A nitrogen-doped amorphous/graphitic hybrid carbon material derived from a sustainable resource for low-cost K-ion battery anodes

Abstract

Owing to high natural abundance and relatively low redox potential of potassium (K), the K-ion battery (KIB) is a compelling substitute technology for the currently used lithium-ion battery (LIB). In...

NASICON-Type Na3V1.5Cr0.4Fe0.1(PO4)3: High-Voltage and High-Rate Cathode Materials for Sodium-Ion Batteries

“…Raman spectroscopy was used to analyze the carbon contents of the different cathode materials: NVP, NVCP, NVFP, and NVCFP. The Raman spectra of both cathodes exhibited D and G bands at 1375 and 1600 cm −1 , respectively, which are characteristic of carbon with dominant disorder sp2 Raman features 43 (Figure S6). The CHN analysis was used to determine the carbon contents of the two cathode materials.…”

Recent advances in rational design for high-performance potassium-ion batteries

“…455 Furthermore, doping is often accompanied by a widening of the interlayer spacing, which promotes the insertion/extraction of potassium ions in the carbon anode, thereby improving the potassium storage capacity. [465][466][467][468][469][470] In 2016, Share et al 377 successfully increased the potassium storage capacity of graphite from the theoretical maximum value of 279 mA h g À1 to 350 mA h g À1 by doping nitrogen into few-layer graphene (Fig. 35a and b).…”

A synergistic pinning effect in a layer-structured oxide cathode for enhancing stability towards potassium-ion batteries

“…1–4 Presently, they are in urgent need of cathode materials which can offer high specific capacity and long-term cycling stability to support large-scale applications. 5–7 Potential cathode categories, such as transition metal oxides, 8,9 polyanionic materials, 10–12 Prussian blue analogs, 13,14 and organic compounds, 15–17 have been extensively investigated. 3,6,18,19 Layered transition metal oxides (K x TMO 2 , TM = transition metal) stand out owing to their unique intercalation mechanism, high theoretical capacity and flexible elemental composition advantages.…”