Hollow Carbon-Nanotube/Carbon-Nanofiber Hybrid Anodes for Li-Ion Batteries

International Journal of Energy ResearchVolume 44, Issue 8 p. 7103-7103 CORRIGENDUMFree Access Corrigendum This article corrects the following: TiNb2O7 microsphere anchored by polydopamine-modified graphene oxide as a superior anode material in lithium-ion batteries Hyeongwoo Kim, Yongheum Lee, Dongjin Byun, Wonchang Choi, Volume 44Issue 6International Journal of Energy Research pages: 4986-4996 First Published online: February 26, 2020 First published: 16 June 2020 https://doi.org/10.1002/er.5617AboutSectionsPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat ‘TiNb2O7 microsphere anchored by polydopamine-modified graphene oxide as a superior anode material in lithium-ion batteries’ International Journal of Energy Research 2020;44:4986-4996. Hyeongwoo Kim | Yongheum Lee | Dongjin Byun | Wonchang Choi In this article by Kim et al1 there was an error in the grant number. The incorrect grant number was given (NRF-2020R1A2C1004949). This is corrected to NRF-2018R1A2B2007081. The authors apologize for any inconvenience that it may have caused. REFERENCE 1Kim H, Lee Y, Byun D, Choi W. TiNb2O7 microsphere anchored by polydopamine-modified graphene oxide as a superior anode material in lithium-ion batteries. Int J Energy Res. 2020; 44(6): 4986- 4996. Wiley Online LibraryCASWeb of Science®Google Scholar Volume44, Issue825 June 2020Pages 7103-7103 ReferencesRelatedInformation

Purpose. The research was aimed to determine the dependence of the specific surface area and pore size distribution on the synthesis temperature for nanoporous carbon obtained from titanium carbide by chlorine treatment. Methodology. Nanoporous carbon has been obtained by treating titanium carbide powder with a stream of chlorine in a flow-type experimental setup at temperature range from 300°C to 1 200 °C. The specific surface area and pore size have been determined using automatic equipment (Quantachrome, USA) with computer control and data processing. To determine the specific surface, the Brunauer – Emmett – Teller (BET) method has been used. The porous structure of carbon, namely the pore volume and its size distribution, has been determined on the basis of the non-local density functional theory (NLDFT) using the software which is supplied with the device. Results . It has been experimentally established that change of chlorination temperature at titanium carbide processing effects on the pore size of the resulting carbon and allows controlling the same pore size in a narrow size range. With increasing temperature, the total pore volume and specific surface area increase as well and reach their maximum value at a synthesis temperature of 1 000 ° C (up to 1 442 m 2 /g according to BET), while the number of micropores decreases and mesoporosity increases. Scientific novelty . It has been found for the first time that due to a change in the temperature of titanium carbide chlorination it is possible to obtain nanoporous carbon with a controlled pore size up to 2 nm. Practical significance . The research results can be used for developing technology of supercapacitor production.

Improving the storage capacities of electrode materials is one of the most critical points for ion batteries. Two-dimensional (2D) topological semimetals with high carrier mobility are naturally suitable as electrode materials. Herein, using the first-principle calculations, 2D BP monolayer with Dirac-type band structure is predicted to be a superior anode material with ultrahigh capacity for both Li/Na-ion batteries. The BP monolayer remains metallic after the adsorption of Li/Na ions, ensuring a good conductivity. Furthermore, BP owns low diffusion barriers (0.35 eV for Li ions and 0.16 eV for Na ions) and a moderate lattice change (3%) during the process of charging and discharging. Remarkably, the storage capacity of monolayer BP is enhanced to 1924 mAh/g by multilayer adsorption of both Li/Na ions, much higher than those of most previous 2D anode materials. All these characteristics strongly suggest that BP has great potential as a superior anode material in Li/Na-ion batteries.

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This study aims to produce an efficient adsorbent derived from 4 different biomass and to study the characterization of blending hydrogel from 4 different biomass. Type of material used to produce biochar is corn husk(CH), rice husk(RH), sugarcane bagasse(SB), and sawdust(SW). These four materials are blending with fly ash with different ratios. For hydrogel preparation, Acrylamide (AAm) is used as the monomer, N, N’ – methylenebisacrylamide (MBA) as a crosslinker, and ammonium persulfate (APS) as an initiator. This hydrogel – biochar is then characterized by Brunauer – Emmet – Teller (BET) surface area analysis, Thermo Gravimetric Analysis (TGA), and swelling test analysis. Seven samples are analyzed for each raw material: fly ash hydrogel(FA) and corn husk hydrogel. For example like SW: FA (1.0:0), SW: FA (0.8:0.2), SW: FA (0.6:0.4), SW: FA (0.5:0.5), SW: FA (0.4:0.6), SW:FA (02:08) and lastly SW:FA (0:1.0). Repeated with the same ratio for the other biomasses. For BET surface area analysis, samples with large surface areas and high pore volumes are suitable for the adsorbent. SW: FA (0.8:0.2) has the largest surface area, which is 6.9966 m2/g, while the total pore volume is the highest compared to the other samples. In a proximate analysis, Thermogravimetric Analysis (TGA) determined the moisture content, ash content, fixed carbon content, and volatile matter content. A sample with the high volatile matter, high carbon content, and low ash content is more economically attractive. Sample of SW :FA (0.8:0.2) has high moisture content, fixed carbon, volatile matter, and has the lowest ash content among all. All the samples showed a positive impact on the swelling test. Therefore, a sample of SW: FA (0.8:0.2) is the best and suitable to use as an adsorbent.

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