Microfibrillated cellulose-SiO2 composite nanopapers produced by spray deposition

Krol, Lisiê Ferreira; Beneventi, Davide; Alloin, Fannie; Chaussy, Didier

doi:10.1007/s10853-015-8965-5

Cited by 19 publications

(9 citation statements)

References 29 publications

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“…Cellulose paper-based separators are also promising because of their low production costs, good mechanical properties and high electrochemical stability [156,157]. However, macro-/microfiber cellulose papers meet the intrinsic disadvantages of improper porous structure and poor mechanical/physicochemical properties [158].…”

Section: Novel Separators With High Thermal Stabilitymentioning

confidence: 99%

Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

Duan

Tang

Dai

et al. 2019

Electrochem. Energ. Rev.

602

260

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Lithium-ion batteries (LIBs), with relatively high energy density and power density, have been considered as a vital energy source in our daily life, especially in electric vehicles. However, energy density and safety related to thermal runaways are the main concerns for their further applications. In order to deeply understand the development of high energy density and safe LIBs, we comprehensively review the safety features of LIBs and the failure mechanisms of cathodes, anodes, separators and electrolyte. The corresponding solutions for designing safer components are systematically proposed. Additionally, the in situ or operando techniques, such as microscopy and spectrum analysis, the fiber Bragg grating sensor and the gas sensor, are summarized to monitor the internal conditions of LIBs in real time. The main purpose of this review is to provide some general guidelines for the design of safe and high energy density batteries from the views of both material and cell levels.

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Section: Novel Separators With High Thermal Stabilitymentioning

confidence: 99%

Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

Duan

Tang

Dai

et al. 2019

Electrochem. Energ. Rev.

602

260

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“…It was reported an operation time of fewer than 30 minutes and SiO2 can be varied from 0 to 33 wt. % into the suspension resulting tailorable properties of composite [9]. In this method, they replaced vacuum filtration with spray coating but followed the conventional process including transfering the composite with blotter and dewatering of the composite by vacuum and then peeling the film off after drying [9].…”

Section: Introductionmentioning

confidence: 99%

“…% into the suspension resulting tailorable properties of composite [9]. In this method, they replaced vacuum filtration with spray coating but followed the conventional process including transfering the composite with blotter and dewatering of the composite by vacuum and then peeling the film off after drying [9]. The developing nanocomposite and tailoring its properties by the addition of specific nanoparticles/nanofillers in the nanocellulose/cellulose nanofiber suspension via spraying is a novel process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cellulose Nanofiber (CNF) – Montmorillonite (MMT) Nanocomposite via Spray Coating Process

Shanmugam¹

2021

JMSSE

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The spray coating process is implemented through the production of smooth Montmorillonite (MMT) -Cellulose nanofiber (CNF) composite functioning as a barrier material and base substrate for printed electronics. In this process, the effect of MMT loading into the cellulose nanofiber (CNF) suspension for producing nanocomposite is independent of the operation time. Throughout this investigation, the barrier, surface, and topography of the spray coated nanocomposites were investigated. The MMT content varied from 5 wt.% to 75 wt.% in the composites via spraying of 2 wt.% of CNF suspension. Three types of nanocomposites were prepared from cellulose nanofiber with the MMT category of closite Na++, closite Ca++ and closite 116. By varying the MMT content in the nanocomposite, the spray coating was more productive with the basis weight of nanocomposites ranging from ῀70 g/m 2 to ῀100g/m 2 with sheet thickness varying from ῀81.7µm to 135.8µm and independent of the operation time which was less than 1 min. The air permeance and water vapour permeability of the spray coated nanocomposites were investigated to confirm the green materials was infact barrier material. Aggregation of MMT clays on a further increase of MMT in nanocomposite resulted in the elevation of WVP. The composite has two unique surfaces, namely rough and smooth surfaces from metal side. Scanning electron microscopy (SEM) reveals the distribution of MMT on the surface, compactness and smoothness of the composite. The composites are flexible, demonstrate good uniformity and pigmentation as a result of an increase in MMT loading.Considering the barrier performance and surface roughness of nanocomposites, it can be used as packaging materials and as a base substrate for printed electronics. In comparsion, spray coating is a more efficient process for producing sustainable nanocomposites as alternative for synthetic plastics.

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“…However, the rich hydroxyl groups on the surface of natural polymer nanofibers lead to the formation of dense and nonporous films due to the intensive hydrogen bonding of the hydroxyl groups among nanofibers, which results in low Li + ion transport in the separators. To improve the ionic conductivities in natural polymer nanofiber–based separators, a commonly employed strategy is to add pore former or use organic solvent of lower surface tension in the membrane forming process to tune the porosity and pore sizes in natural polymer nanofiber–based membranes . The reported pore formers and organic solvents include nano‐silica particles, sodium dihydrogen citrate, and isopropyl alcohol.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Separators for High‐Performance Lithium Ion Batteries Enabled by Chemical Modifications

Zhang

Chen

Tian

et al. 2019

Adv Funct Materials

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Natural polymer nanofibers are attractive sustainable raw materials to fabricate separators for high-performance lithium ion batteries (LIBs). Unfortunately, complicated pore-forming processes, low ionic conductivity, and relatively low mechanical strength of previously reported natural polymer nanofiber-based separators severely limit their performances and applications. Here, a chemical modification strategy to endow high performance to natural polymer nanofiber-based separators is demonstrated by grafting cyanoethyl groups on the surface of chitin nanofibers. The fabricated cyanoethyl-chitin nanofiber (CCN) separators not only exhibit much higher ionic conductivity but also retain excellent mechanical strength in comparison to unmodified chitin nanofiber separators. Through density function theory calculations, the mechanism of high Li + ion transport in the CCN separator is unraveled as weakening of the binding of Li+ ions over that of PF 6 − ions with chitin, via the cyanoethyl modification. The LiFePO 4 /Li 4 Ti 5 O 12 full cells using CCN separators show much better rate capability and enhanced capacity retention compared to the cell using commercial polypropylene (PP) separators. Beyond this, the CCN separator can work very well even at an elevated temperature of 120 °C in the LiFePO 4 /Li cell. The proposed strategy chemical modification of natural polymer nanofibers will open a new avenue to fabricate sustainable separators for LIBs with superior performance.

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Microfibrillated cellulose-SiO2 composite nanopapers produced by spray deposition

Cited by 19 publications

References 29 publications

Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

Preparation of Cellulose Nanofiber (CNF) – Montmorillonite (MMT) Nanocomposite via Spray Coating Process

Sustainable Separators for High‐Performance Lithium Ion Batteries Enabled by Chemical Modifications

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