Recently, great interest has been aroused in flexible/bendable electronic equipment such as rollup displays and wearable devices. As flexible energy conversion storage units with high power density represent indispensable components of electronics, they should be carefully considered. However, it is a challenge to fabricate sources. This mainly due the lack reliable materials that combine both electronically superior conductivity mechanical flexibility, which also possess stability...

Research activities related to the development of negative electrodes for construction high‐performance Li‐ion batteries (LIBs) with conventional cathodes such as LiCoO 2 , LiFePO 4 and LiMn O are described. The anode materials classified in three main categories, insertion, conversion, alloying type, based on their reactivity Li. Although numerous have been proposed (i.e., half‐cell assembly), few them reached commercial applications, apart from graphite, Li Ti 5 12 Si, Sn‐Co‐C. This...

Development of an eco-friendly, low cost and high energy density (∼700 W h kg−1) LiMnPO4 cathode material became attractive due to its operating voltage ∼4.1 V vs. Li falling within the electrochemical stability window conventional electrolyte solutions offers more safety features presence a strong P–O covalent bond. The vacancy formation for was 0.19 eV higher than that LiFePO4, resulting in 10−3 times-diluted complex concentration, which represents main difference between kinetics initial...

Supercapacitors, based on fast ion transportation, are specialized to provide high power, long stability, and efficient energy storage using highly porous electrode materials. However, their low density excludes them from many potential applications that require both power performances. Using a scalable nanoporous graphene synthesis method involving an annealing process in hydrogen, here we show supercapacitors with electrodes capable of achieving not only 41 kW kg-1 Coulombic efficiency...

Abstract Sodium metal (Na) anodes are considered the most promising anode for high‐energy‐density sodium batteries because of their high capacity and low electrochemical potential. However, Na undergoes uncontrolled dendrite growth, unstable solid electrolyte interphase layer (SEI) formation during cycling, leading to poor coulombic efficiency, shorter lifespan. Herein, a series Na‐ion conductive alloy‐type protective interface (Na‐In, Na‐Bi, Na‐Zn, Na‐Sn) is studied as an artificial SEI...

In this study, we report a novel route via microwave irradiation to synthesize bio-inspired hierarchical graphene–nanotube–iron three-dimensional nanostructure as an anode material in lithium-ion batteries. The comprises vertically aligned carbon nanotubes grown directly on graphene sheets along with shorter branches of stemming out from both the and nanotubes. This structure provides conductive network for efficient charge-transfer prevents agglomeration restacking enabling Li-ions have...

A novel sodium hybrid capacitor (NHC) is constructed with an intercalation‐type material [carbon coated‐Na 3 V 2 (PO 4 ) , C‐NVP] and high surface area‐activated carbon derived from eco‐friendly resource cinnamon sticks (CDCs) in organic electrolyte. This NHC possesses a combination of energy power density, along remarkable electrochemical stability. In addition, the C‐NVP/CDC system outperforms present, well‐established lithium systems all areas, can thus be added to list candidates for...

This review describes the overall research activities focused on developing high-performance Li-ion batteries (LIBs) fabricated with various TiO2 polymorphs as insertion anodes. Although several of have been reported, only anatase, rutile, bronze, and brookite phases proven promising. The bronze phase's lower potential, high reversibility current performance makes it an attractive candidate for constructing power energy density packs. In addition, phase exhibits superior over conventional,...

Abstract Very high surface area activated carbons (AC) are synthesized from pine cone petals by a chemical activation process and subsequently evaluated as an electrode material for supercapacitor applications in nonaqueous medium. The maximum specific of ∼3950 m 2 g −1 is noted the treated with 1:5 ratio KOH to (PCC5), which much higher than that reported carbonaceous materials derived various other biomass precursors. A symmetric fabricated PCC5 electrodes, results showed enhanced...

In the present review, we describe development of a high energy density LIB fabricated with all 1D nanofibers as anode and cathode, well separator-cum-electrolyte prepared by an electrospinning technique without compromising power capability cycle life. Such unique assembly certainly enables realizing advantages using nanostructures in practical LIBs, irrespective or cathode presence gelled polyvinylidene fluoride-co-hexafluoropropylene separator-cum-electrolyte. Outstanding cycling profiles...

We report the synthesis of two-dimensional (2D) Co3S4 in a nanothickness sheetlike morphology via simple hydrothermal process and its application to electrochemical energy-storage devices. The presence unique mesopores with combination core/shell nanoparticles nanosheets showed superior performances as negative electrode for Li-ion battery (LIB) an electrocatalyst Li–O2 applications. A high discharge capacity ∼968 mAh g–1 is noted after 60 cycles excellent cycling stability when evaluated...

Pristine Fe₃O₄ and Fe₃O₄–graphene composites were synthesized by using a green low cost urea assisted microwave irradiation method utilized as electrode materials for symmetric supercapacitor applications.

Development of high performance lithium‐ion (Li‐ion) power packs is a topic receiving significant attention in research today. Future development the Li‐ion relies on capacity and rate anodes. More specifically, materials undergo either conversion or an alloying mechanism with Li. However, irreversible loss (ICL) one prime issues for this type negative electrode. Traditional insertion‐type also experience ICL, but it considered negligible. Therefore, eliminating ICL crucial before...

We report a novel P2-type Na_0.5Ni_0.26Cu_0.07Mn_0.67O₂ (NCM) mixed oxide obtained by conventional solid-state method as prospective cathode for sodium-ion battery (SIB) applications.

Nano-sized β-NiMoO4–CoMoO4·xH2O composites were synthesized by a solution combustion synthesis (SCS) technique. The effect of weight ratio transition metal on the electrochemical capacitive performance nanocomposites was investigated cyclic voltammetry and galvanostatic charge–discharge methods. NiMoO4–CoMoO4·xH2O nanocomposite with 3 : 1 (Ni Co) exhibits enhanced behaviour relative to other delivered maximum specific capacitance 1472 Fg−1 at current density 5 mAcm−2. enhancement in is due...

Sodium metal phosphates, NaMPO₄(M = Mn, Co and Ni) were successfully synthesized by a solution combustion synthesis (SCS) method using glycine-nitrate as precursor.

The abundance of sodium resources has recently motivated the investigation ion batteries (SIBs) as an alternative to commercial lithium batteries. However, low power and capacity conventional anodes hinder their practical realization. Although most research concentrated on development high-capacity anodes, with a combination high have not been widely realized. Herein, we present simple microwave irradiation technique for obtaining few-layered, ultrathin two-dimensional SnS2 over graphene...

Nanostructured α-Fe2 O3 with and without fluorine substitution were successfully obtained by a green route, that is, microwave irradiation. The hematite phase materials evaluated as high-performance electrode material in hybrid supercapacitor configuration along activated carbon (AC). presence of was confirmed through X-ray photoelectron spectroscopy transmission electron microscopy. Fluorine-doped Fe2 (F-Fe2 ) exhibits an enhanced pseudocapacitive performance compared to the bare phase....

Hybrid capacitors, especially sodium hybrid capacitors (NHCs), have continued to gain importance and are extensively studied based on their excellent potential serve as advanced devices for fulfilling high energy power requirements at a low cost. To achieve remarkable performance in the two electrodes employed must be superior with enhanced charge storage capability fast kinetics. In this study, new capacitor system super ionic conductor NaTi 2 (PO 4 ) 3 grown graphene nanosheets an...