Journal ArticleDOI
Pyrolitic carbon from biomass precursors as anode materials for lithium batteries
TLDR
In this paper, the pyrolysis of banana fibers treated with pore-forming substances such as ZnCl 2 and KOH was used to synthesize a carbon structure with disorganized single layer carbon sheets.Abstract:
Disordered carbonaceous materials were synthesized by the pyrolysis of banana fibers treated with pore-forming substances such as ZnCl 2 and KOH. X-ray diffraction studies indicated a carbon structure with a large number of disorganized single layer carbon sheets. Addition of porogenic agent led to remarkable changes in the structure and morphology of the carbonaceous products. The product obtained with ZnCl 2 treatment gave first-cycle lithium insertion and de-insertion capacities of 3325 and 400 mAh g −1 , respectively. Lower capacities only could be realized in the subsequent cycles, although the coulombic efficiency increased upon cycling, which in the 10th cycle was 95%.read more
Citations
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Journal ArticleDOI
Supercapacitors from Activated Carbon Derived from Banana Fibers
TL;DR: In this paper, the performance of carbon materials in a neutral electrolyte for the first time has been studied, and the structural and surface properties of the prepared carbon materials were studied using scanning electron microscopy and N2 adsorption/desorption studies.
Journal ArticleDOI
Promising activated carbons derived from waste tea-leaves and their application in high performance supercapacitors electrodes
TL;DR: In this paper, five types of waste tea-leaves, which come from five of the most typical tea in China, were first used to prepare activated carbons (ACs) by high-temperature carbonization and activation with KOH.
Journal ArticleDOI
Recent advances in engineered biochar productions and applications
Bing Wang,Bin Gao,June Fang +2 more
TL;DR: Biochar is mainly used as a soil amendment and for carbon sequestration; while other applications such as environmental remediation may be equally important as discussed by the authors. But biochar is difficult to extract and it is not suitable for outdoor gardening.
Journal ArticleDOI
Biomass-derived nanostructured carbons and their composites as anode materials for lithium ion batteries
Wenyu Long,Wenyu Long,Baizeng Fang,Anna Ignaszak,Zhuangzhi Wu,Yan-Jie Wang,Yan-Jie Wang,Yan-Jie Wang,David P. Wilkinson +8 more
TL;DR: This tutorial review focusing on biomass-derived carbons and their composites in the application of LIB anodes will act as a strategic guide to build a close connection between renewable materials and electrochemical energy storage devices.
Journal ArticleDOI
Nitrogen-rich porous carbon derived from biomass as a high performance anode material for lithium ion batteries
TL;DR: In this article, an ox horn derived carbon (OHC) has been successfully synthesized through an economically viable and an environmentally benign approach such that the OHC possesses a large surface area (BET surface area is 1300 m2 g−1), a unique 3D porous nanostructure and a high inherent nitrogen content (55%).
References
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Journal ArticleDOI
Mechanisms for Lithium Insertion in Carbonaceous Materials
TL;DR: Lithium can be inserted reversibly within most carbonaceous materials as mentioned in this paper, but the physical mechanism for this insertion depends on the carbon type and the type of carbon type used.
Journal ArticleDOI
The preparation of active carbons from coal by chemical and physical activation
Ali Ahmadpour,Duong D. Do +1 more
TL;DR: In this article, the effect of process variables such as carbonization time, temperature, particle size, chemical agents, method of mixing and impregnation ratio in the chemical activation process was studied in order to optimize those preparation parameters.
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A Mechanism of Lithium Storage in Disordered Carbons
TL;DR: High-resolution electron microscopy and lithium-7 nuclear magnetic resonance measurements suggest the existence of Li2 covalent molecules in the carbon material, which promises extraordinarily high energy density for secondary batteries.
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Mechanism of lithium insertion in hard carbons prepared by pyrolysis of epoxy resins
TL;DR: In this paper, the authors describe the preparation of hard carbon samples from epoxy resins and show that these materials incorporate small nanopores between the single layers, which are about 15 A in diameter.
Journal ArticleDOI
Activated carbons from lignocellulosic materials by chemical and/or physical activation: an overview
TL;DR: In this article, four series of activated carbons prepared from lignocellulosic materials (almond shells and olive and peach stones) by either physical activation (uncatalysed and iron catalysed) in CO2 or in a water-nitrogen mixture, or direct chemical activation with ZnCl2 of the precursor were selected to show the comparative behavior of the activation procedures.