High nitrogen-oxygen dual-doped three-dimensional hierarchical porous carbon network derived from Eriocheir sinensis for advanced supercapacitors

Lignin-Based Polymer Networks Enabled N, S Co-Doped Defect-Rich Hierarchically Porous Carbon Anode for Long-Cycle Li-Ion Batteries

“…Integral peak area fitting of the four peaks demonstrated that more than half of the N-containing species was pyridine and pyrrole nitrogen (N-5 was 26.1%, N-6 was 24.6%). The large amount of pyridine nitrogen and pyrrole nitrogen in LSCF can effectively improve the electronic conductivity of the carbon as reported. ,, The spectrum of S 2p is displayed in Figure d that can be divided into S 2p 1/2 (164.16 eV), S 2p 3/2 (165.39 eV), C–SO 3 –C (168.63 eV), and C–SO 4 –C (169.93 eV), indicating the good interaction of S with the C. It can be concluded that the N and S elements were effectively co-doped into the carbon framework. And the lone pair electrons in S and N can effectively adjust the electrons’ environment of the carbon, thus modifying the electrical conductivity of the material …”

“…And the pores in the LSCF are mostly mesopores with diameters of 3.89 and 14.92 nm as displayed in Figure e. The high specific surface area and good mesoporous structure of LSCF can provide more active sites for the electrochemical reaction and facilitate electrolyte penetration . In contrast, easy aggregation of pure lignin particles led to a low specific surface area and little mesoporous structure of LC, which is harmful for the improvement of the specific capacity and high rate performance of the anode.…”

“…The large amount of pyridine nitrogen and pyrrole nitrogen in LSCF can effectively improve the electronic conductivity of the carbon as reported. 37,40,41 The spectrum of S 2p is displayed in Figure 4d that can be divided into S 17 We further assembled CR2016 half-cells using LSCF and LC as working electrodes to study the electrochemical perform-ance comprehensively. Figure 5a shows that the initial discharge specific capacities of LSCF anode at 100 mA g −1 can reach 350 mA g −1 , and the reference LC anode only exhibited 80 mAh g −1 .…”

Transforming Disposed Face Masks into S‐Doped Carbon Nanofibers for High Performance Supercapacitors

“…Figure 7(d) shows the GCD behaviour of CSDFM@800 sample under different current densities, exhibiting symmetric charge/discharge behaviour with negligible voltage drop. At current density of 0.5 A g −1 , CSDFM@800 sample has the highest specific capacitance of 234 F g −1 , significantly surpassing that of commercial active carbon (~100 F g −1 ) [29] and recent reported results [30–37] (Table 1).…”

Recent advances in biopolymers-based carbon materials for supercapacitors

“…with biopolymers to obtain pore formation. 96,97 Physical activation is more bene-cial to the environment, but the resulting activated carbon has a low yield, narrow PSD and low SSA, making its specic capacitance difficult to meet realistic conditions. 12,98 So it is less studied and usually used in conjunction with chemical activation.…”