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Duan X, Yu J, Liu Y, Lan Y, Zhou J, Lu B, Zan L, Fan Z, Zhang L. A highly conductive and robust micrometre-sized SiO anode enabled by an in situ grown CNT network with a safe petroleum ether carbon source. Phys Chem Chem Phys 2024; 26:12628-12637. [PMID: 38597698 DOI: 10.1039/d4cp00116h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
SiO-based materials as lithium-ion anodes have attracted huge attention owing to their ultrahigh capacity. However, they usually undergo severe volume expansion over the repeated lithiation/delithiation processes and have low electronic conductivity, leading to an inferior cycling stability and poor rate capability. In this study, carbon nanotubes in situ grown on the surface of commercially available micro-sized SiO (D50 = 5 μm) were prepared. The conductive network composed of one-dimensional carbon nanotubes could enhance its conductivity and enhance the structural stability during the cycling. The synthesized 3D-SiO@C material demonstrates good long-term cycling stability, with a reversible capacity of up to 687.7 mA h g-1 after 1000 cycles, and it maintains a high reversible capacity of 736.8 mA h g-1, even at a high current density of 1 A g-1.
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Affiliation(s)
- Xiaobo Duan
- Department of Materials Science & Engineering, Xi'an University of Science and Technology, Xi'an710054, China.
| | - Jiaao Yu
- Department of Materials Science & Engineering, Xi'an University of Science and Technology, Xi'an710054, China.
| | - Yancai Liu
- Department of Materials Science & Engineering, Xi'an University of Science and Technology, Xi'an710054, China.
| | - Yanqiang Lan
- Department of Materials Science & Engineering, Xi'an University of Science and Technology, Xi'an710054, China.
| | - Jian Zhou
- Department of Materials Science & Engineering, Xi'an University of Science and Technology, Xi'an710054, China.
| | - Birou Lu
- Department of Materials Science & Engineering, Xi'an University of Science and Technology, Xi'an710054, China.
| | - Lina Zan
- Department of Materials Science & Engineering, Xi'an University of Science and Technology, Xi'an710054, China.
| | - Zimin Fan
- Department of Materials Science & Engineering, Xi'an University of Science and Technology, Xi'an710054, China.
| | - Lei Zhang
- Department of Materials Science & Engineering, Xi'an University of Science and Technology, Xi'an710054, China.
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Liu Q, Peng B, Cai N, Su Y, Wang S, Wu P, Cao Q, Zhang H. Simultaneous production of high-valued carbon nanotubes and hydrogen from catalytic pyrolysis of waste plastics: The role of cellulose impurity. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 174:420-428. [PMID: 38104414 DOI: 10.1016/j.wasman.2023.12.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 11/30/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023]
Abstract
Upcycling waste plastics into valuable carbon nanotubes (CNTs) and hydrogen via catalytic pyrolysis is a sustainable strategy to mitigate white pollution. However, real-world plastics are complex and generally contain organic impurities, such as cellulose, which have a non-negligible impact on the catalytic pyrolysis process and product distribution. In this study, cellulose was chosen as a model compound to distinguish the effects of oxygen-containing components on the CNTs and hydrogen production during the catalytic pyrolysis of waste polypropylene. Different amounts of cellulose were mixed with polypropylene to regulate the O/C mass ratio of the feedstock, and the relationship between the O/C mass ratio and the yield of products has been built quantificationally. The results revealed that the relative content of CNTs increased to over 95%, and the stability and purity of carbon deposition increased accordingly when the O/C mass ratio is 0.05. This could be ascribed to the etching effects caused by small amounts of H2O and CO2 on amorphous carbon. However, further increasing the amount of cellulose caused the deactivation of the Fe-Ni catalyst. This not only decreased the carbon yield but had an adverse impact on its morphology and graphitization, leading to the increase of amorphous carbon. This study can provide fundamental guidance for the efficient utilization of waste plastics that take advantage of organic impurities in waste plastic to promote the formation of high-purity CNTs.
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Affiliation(s)
- Qingyu Liu
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China
| | - Bo Peng
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China
| | - Ning Cai
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, PR China
| | - Yinhai Su
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China
| | - Siyu Wang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China
| | - Peng Wu
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China
| | - Qi Cao
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China
| | - Huiyan Zhang
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, PR China.
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Wang Y, Fan X, Du Q, Shang Y, Li X, Cao Z, Wang X, Li J, Xie Y, Gan W. Magnetic Heating Amorphous NiFe Hydroxide Nanosheets Encapsulated Ni Nanoparticles@Wood Carbon to Boost Oxygen Evolution Reaction Activity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2206798. [PMID: 37010010 DOI: 10.1002/smll.202206798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/08/2023] [Indexed: 06/19/2023]
Abstract
The oxygen evolution reaction (OER) has significant effects on the water-splitting process and rechargeable metal-air batteries; however, the sluggish reaction kinetics caused by the four-electron transfer process for transition metal catalysts hinder large-scale commercialization in highly efficient electrochemical energy conversion devices. Herein, a magnetic heating-assisted enhancement design for low-cost carbonized wood with high OER activity is proposed, in which Ni nanoparticles are encapsulated in amorphous NiFe hydroxide nanosheets (a-NiFe@Ni-CW) via direct calcination and electroplating. The introduction of amorphous NiFe hydroxide nanosheets optimizes the electronic structure of a-NiFe@Ni-CW, accelerating electron transfer and reducing the energy barrier in the OER. More importantly, the Ni nanoparticles located on carbonized wood can function as magnetic heating centers under the effect of an alternating current (AC) magnetic field, further promoting the adsorption of reaction intermediates. Consequently, a-NiFe@Ni-CW demonstrated an overpotential of 268 mV at 100 mA cm-2 for the OER under an AC magnetic field, which is superior to that of most reported transition metal catalysts. Starting with sustainable and abundant wood, this work provides a reference for highly effective and low-cost electrocatalyst design with the assistance of a magnetic field.
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Affiliation(s)
- Yaoxing Wang
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Northeast Forestry University, Harbin, 150040, China
| | - Xueqin Fan
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Northeast Forestry University, Harbin, 150040, China
| | - Qiuyu Du
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Northeast Forestry University, Harbin, 150040, China
| | - Ying Shang
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Northeast Forestry University, Harbin, 150040, China
| | - Xueqi Li
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Northeast Forestry University, Harbin, 150040, China
| | - Zhifeng Cao
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Northeast Forestry University, Harbin, 150040, China
| | - Xuan Wang
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Northeast Forestry University, Harbin, 150040, China
| | - Jian Li
- Engineering Research Center of Advanced Wooden Materials (Ministry of Education), Northeast Forestry University, Harbin, 150040, China
| | - Yanjun Xie
- Engineering Research Center of Advanced Wooden Materials (Ministry of Education), Northeast Forestry University, Harbin, 150040, China
| | - Wentao Gan
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Northeast Forestry University, Harbin, 150040, China
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