Dual carbon source method to fabricate hierarchical porous carbon with three-dimensional interconnected network structure toward advanced energy storage device

Ammonium persulfate assisted synthesis of ant-nest-like hierarchical porous carbons derived from chitosan for high-performance supercapacitors and zinc-ion hybrid capacitors

“…51,53 With the addition of hydrothermal additives, the diffraction peaks are hardly discernible in A-PCs, H-PCs, and AH-PCs, indicating a decrease in the ordering, which demonstrates an expansion of the carbon lattice and the presence of more pores on the surface of A-PCs, H-PCs, and AH-PCs. 51,54 This alteration, characterized by a wider and diminished peak, suggests an enlargement of the interlayer spacing within the carbon materials, and demonstrates an expansion of the carbon lattice and the presence of more pores on the surface of these samples with the addition of hydrothermal additives, 9,11 while the PCs show a relatively strong (002) diffraction peak in the XRD pattern, which is related to its fewer defects (e.g., pores). 37 As shown in the Raman spectra (Fig.…”

“…7b, which show scan rates ranging from 5 to 200 mV s −1 , indicates a strong rate capability of the supercapacitor as built. 6,9 Using the Dunn method, we similarly examined the contributions of EDLC and pseudo-capacitance to evaluate the inuence of the hierarchical porous structure and heteroatom doping in the AH-PC-based electrode immersed in a 1 M Na 2 SO 4 electrolyte. As shown in Fig.…”

“…[1][2][3][4][5] How to effectively and cheaply transform these agricultural wastes into valuable chemical products and materials has drawn increasing attention all over the world. [6][7][8][9] Biomass wastes possess the advantages of wide availability, sustainability, renewability, distinctive structures, and cost-effectiveness, and can be employed as excellent precursors for producing porous carbons. [10][11][12][13][14][15] The variety of structures found in porous carbons obtained from biomass wastes allows for a variety of applications, including in water treatment, hydrogen storage, electrochemical energy storage, dye-sensitized solar cells, and carbon dioxide extraction.…”

“…The inadequate specic surface areas and porosity, and decient heteroatom retention, lead to suboptimal electrochemical performance in supercapacitors during high-rate and long-cycle operations. [6][7][8][9][10][11][12][13][14][15][35][36][37] The practical achievement of hundreds of thousands of cycles is still challenging, and it has been reported that the service life of carbon-based devices rarely exceeds 200 000 cycles, especially at high current rates. 38 How to increase the active sites of chitosan to increase the crosslinking degree, to effectively prepare chitosan-derived porous carbons with enhanced electrochemical performance, is still a great and critical challenge.…”

Engineering Flower-like Ni3S2 on Nanoporous CuAg Alloy Heterostructure for Efficient Methanol Oxidation Reaction

“…The rapid depletion of conventional fossil fuels, along with rising environmental pollution, has spurred an urgent demand for novel environment-friendly and efficient energy conversion devices. − Among various energy carriers to replace fossil fuels, methanol shows great potential because of its affordability, high energy density, and low carbon emission. − In particular, direct methanol fuel cells (DMFCs) have been recognized as prospective energy conversion devices, because of their high energy conversion efficiency, easy storability and transportability, environmental friendliness, and mild operating temperatures. − To date, the reactions on anode electrodes in DMFCs have been yet heavily dependent on Pt-based precious metal electrocatalysts . Despite the excellent activity of Pt-based catalysts, the scaled-up application of DMFCs has been largely hindered by their high price and extreme scarcity. , Moreover, it is worth noting that Pt-based catalysts are prone to be poisoned by intermediate products, leading to a significant deterioration in both electrocatalytic activity and stability.…”