Effect of various ammonium salts as activating additive on the capacitance performance of hierarchical porous carbon derived from camellia husk

Activated Carbon Derived from the Agricultural Waste Camellia Seed Shell for High-Performance Supercapacitors

“…The XPS survey spectra (Figure S1a) of CSSC–KOH-1:3 show two binding energy peaks at 284.8 and 532.7 eV, which are attributed to the C 1s and the O 1s, respectively. As shown in Figure S1b, the C 1s spectrum of CSSC–KOH-1:3 can be fitted into four peaks corresponding to the C–C (284.8 eV), C–O (286.1 eV), CO (288.0 eV), and O–CO (290.7 eV) groups. , The O 1s spectrum of the sample in Figure S1c produced two binding energy peaks located at 532.7 and 536.2 eV, which are assigned to C–O and H 2 O/O 2 , respectively . The oxygen-containing groups can improve the wettability of the electrode, thus improving the electrochemical performance for CSSC–KOH-1:3.…”

“…The camellia seed shell is rich in lignin, hemicellulose, and cellulose, which can provide a stable carbon source and is an excellent choice for SC electrode material . Furthermore, as agricultural waste, the camellia seed shell can be transformed into carbon materials of practical value through carbonization and activation processes, , thereby promoting resource reuse and enhancing the circular economy rooted in agriculture. Research on the camellia seed shell-derived ACs can realize localized resource utilization, reduce transportation costs from raw material, and promote the development of a local new energy industry.…”

Flexible Carbon Cloth Supercapacitors with High Power and Energy Densities

“…[16,18] Quan and Guo applied KOH to active carbon materials that were originally from organic biowaste. [29,30] They found that the KOH activation process can lead to the formation of a rough porous structure on the CC surface. Through the XRD investigation, the KOH activation favors the formation of the amorphous carbon, resulting porous carbon microstructure.…”

“…To further explore the charge storage mechanism, the capacitive contribution proportions of capacitive and diffusion for obtained CC electrode are calculated based on the literature. [30,36] The b value, which is obtained by the linear fitting line of log(scan rate) and log(current peak), determines the electrode storage behavior. In our cases, the b values is about 0.98, which represent typical capacitive electrochemical behavior.…”

Oxygen vacancies of NiMoO4 nanoneedles on Ni foam for high-performance asymmetric supercapacitors

“…As the global climate continues to deteriorate, the search for renewable, green and efficient energy storage devices has received widespread international attention. [1][2][3] Therefore, the development and use of safe, efficient and green renewable energies to replace traditional fossil fuels has become a major trend in the future development of the world. 4 Currently, the world's mainstream energy storage devices include lithium-ion batteries, zinc-ion batteries, metal-air batteries, chemical fuel cells, SCs and solar cells.…”