Foldable and scrollable graphene paper with tuned interlayer spacing as high areal capacity anodes for sodium-ion batteries

Mahmood, Asif; Yuan, Zhangfu; Sui, Xiao; Riaz, Muhammad Adil; Yu, Zixun; Liu, Chang; Chen, Junsheng; Wang, Cheng; Zhao, Shenlong; Mahmood, Nasir; Pei, Zengxia; Li, Wei; Chen, Yuan

doi:10.1016/j.ensm.2021.06.020

Cited by 33 publications

(25 citation statements)

References 39 publications

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“…f) Ragone plot of as‐fabricated ZIHC compared with recent reported ZIHCs and other aqueous hybrid capacitors. [ 11,22,53,77–80 ]…”

Section: Resultsmentioning

confidence: 99%

“…Mater. 2022, 32, 2112151 [11,22,53,[77][78][79][80] solvation structure to achieve compact electrolyte ion storage in limited device space. In coupling of laminate graphene interspacing optimization and Zn-ion solvation structure regulation, the thus-assembled ZIHC manifests a superior cycling life of 100 000 cycles with 93.9% capacitance retention and an outstanding volumetric capacitance of 235.4 F cm −3 .…”

Section: Discussionmentioning

confidence: 99%

“…Benefit from the excellent properties of graphene films, the quasi-solid-state 75% NHG-rGO//Zn ZIHC exhibited an superior areal energy density of 383 µW h cm −2 at 442 µW cm −2 , which far outstripped recent reported aqueous ZIHCs, such as Zn//CNT ZIHC (29.6 µW h cm −2 ), [77] as summarized in Ragone plot in Figure 6f and Table S7, Supporting Information. [11,22,53,[77][78][79][80]…”

Section: (7 Of 13)mentioning

confidence: 99%

“…e) Capacitance retention of the quasi-solid-state ZIHC obtained from GCD curves under different mechanical stimulation. f) Ragone plot of as-fabricated ZIHC compared with recent reported ZIHCs and other aqueous hybrid capacitors [11,22,53,[77][78][79][80].…”

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confidence: 99%

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Harmonizing Graphene Laminate Spacing and Zinc‐Ion Solvated Structure toward Efficient Compact Capacitive Charge Storage

Luo

Liu

et al. 2022

Adv Funct Materials

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Aqueous Zn-ion hybrid capacitors (ZIHCs) present prominent potentials in flexible wearable electronics application scenarios due to their inherent high safety and low cost. Simultaneously, volumetric energy density is one of the crucial parameters to determine the lifespan of the wearable electronics, in which lightweight and miniaturization is a cardinal prerequisite for realistic application. In this work, an aqueous ZIHC is constructed by harmonizing interlayer spacing of the laminate graphene film and Zn-ion solvation structure to improve the electrode space utilization. Laminate graphene film interspacing has been customized in the range of 0.72-0.81 nm via regulating the ratio of crumple graphene mediator, thereby optimizing the transport kinetics of large size hydrated Zn ions. Zn-ion solvation structure is further tailored by introducing ZnCl 2 electrolyte salt to accouple such regulated laminar ionic transport channel. In a result, the thusderived ZIHC demonstrates an ultralong cycling lifespan of 100 000 cycles (93.9% capacitance retention), a preeminent volumetric capacitance (235.4 F cm −3 ), and a remarkable specific area capacitance contribution (C ssa ≈ 72 µF cm −2 ). Quasisolid-state ZIHC is assembled with ZnCl 2 solution-filled polyacrylamide gel electrolyte to concurrently achieve a superior areal capacitance of 1227 mF cm −2 and great mechanical flexibility toward practical wearable application.

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“…f) Ragone plot of as‐fabricated ZIHC compared with recent reported ZIHCs and other aqueous hybrid capacitors. [ 11,22,53,77–80 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: (7 Of 13)mentioning

confidence: 99%

mentioning

confidence: 99%

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Harmonizing Graphene Laminate Spacing and Zinc‐Ion Solvated Structure toward Efficient Compact Capacitive Charge Storage

Luo

Liu

et al. 2022

Adv Funct Materials

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“…The drawbacks resulting from thick electrodes (including low foldability and inefficient ion diffusion) can be overcome by a well-engineered porous structure containing moderate space for the mechanical strain and the electrolyte near the active materials. 75,[189][190][191][192][193] Secondly, the high cost of the materials and poor productivity of foldable ESDs should also be considered. Substrates for foldable electrodes such as graphene, CC, and CNT paper have good electrical conductivity and mechanical properties but their high cost, compared with that of the conventional substrates (e.g., copper and aluminum foil), impede the commercialization of foldable ESDs.…”

Section: Outlook and Perspectivementioning

confidence: 99%

Foldable batteries: from materials to devices

et al. 2022

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New Structural Insights into Densely Assembled Reduced Graphene Oxide Membranes

Cao

Xiong

Xia

et al. 2022

Adv Funct Materials

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Densely assembled graphene‐based membranes have attracted substantial interest for their widespread applications, such as compact capacitive energy storage, ion/molecular separation, gas barrier films, and flexible electronics. However, the multiscale structure of densely packed graphene membranes remains ambiguously understood. This article combines X‐ray and light scattering techniques as well as dynamic electrosorption analysis to uncover the stacking structure of the densely stacked reduced graphene oxide (rGO) membranes. The membranes are produced by reducing graphene oxide (GO) membranes with hydrazine, during which the colloidal interactions between GO sheets are modulated by the electrolyte solution. In contrast to the common notion that direct reduction of densely assembled GO sheets in parallel tends to result in significant “graphitization”, this article unexpectedly discovers that the resultant densely packed rGO membrane can still retain the interconnected network nanochannels and show good capacitive performances. This inspires the development of a hierarchical structural model to describe the densely packed rGO membranes. This article further shows that the nanochannel network can be fine‐tuned at the sub‐nanometer level by tailoring the salt concentration and the reduction temperature to render exceptional volumetric capacitance and good rate performance for rGO membranes even with increased packing density.

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Foldable and scrollable graphene paper with tuned interlayer spacing as high areal capacity anodes for sodium-ion batteries

Cited by 33 publications

References 39 publications

Harmonizing Graphene Laminate Spacing and Zinc‐Ion Solvated Structure toward Efficient Compact Capacitive Charge Storage

Harmonizing Graphene Laminate Spacing and Zinc‐Ion Solvated Structure toward Efficient Compact Capacitive Charge Storage

Foldable batteries: from materials to devices

New Structural Insights into Densely Assembled Reduced Graphene Oxide Membranes

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