Interwoven N and P dual-doped hollow carbon fibers/graphitic carbon nitride: An ultrahigh capacity and rate anode for Li and Na ion batteries

Design of Core–Shell‐Structured ZnO/ZnS Hybridized with Graphite‐Like C3N4 for Highly Efficient Photoelectrochemical Water Splitting

“…And the peaks at 285.7 and 288.0 eV are arising from the CO/CN and NCN (Nsp 3 C). Furthermore, the curves of N 1s (Figure e) peak can be divided into two evident peaks at 398.8 and 399.8 eV, which are usually assigned to pyridinic and pyrrolic N species, respectively . The combing analysis of C 1s and N 1s can strongly demonstrate the successful introduction of g‐C 3 N 4 .…”

Fabrication of Core‐Shell Ni2P@N, P−Co‐Doped Carbon/Reduced Graphene Oxide Composite as Anode Material for Lithium‐ and Sodium‐Ion Batteries

“…The anodic peak at 0.92 V was assigned to the extraction of Li + from structural defects and active sites that was resulted from the doped N and P atoms. [23] As shown in Figure S5b-d, the specific capacities of N, PÀ C/GN, PÀ C/GN, C/GN anode materials were maintained at 492, 377, and 230 mA h g À 1 after 100 cycles at 100 mA g À 1 , respectively. This result indicated that the heteroatom doping supported a significant promotion of total capacity, which could be ascribed to the enhanced synergistic charge storage behavior and affinity between the Ni 2 P NPs and carbon material.…”

Ultrafast Sodium Storage through Capacitive Behaviors in Carbon Nanosheets with Enhanced Ion Transport

“…For instance, Lu's group demonstrates that microporous carbon nanosheets exhibit improved kinetics compared with microporous carbon spheres by direct experiment data and theoretical calculations . In addition, nitrogen‐doping can enhance electron conductivity, reactivity and reduce energy barrier because of the extrinsic defects and high electronegativity of nitrogen, which further improves electrochemical performance . Hence, constructing a material like thin microporous nitrogen‐doped carbon nanosheets as an anode for SIBs transports sodium ions quickly to the active sites.…”

“…[7,8] Among potential anode materials, metal alloys/oxides/sulfides exhibit extremely poor cycling performance owing to exaggerative volume expansion during sodiation/desodiation process and titanium-based oxides display low specific capacity, while amorphous carbon is a suitable candidate because of low cost, natural abundance, thermal stability, controllable structure and high electrochemical activity. [9] Hence, a variety of carbonaceous materials, like expanded graphite, [10] biomass derived carbon [11][12][13][14][15][16] and heteroatom doped carbon, [17][18][19][20][21] have been developed, which shows effective sodium storage owing to wide interlayer distance and defects. Nonetheless, to explore the high rate materials for SIBs still remains a major challenge.…”

“…[28] In addition, nitrogen-doping can enhance electron conductivity, reactivity and reduce energy barrier because of the extrinsic defects and high electronegativity of nitrogen, which further improves electrochemical performance. [17,[29][30][31] Hence, constructing a material like thin microporous nitrogen-doped carbon nanosheets as an anode for SIBs transports sodium ions quickly to the active sites. Subsequently, adsorption process for sodium storage can be completed quickly.…”