Asymmetric flow electrochemical capacitor with high energy densities based on birnessite-type manganese oxide nanosheets and activated carbon slurries

One-pot mechanochemical ball milling synthesis of the MnOx nanostructures as efficient catalysts for CO2 hydrogenation reactions

“…With the increment of the milling speed, the average particle size also decreased. The M200 sample has larger flakes and aggregated sheets identical to a typical birnessite-structure, 35 while at higher milling speeds, the crystal structure was ruined due to the higher mechanical impact as well as the higher temperature resulting in the decreases in the interlayer water. Besides the fact that the average oxidation state of manganese decreased in the case of the M450 and M600 samples compared to the M200 sample, the structure of the M450 sample consisted of a mixture of sheets and flakes and M600 consisted mostly of 10-50 nm small nanoflakes.…”

“…[25][26][27][28] The mechanochemical synthesis is suitable for the large-scale production of a variety of nanomaterials and catalysts, [29][30][31][32][33] but a few reports in the literature have described the synthesis of manganese oxides via this process. [34][35][36][37] The mechanochemical synthesis can be tuned by many parameters such as the milling rotation speed, the milling time, the solvent-template, the weight ratios of the milling mixtures and milling balls, the milling atmosphere, the type of mills, and additional treatments such as sonication or heat treatments as well. [38][39][40][41][42][43] The conventional dry milling method has significant drawbacks such as wider size distribution of materials, material loss, and friction.…”

High Performance Aqueous Li-Ion Flow Capacitor Realized Through Microstructure Design of Suspension Electrode

“…With the rapid growth of installed capacity of clean energy such as solar energy and wind energy, the research and development of technologies and devices suitable for large-scale energy storage has become increasingly important (Chu and Majumdar, 2012;Carbajales-Dale et al, 2014). Electrochemical storage devices based on flowable suspension-type (i.e., semi-solid) electrodes have gained much attraction in the last decade (Campos et al, 2013;Zhang X. et al, 2014;Hatzell et al, 2015;Madec et al, 2015;Liu and Zhao, 2016;Wang et al, 2016;Hou et al, 2017;Liu et al, 2017;Hunt et al, 2019;Wu et al, 2020). Similar to redox flow batteries, they usually consists of separated external reservoirs for active materials storage and a power reactor for electrochemical reaction to take place, which can offer good scalability and flexibility in application for many energy storage fields (Liu et al, 2017).…”

Effects of Non‐Ionic Surfactants on the Rheological, Electrical and Electrochemical Properties of Highly Loaded Silicon Suspension Electrodes for Semi‐Solid Flow Batteries

“…Redox flow battery, utilizing soluble redox couples as active substance to realize storage and release of electric energy through redox reactions, is considered as one of the most promising technologies for large-scale energy storage due to low cost and unique battery structure. [1][2][3][4] Moreover, the output power and energy storage capacity of redox flow battery can be independently designed. [5,6] Nevertheless, the energy density of redox flow batteries is generally low due to the limited solubility of the redox couples in the solution.…”