Long-aspect-ratio N-rich carbon nanotubes as anode material for sodium and lithium ion batteries

Highly active Fe7S8 encapsulated in N-doped hollow carbon nanofibers for high-rate sodium-ion batteries

“…S10a), there is no obvious voltage plateau. Their specific capacity is attributed to sodium adsorption on the defect sites and solvated-Na-ion co-intercalation in NHCFs [39][40][41]. As shown in Fig.…”

“…As shown in Fig. 3(a), the peaks at 0.05 V (cathodic scan) and 0.076 V (anodic scan), which are formed by the ether-based electrolyte, can occur only when solvated-Na-ion co-intercalated in NHCFs [39,40]. As a comparison, the NHCFs/Fe 7 S 8 anode holds a higher elevation of redox current density than the NHCFs/FeS 2 anode, which will result in a higher reversible capacity.…”

One‐Step Synthesis of Porous Ni−Co−Fe−S Nanosheet Arrays as an Efficient Battery‐Type Electrode Material for Hybrid Supercapacitors

“…The serious challenges of contamination of the environment, fossil fuel shortage, as well as the extensive and imminent application of renewable resources, have stimulated universal interest to explore eco-friendly energy storage devices. [1,2] Supercapacitors, which possess substantial advantages of long cyclability, quick charging ability, high power density, and easy fabrication, have been highly regarded as the appealing devices for energy harvesting, electric vehicles, portable electronics, and so on. [3][4][5][6][7][8][9][10] Nonetheless, their commercial applications are severely restricted by low energy density.…”

High Capacity and Rate Capability Binder‐less Ternary Transition Metal‐organic Framework as Anode Material for Lithium‐ion Battery

“…Among all the EES devices currently available, lithium-ion batteries (LIBs) are the most sought ones and are actively developed for many electricallypowered-but-disconnected-from-grid applications due to numerous advantages such as high energy density, long life cycle, high safety and environmental friendliness [1][2][3][4]. Over the past few decades, steady advancement on the electroactive materials as anode for LIBs gives a positive implication that the conventionally used lower capacity graphite anode (theoretical capacity~372 mA•h•g À 1 ) [5] could be replaced by higher performing materials such as transition metal oxides [6][7][8][9], carbon materials [10][11][12], silicon [13,14], and metal sulfides [15,16] in terms of capacity and cyclability. However, rapid rise of new consumers (it is estimated that a new billion population emerges in 13-15 years' time) and depleting natural resources as well as increased awareness against mining for primary materials, production of new materials from sustainable sources and routes have become the utmost research focus [17].…”