A unique sandwich structure is designed with pure sulfur between two graphene membranes, which are continuously produced over a large area, as very simple but effective approach for the fabrication of Li–S batteries ultrafast charge/discharge rates and long lifetimes.

Large-area sheets are highly desirable for fundamental research and technological applications of graphene. Here we introduce a modified chemical exfoliation technique to prepare large-area graphene oxide (GO) sheets. The maximum area the GO obtained can reach ∼40000 μm2. We found that is strongly correlated with C−O content graphite oxide, which enables synthesized be controlled. By simply changing oxidation conditions, an average ca. 100−300, 1000−3000, ∼7000 μm2 were selectively...

Graphene-sulfur (G-S) hybrid materials with sulfur nanocrystals anchored on interconnected fibrous graphene are obtained by a facile one-pot strategy using sulfur/carbon disulfide/alcohol mixed solution. The reduction of oxide and the formation/binding were integrated. G-S hybrids exhibit highly porous network structure constructed graphene, many electrically conducting pathways, easily tunable content, which can be cut pressed into pellets to directly used as lithium-sulfur battery cathodes...

Homogeneous single-layer graphene films are fabricated using an electrophoretic deposition technique, and their field-emission properties investigated. The show high density, uniform thickness, numerous edges normal to the film surface, good interface contact adhesion with substrate, consequently excellent properties.

Abstract Graphene oxide is highly desired for printing electronics, catalysis, energy storage, separation membranes, biomedicine, and composites. However, the present synthesis methods depend on reactions of graphite with mixed strong oxidants, which suffer from explosion risk, serious environmental pollution, long-reaction time up to hundreds hours. Here, we report a scalable, safe green method synthesize graphene high yield based water electrolytic oxidation graphite. The lattice fully...

A flexible Li–S battery based on an integrated structure of sulfur and graphene a separator is developed. The internal current collector offers continuous conductive pathway, modified interface with sulfur, good barrier to effective reservoir for dissolved polysulfides, consequently improving the capacity cyclic life battery. As service our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may be re-organized online delivery,...

Ultrathin, lightweight, high-strength, and thermally conductive electromagnetic interference (EMI) shielding materials with high effectiveness (SE) are highly desired for next-generation portable wearable electronics. Pristine graphene (PG) has a great potential to meet all the above requirements, but poor processability of PG nanosheets hinders its applications. Here, efficient synthesis aligned laminated films nacre-like PG/polymer composites superhigh loading up 90 wt% by scanning...

Carbon nanotube (CNT)‐ and graphene (G)‐based transparent conductive films (TCFs) are two promising alternatives for commonly‐used indium tin oxide‐based TCFs future flexible optoelectronic devices. This review comprehensively summarizes recent progress in the fabrication, properties, modification, patterning, integration of CNT‐ G‐TCFs into Their potential applications challenges devices, such as organic photovoltaic cells, light emitting diodes touch panels, discussed detail. More...

We present a metal-catalyst-free CVD process for the high-efficiency growth of single-walled carbon nanotubes (SWNTs) on surface. By applying 30-nm-thick SiO(2) sputtering deposited Si or Si/SiO(2) wafer as substrate and CH(4) source, dense uniform SWNT networks with high quality can be obtained without presence any metal species. Moreover, simple patterned approach, using scratched substrate, is also presented SWNTs good position controllability. Our finding via will provide valuable...

Lithium–sulfur (Li–S) batteries are attracting increasing interest due to their high theoretical specific energy density, low cost, and eco-friendliness. However, most reports of the gravimetric capacity long cyclic life not practically reliable because areal derived from sulfur loading content. Here, we fabricated a highly porous graphene with pore volume 3.51 cm3 g–1 as host, enabling content 80 wt %, based on this, further proposed an all-graphene structure for cathode conductive current...

A cost-effective and industrially applicable screen printing protocol is demonstrated for scalable fabrication of graphene-based planar integrated micro-supercapacitors, with shape diversity, outstanding flexibility superior modularization.

Vacancies enhance proton conductivity Proton-exchange membranes (PEMs) allow for the transport of protons while acting as electrical insulators and ensuring that reactants are kept apart; therefore, they a key component in devices such low-temperature fuel cells. PEMs typically made from polymers or materials embedded polymer matrix need to operate conditions very high humidity. Starting with an inorganic, layered material, CdPS 3 , Qian et al. show removal small amount cadmium introduces...

With the rapid development of graphene industry, low-cost sustainable synthesis monolayer oxide (GO) has become more and important for many applications such as water desalination, thermal management, energy storage functional composites. Compared to conventional chemical oxidation methods, electrolytic graphite-intercalation-compound (GIC) shows significant advantages in environmental-friendliness, safety efficiency, but suffers from non-uniform oxidation, typically ~50 wt.% yield with ~50%...

Abstract Li metal is the ultimate choice for anode in next‐generation high energy density rechargeable batteries. However, undesired dendrite growth, dead formation, and a large volume change of lithium lead to severe safety hazards such as short‐circuiting, fire, or even explosion. Graphene oxide (GO) areas has been prepared host via continuous centrifugal casting method. Aligned microchannels are then fabricated it by simple punching method using 3D printed templates. The GO matrix...

Highly thermally conductive and flexible thermal interface materials (TIMs) are desirable for heat dissipation in modern electronic devices. Here, we fabricated a high-crystalline aligned graphene lamella framework (AGLF) with precisely controlled thickness, pore structure, excellent intergraphene contact by manipulating the expansion behavior of scanning centrifugal casted oxide films. The rational design AGLF balances trade-off between conductivity flexibility TIMs. AGLF-based TIM...

Tunable electrical and optical properties of graphene are vital to promote its use as film electrodes in a variety devices. We developed an etching-free ozone treatment method continuously tune the resistance transmittance films by simply varying time temperature exposure ozone. Initially, dramatically decreases p-doping, but this is followed increases result surface oxidation. The rate increase can be significantly increased raising temperature. ozone-oxidized not removed gradually...

A graphene-coated polymer separator was developed for lithium–selenium batteries with pure selenium powder as the active material.

A super-flexible single-walled carbon nanotube (SWCNT) transparent conductive film (TCF) was produced based on a combination of electrophoretic deposition (EPD) and hot-pressing transfer. EPD performed in diluted SWCNT suspension with high zeta potential prepared by pre-dispersion-then-dilution procedure using sodium dodecyl sulfate as the surfactant negative charge supplier. deposited stainless steel anode surface direct current electrophoresis then transferred to poly(ethylene...