All-Solid-State Flexible Supercapacitors Fabricated with Bacterial Nanocellulose Papers, Carbon Nanotubes, and Triblock-Copolymer Ion Gels

Kang, Yu; Chun, Sang Jin; Lee, Sung Suk; Kim, Bo Yeong; Kim, Jung Hyeun; Chung, Haegeun; Lee, Sun Young; Kim, Woong

doi:10.1021/nn301971r

Cited by 451 publications

(263 citation statements)

References 33 publications

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“…PG paper based solid-state supercapacitor shows a comparable performance to the previously reported carbon nanotube based solid-state devices. [45][46][47] In sharp contrast, G-87 paper and G-air paper only delivered a specific capacitance of 38 F g -1 and 5 F g -1 at 0.5 A g -1 (Figure 6c, dot line and dash line). The capacitance became negligible when the current density increased to 2 A g -1 (not shown here).…”

Section: Articlementioning

confidence: 94%

Flexible free-standing graphene paper with interconnected porous structure for energy storage

Shu

Wang

et al. 2015

J. Mater. Chem. A

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A novel porous graphene paper is prepared via freeze drying a wet graphene oxide gel, followed by thermal and chemical reduction. The macroscopic structure of the formed graphene paper can be tuned by the water content in the gel precursor. With 92% water content, an interconnected macroporous network can be formed. This porous graphene (PG) paper exhibits excellent electrochemical properties. It can deliver a high discharge capacity of 420 mA h g −1 at a current density of 2000 mA g −1 when used as binder-free lithium ion battery anode. PG paper exhibits a specific capacitance of 137 F g −1 at 1 A g −1 in a flexible all-solid-state supercapacitor with PVA/H 2 SO 4 electrolyte. It can maintain 94% of its capacitance under bending. This electrochemical performance and mechanical flexibility makes it an excellent material for flexible energy storage devices. A novel porous graphene paper is prepared via freeze drying a wet graphene oxide gel, followed by thermal and chemical reduction. The macroscopic structure of the formed graphene paper can be tuned by the water content in the gel precursor. With 92% water content, an interconnected macroporous network can be formed. This porous graphene (PG) paper exhibits excellent electrochemical properties. It can deliver a high discharge capacity of 420 mAh g -1 at a current density of 2000 mA g -1 when used as binder-free lithium ion battery anode. PG paper exhibits a specific capacitance of 137 F g -1 at 1 A g -1 in a flexible all-solidstate supercapacitor with PVA/H 2 SO 4 electrolyte. It can maintain 94% of its capacitance under bending. This electrochemical performance and mechanical flexibility makes it an excellent material for flexible energy storage devices.

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Section: Articlementioning

confidence: 94%

Flexible free-standing graphene paper with interconnected porous structure for energy storage

Shu

Wang

et al. 2015

J. Mater. Chem. A

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“…Various strategies have been developed to improve their energy densities. [46][47][48] For example, the specific capacitance of buckypapers was increased from 75 to 290 F/g after plasma treatment. [49] Besides working as supercapacitor electrodes, CNT papers were also studied as flexible anodes for lithium ion batteries.…”

Section: Flexible Electrodes Without Inert Mechanical Supportmentioning

confidence: 99%

Carbon Nanomaterials for Flexible Energy Storage

Cheng¹,

Liu²

2013

Materials Research Letters

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Flexible energy storage systems have substantial inherent advantages in comparison with many currently employed systems due to improved versatility, performance and potentially lower cost. The research within this field is currently undergoing tremendous developments as new materials, composites and large-scale assembly strategies are being developed. In this review, we summarize recent progresses toward the development of flexible electrodes based on carbonaceous nanomaterials with particular emphasis on rational electrode design. Strategies to assemble flexible electrodes, both with and without inert mechanical supports, are reviewed and compared. Depending on their composition, the flexible electrodes can be used in important energy storage systems including supercapacitors and lithium ion batteries. The trend on future developments is also analyzed.

