbon skeleton but not limited to woody biomass have been frequently taken the spotlight of electrochemical energy storage and conversion, [ 56 ] owing to their high specific surface areas, abundant active centers and metal species.…”

Section: Naturally Hierarchical Structure Of Bulk Wood and Its Burgeo...mentioning

confidence: 99%

Rational Design of Wood‐Structured Thick Electrode for Electrochemical Energy Storage

Lei

Ming

et al. 2022

Adv Funct Materials

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It is a natural choice to realize the vision of wood‐inspired functional materials for energy engineering. Apart from being naturally abundant, renewable, and biodegradable, wood‐based devices possess hierarchically porous structures, mechanical integrity and flexibility, and tunable functionalities, holding the potential to significantly push the boundaries of efficient energy storage and conversion. Meanwhile, the hunting of batteries with superior energy/power output to redeem the ever‐growing energy demand has ignited a thick electrode conception, which is deemed as a burgeoning technic to maneuver the maximum active material loading at the device‐scale. As an integrated carbonaceous scaffold with hierarchical architecture and aligned channels, wood thick electrode ameliorates the ion/electron conductivities to strengthen the charge transfer kinetics. In this review, the rational design and unique prospects in the construction of wood thick electrodes that concerns over structural optimization and low‐tortuosity for integrated cell configuration are summarized. To trap the structure‐feature‐performance interplays, advanced wood thick electrode that opens an avenue in emerging energy chemistries such as supercapacitors, lithium‐ion/metal and post‐rechargeable batteries are also spotlighted with a standpoint on task‐tailored modification. Ultimately, the blueprint over ongoing challenges and upcoming opportunities for wood‐structured thick electrode is drawn to broaden their brand‐new energy talents.

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Section: Naturally Hierarchical Structure Of Bulk Wood and Its Burgeo...mentioning

confidence: 99%

Rational Design of Wood‐Structured Thick Electrode for Electrochemical Energy Storage

Lei

Ming

et al. 2022

Adv Funct Materials

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“…And the meddle lamella are mainly composed of lignin [19] . Our preliminary research has shown that the delignified wood composed of well‐aligned microchannels (mainly composed of aligned cellulose microfibrils) and abundant intertubular cavities (space of the middle lamella lignin) possess good mechanical flexibility [20] . After carbonization, the delignified wood‐based carbon materials also exhibit good mechanical flexibility.…”

Section: Introductionmentioning

confidence: 99%

“…[19] Our preliminary research has shown that the delignified wood composed of well-aligned microchannels (mainly composed of aligned cellulose microfibrils) and abundant intertubular cavities (space of the middle lamella lignin) possess good mechanical flexibility. [20] After carbonization, the delignified wood-based carbon materials also exhibit good mechanical flexibility. Therefore, the delignified wood-based carbon material is a potential cost-effective and environmentally-friendly flexible electrode material.…”

Section: Introductionmentioning

confidence: 99%

Aramid Nanofibers Aerogel‐filled Wood‐based Carbon Material for Flexible Solid Supercapacitors

et al. 2022

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Delignified wood‐based carbon material is a potential cost‐effective and environmentally‐friendly flexible electrode material. However, the abundant intertubular cavities not only endow excellent flexibility, but also inevitably deteriorate the conductivity, integrity and areal density of the delignified wood‐based flexible carbon material, which is not conducive to improve the energy storage performance. In this work, an aramid nanofiber‐based carbon aerogel was filled in the intertubular cavities via a series of processes, including filled by virtue of the unidirectional capillary forces, gelation, freeze‐drying and carbonization. The filled carbon aerogel can significantly increase the conductivity and the sheet resistance is as low as about 28±5 Ω sq−1. The filled carbon aerogel does not deteriorate its excellent energy storage behavior derived from the unique low‐tortuosity and open slender tubular microstructure. The filled carbon aerogel can improve the space utilization of the delignified wood‐based carbon. The areal specific capacitance has been increased from 20.8 to 51.9 mF cm−2 at a current density of 50 μA cm−2. The area specific capacitance still remains at 33.9 mF cm−2 when the current density increased to 1000 μA cm−2. The aramid nanofibers aerogel‐filled wood‐based carbon flexible interdigitated solid supercapacitors also exhibit excellent flexibility and folding endurance.

