Biomass derived functional carbon materials for supercapacitor applications

Enhancement of the photoelectrochemical production of hydrogen peroxide under intermittent light supply in the presence of an optimized biochar supercapacitor

“…Hydrogen peroxide production by atmospheric oxygen reduction has been monitored in three cases: (1) in the absence of a SC electrode by continuous illumination of the photoanode; (2) in the absence of SC by light chopping every 15 min; and in the presence of SC and by light chopping again. The quantity of hydrogen peroxide detected in the electrolyte of the cathode compartment in each case is given in the plots of Fig.…”

“…In addition, mobile electronics and mobile power supply have promoted energy storage question to one of the most challenging technological subjects of our days. Batteries are, of course, the best known and direct means of energy storage; however, particular attention is also recently paid to very-high-capacity capacitors, which are generally named supercapacitors (SC) [1][2][3][4][5][6]. Supercapacitors, like all capacitors, have a great advantage; they can be fast charged and discharged, therefore, can also provide a direct means of energy storage.…”

“…So it is important to valorize a waste (like the raw biomass or even the biochar) for an energy application like the production of supercapacitors. In this respect, biochar does make an excellent material applicable to the construction of supercapacitors [1][2][3][7][8][9][10][11][12][13][14][15][16]. Biochars usually have high surface area and additionally have a balanced distribution of micropores and meso/macro pores and a significant amount of surface groups.…”

Design of Ni(OH)2/M-MMT Nanocomposite With Higher Charge Transport as a High Capacity Supercapacitor

“…There appears Ni(OH) 2 aggregation formation during the preparation process, causing poor electrochemical performance ( Soserov et al, 2018b ). To solve the above problems, many scholars have loaded metal hydroxides on carbon materials with high specific surface area and high electrical conductivity or composited with metal oxides to improve the capacitance performance and cycle stability ( Li et al, 2017 ; Liang et al, 2017 ; Chen et al, 2020 ; Li et al, 2020 ; Rawat et al, 2022 ). MMT was a layered substance composed of three parts, that is, two silicon-oxygen tetrahedra are located on the upper and lower sides of symmetry, and an aluminum-oxygen octahedron is sandwiched in the middle.…”

Soft‐template assisted preparation of hierarchically porous graphitic carbon nitride layers for high‐performance supercapacitors

“…In comparison, since the nitrogen atoms could be easily retained in the product, the N‐doped carbon prepared from the decomposition of nitrogen‐contained precursor could exhibit higher N‐doping level. N‐contained polymers, 8 biomass 9 and small molecular 10 are usually used as the precursors for the decomposition process. By using N‐contained polymers and biomass as the precursors, the formed sample usually inherits the original structure of the precursor, which are difficult to be tuned into regular layered structure.…”