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“…不仅可将多种合成和天然聚合物电纺成单一纳米纤维 [2,3] , 还可以得到复合纳米纤维材料, 例如同轴纺丝 [4] 、三轴纺丝 [5,6] 、多层交叉纺丝等 [7～9] 技术的应用, 推动了该技术的快速发展. 由于纳米纤维材料性能的优良特性, 在膜过滤器 [10,11] 、组织工程支架 [12,13] 、生物工程 [14] 、临床医学 [15,16] 、超敏传感器 [17,18] 、锂电池材料 [19] 和超级电容器 [20] 等方面具有巨大的研究价值. 然而, 目前能进行静电纺丝的常用聚合物种类还相对较少, 主要集中在聚乙烯醇(PVA) [21,22] 、聚丙烯腈(PAN) [23,24] 、聚乙烯吡咯烷酮 (PVP) [5,6,25] 等, 而对多糖类物质和天然聚合物的静电纺丝研究一直是该领域的难点 [26～28] , 极度限制了静电纺丝研究的进一步发展.…”

Section: 引言unclassified

Study on Synthesis, Rheological and Electrospinning Functional Materials of Carboxymethyl Cellulose Lithium (CMC-Li)

邱磊¹,

邵自强²,

王建全³

et al. 2013

Acta Chim. Sinica

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The study on electrospinning of natural polysaccharide polymer to be nano-crystallized is still difficult in the current time. Carboxymethyl cellulose sodium (CMC-Na) was successfully synthesized and acidized to obtain carboxymethyl cellulose hydrogen (CMC-H), and new ionic cellulose ether CMC-Li was synthesized by alkalization, and then we analyzed the difference of structure between the three products. By comparing the rheological measurement and analysis of CMC-Na and CMC-Li, which have different mass fractions, it is found that they both show the characteristics of non-Newtonian fluid. The non-Newtonian index of CMC-Li is lower than that of CMC-Na when the degree of substitution (DS) and viscosity of both is similar. For the same material, the ionic cellulose ether solution of lower DS and higher concentration shows the lower non-Newtonian index. For the structure and property characteristic of polymers, it was easy to combine them with water-soluble hydroxyl terminated high molecular weight polyethylene oxide (PEO) to allocate the excellent electrospinning solution. Processing conditions were adjusted to a flow rate of 4 mL/h, an applied voltage of 25 kV, the spinning distance of 12 cm, the better appearance of nanofibers whose average diameter is about 70 nm can be obtained. In the process of electrospinning, hydroxyl lithium ester enolates was obtained by reductive reaction of the ionized Li ＋ with active hydroxyl, which caused the molecular structure to be destroyed. CMC-Li showed the exceptional Non-Newtonian fluid properties and had the better spinning performance than CMC-Na. When the surface tension of liquid was damaged by external electric force of spinning voltage to balance each other, the obtained morphology of the fiber was better. Nano-aluminum powder is coated with CMC-Li to form composite nanofibers, and carbonized at the high temperatures. Al/CNF/Li composite fiber was obtained in which nano particles were uniformly distributed. We preliminarily studied the obtained composite material that remained morphology and structure of fiber, which lays the foundation for the later research that the material is applied to soluble membrane, tissue engineering scaffolds, biological medicine, lithium battery and super capacitor, etc. The satisfactory effects have been achieved through analysis of IR, Rheology and SEM. The paper expands the type of polysaccharide polymer that can be electrospun and filled the void of related research, and it also lays the foundation for the study on nano functional materials of new ionic cellulose ether.

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All-Solid-State Flexible Supercapacitors Fabricated with Bacterial Nanocellulose Papers, Carbon Nanotubes, and Triblock-Copolymer Ion Gels

Cited by 451 publications

References 33 publications

Flexible free-standing graphene paper with interconnected porous structure for energy storage

Flexible free-standing graphene paper with interconnected porous structure for energy storage

Carbon Nanomaterials for Flexible Energy Storage

Study on Synthesis, Rheological and Electrospinning Functional Materials of Carboxymethyl Cellulose Lithium (CMC-Li)

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