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“…Apart from capacitive performance improvement, rendering the SCs with high mechanical strength and self-healing capability is with strong practical significance as well, considering the accidental risks of daily usage (e.g., stretching, scratching, and cutting). Among those successful attempts, [7,12,19,[27][28][29][30][31] the functional encapsulation with certain material can be a favorable option since it has better versatility that can disregard the composition of electrodes and/or the configuration of SCs. [6,27,32,33] For instance, linear or planar SCs using different electrodes (e.g., rGO/MoO 3 @C, [34] PANI/carbon nanotube (CNT), [30] PANI@F-MWCNT@silk, [29] and Sb/MXene [23] ) were encapsulated with a similar self-healing polyurethane (PU) shell, which could survive from multiple damaged/self-healing cycles without severe performance degradation.…”

Section: Introductionmentioning

confidence: 99%

High Capacitive Antimonene/CNT/PANI Free‐Standing Electrodes for Flexible Supercapacitor Engaged with Self‐Healing Function

Jiang

Luo

et al. 2022

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As a conductive polymer, polyaniline (PANI) has been broadly utilized as an electrode material for highperformance SCs thanks to its large specific capacitance, [3,4] outstanding flexibility, [5][6][7] and environmental stability, let alone its easy synthesis. [8][9][10] Although PANI exhibits a satisfying performance in SCs, its relatively low electric and ionic conductivity resulting from agglomeration will lead to a sluggish redox reaction and thus a deteriorated capacitance under high current density. [11][12][13] This problem should weaken the practicality of PANI electrodes to a certain degree. According to the successful experience of other electrodes that have solved the similar problems, [14][15][16] it is preferable to combine the pseudocapacitive PANI with some conductive and porous materials, which can assist PANI to achieve its full potential via the synergistic effects. [10,[17][18][19] For instance, 2D materials (e.g., graphene) with large and adjustable surfaces could load a large number of PANI nanoparticles with good homogeneity via different means, guaranteeing a fast redox reaction and then a decent rate capability. [17,18,[20][21][22] As an important member of 2D materials, antimonene (Sb) nanosheets present not only a large surface area and high conductivity, [23,24] but also excellent mechanical strength and flexibility. [25,26] A preliminary researchIn virtue of the high electrochemical activity and inherent flexibility, polyaniline (PANI) is an ideal electrode material for flexible supercapacitors (SCs). However, in practical applications, the inevitable agglomeration of PANI leads to low capacitance, poor rate performance, and cycling stability. Here, antimonene (Sb) nanosheets with ultrathin thickness, excellent mechanical strength, and flexibility are introduced into the carbon nanotube (CNT) framework for PANI electrodeposition via simple vacuum filtration, which enables the continuous and uniform growth of PANI. The resultant free-standing Sb/CNT/PANI electrode can thus exhibit a high specific capacitance of 578.57 F g −1 together with a high rate capability. Besides, thanks to the introduction of Sb nanosheets, the agglomeration of PANI during the electrodeposition is improved, which correspondingly alleviates the structural deterioration of PANI during repeated charge/discharge. Thus, the flexible SC assembled by Sb/CNT/PANI electrodes demonstrates both an impressive specific capacitance of 416 F g −1 and outstanding cycling stability over 12 000 cycles. Moreover, this SC device can have a practical self-healing function by employing self-healable polyurethane. The facile strategy reported herein sheds light on the design of high-performance flexible SCs, catering to the needs of portable and wearable electronics.

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Wood-based self-supporting flexible electrode materials for energy storage applications

Abstract: Generally, the electrochemical energy storage devices share fundamental processes involving the diffusion and storage of ions and transport of electrons in electrode materials. The oriented 3D carbon materials can better...

Cited by 40 publications

References 44 publications

Rational Design of Wood‐Structured Thick Electrode for Electrochemical Energy Storage

Rational Design of Wood‐Structured Thick Electrode for Electrochemical Energy Storage

Aramid Nanofibers Aerogel‐filled Wood‐based Carbon Material for Flexible Solid Supercapacitors

High Capacitive Antimonene/CNT/PANI Free‐Standing Electrodes for Flexible Supercapacitor Engaged with Self‐Healing Function

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