Preparation of porous biochar and its application in supercapacitors

Ding, Mingtao; Ma, Ziwen; Su, Hao; Li, Ye; Yang, Kuo; Dang, Lianfa; Li, Fangfei; Xue, Bing

doi:10.1039/d2nj03455g

Cited by 10 publications

(3 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is caused by its better pore structure and expansibility. 88,89 Compared with smectite with strong expansibility, kaolinite, illite, and chlorite are deemed as possessing weakly expansible or non-expansible clay minerals with a negligible difference. 90,91 Hence, the contribution of expansibility to the adsorption amount is lower than that of pore structure in this work, although some scholars stated that the expansion of kaolinite may be slightly better.…”

Section: Influence Of Toc and Clay Minerals On Water Vapor Adsorptionmentioning

confidence: 99%

Water Adsorption and Its Pore Structure Dependence in Shale Gas Reservoirs

et al. 2023

View full text Add to dashboard Cite

Investigating the occurrence characteristics of water molecules in shale is of great resource, economic, and environmental significance. In this work, the adsorption behavior of water vapor on Longmaxi shale samples is tested, and several isothermal adsorption models are employed to fit the experimental data and primary and secondary adsorption processes. Furthermore, the influence of organic matter content, mineralogical composition, and pore structure on the adsorption process is discussed, and their special combination relationship is revealed correspondingly. The results indicate that the Dent model is suitable for the experimental data with excellent goodness of fit, and the Langmuir and Freundlich models are suitable for the primary and secondary adsorption processes, respectively. The adsorption of water vapor is controlled by the pore volume and specific surface area (SSA) of shale. Mesopore structure parameters mostly determine the water adsorption amount. Massive micropores developed in organic matter with a huge SSA contribute strongly to the primary adsorption process. In general, the combination of organic matter and clay minerals controls the pore structure of shale, which further controls the primary and secondary adsorption processes of water vapor. These findings contribute to a better understanding of water adsorption in different adsorption carriers and in microscopic pores of different sizes occurring in shale gas reservoirs.

show abstract

Section: Influence Of Toc and Clay Minerals On Water Vapor Adsorptionmentioning

confidence: 99%

Water Adsorption and Its Pore Structure Dependence in Shale Gas Reservoirs

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The specific surface area and pore size distribution are the most important factors affecting the capacitive properties of carbon materials. [21][22][23] Therefore, the morphology and porous structure of LHPCs are studied and shown in Fig. 2.…”

Section: Effect Of Carbonization Temperature On Carbon Yield and Morp...mentioning

confidence: 99%

3D hierarchical tri-doped porous carbon derived from calcium lignosulfonate for high-performance zinc ion hybrid capacitors

Ma,

Yang,

Huang

et al. 2023

New J. Chem.

View full text Add to dashboard Cite

show abstract

“…(Hassan et al, 2020) (Xinran et al, 2021) Biochar is often subjected to an alkaline etching process to remove impurities and increase surface area before it can be used as an electrode. (Wang et al, 2022, Ding et al, 2022, Rawat et al, 2023 However, most reagents are toxic and corrosive. Therefore, an environmentally friendly and simple method is needed to use superior biochar from low-cost resources.…”

Section: Introductionmentioning

confidence: 99%

Electrode Material Optimization for Microbial Fuel Cells Using Bamboo Charcoal Powder and Bokuju

Shimohata,

Nguyen,

Taguchi

2023

Resourceedings

View full text Add to dashboard Cite

Bamboo is a fast-growing plant in Southeast Asia, Africa, and Latin America. Due to its rapid growth, bamboo is considered a problem because it rapidly invades forested areas and alters the original ecosystem. On the other hand, it is regarded as a material that is readily available and very accessible in many countries and has great potential for both ecological and social purposes. Therefore, bamboo was employed as the material for the electrodes of microbial fuel cells in this study. Typically, biochar used for electrodes is chemically activated to remove impurities and increase its surface area. However, chemical treatment of biochar can have a negative impact on the activity of microorganisms. The Bamboo charcoal powder, prepared by heat-treating powdered bamboo for one hour under air at 500°C, contained about 75% carbon and had a porous structure. Therefore, the material could be used as an electrode material for microbial fuel cells without complicated and time-consuming treatment processes. Some of these treatment processes include chemical treatment, and chemically treated biochar may impact the environment. Bamboo charcoal, which does not require this chemical treatment process, is effective as an electrode material for microbial fuel cells. Bokuju, a common kind of drawing ink in Japan and mainly composed of carbon black, was used as a binder for the prepared bamboo charcoal. The reason for using powdered bamboo charcoal with Bokuju is that it is easier to obtain a solid electrode shape by a drying process. We used this electrode in a floating microbial fuel cell and optimized the ratio of Bamboo charcoal powder and Bokuju in the electrode. By evaluating the performance of the microbial fuel cell using the Bamboo charcoal Bokuju electrode, we were able to improve the effectiveness of the electrode material.

show abstract

Preparation of porous biochar and its application in supercapacitors

Abstract: In this study, economical porous biochar was prepared from an apricot shell and used as electrode material for the supercapacitor, showing excellent capacitance, cycling stability and rate performance. KOH was...

Cited by 10 publications

References 48 publications

Water Adsorption and Its Pore Structure Dependence in Shale Gas Reservoirs

Water Adsorption and Its Pore Structure Dependence in Shale Gas Reservoirs

3D hierarchical tri-doped porous carbon derived from calcium lignosulfonate for high-performance zinc ion hybrid capacitors

Electrode Material Optimization for Microbial Fuel Cells Using Bamboo Charcoal Powder and Bokuju

Contact Info

Product

Resources

About