N, S co-doped coal-based hard carbon prepared by two-step carbonization and a molten salt template method for sodium storage

NIU Hui-zhu; WANG Hai-hua; SUN Li-yu; YANG Chen-rong; WANG Yu; CAO Rui; YANG Cun-guo; WANG Jie; SHU Ke-wei

doi:10.1016/S1872-5805(24)60842-5

Volume 39 Issue 2

Apr. 2024

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Article Navigation > New Carbon Mater. > 2024 > 39(2): 297-307

NIU Hui-zhu, WANG Hai-hua, SUN Li-yu, YANG Chen-rong, WANG Yu, CAO Rui, YANG Cun-guo, WANG Jie, SHU Ke-wei. N, S co-doped coal-based hard carbon prepared by two-step carbonization and a molten salt template method for sodium storage. New Carbon Mater., 2024, 39(2): 297-307. doi: 10.1016/S1872-5805(24)60842-5

Citation:

NIU Hui-zhu, WANG Hai-hua, SUN Li-yu, YANG Chen-rong, WANG Yu, CAO Rui, YANG Cun-guo, WANG Jie, SHU Ke-wei. N, S co-doped coal-based hard carbon prepared by two-step carbonization and a molten salt template method for sodium storage. New Carbon Mater., 2024, 39(2): 297-307. doi: 10.1016/S1872-5805(24)60842-5

Citation:

NIU Hui-zhu, WANG Hai-hua, SUN Li-yu, YANG Chen-rong, WANG Yu, CAO Rui, YANG Cun-guo, WANG Jie, SHU Ke-wei. N, S co-doped coal-based hard carbon prepared by two-step carbonization and a molten salt template method for sodium storage. New Carbon Mater., 2024, 39(2): 297-307. doi: 10.1016/S1872-5805(24)60842-5

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N, S co-doped coal-based hard carbon prepared by two-step carbonization and a molten salt template method for sodium storage

doi: 10.1016/S1872-5805(24)60842-5

NIU Hui-zhu^1
,,
WANG Hai-hua^{1, 2, 3
,
,},
SUN Li-yu¹,
YANG Chen-rong¹,
WANG Yu⁴,
CAO Rui¹,
YANG Cun-guo¹,
WANG Jie¹,
SHU Ke-wei^{1
,
,}

1.
School of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
2.
Xi’an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi University of Science and Technology, Xi’an 710021, China
3.
Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi’an 710021, China
4.
Xi’an North Huian Chemical Industry Co, Xi’an 710302, China

Funds: The authors express sincere thanks to the National Natural Science Foundation of China (21978164, 22078189 and 22105120), Outstanding Youth Science Fund of Shaanxi Province (2021JC-046), Special Support Program for high level talents of Shaanxi Province, Innovation Support Program of Shaanxi Province (2021JZY-001), Key Research and Development Program of Shaanxi Province (2020GY-243) and Special Research Fund of Education Department of Shaanxi (20JK0535)

More Information

Author Bio:
牛慧祝，在读博士. E-mail：1219231271@qq.com
Corresponding author: WANG Hai-hua, Professor. E-mail: whh@sust.edu.cn; SHU Ke-wei, Associate Professor. E-mail: shukw@sust.edu.cn
Received Date: 2023-12-04
Accepted Date: 2024-01-29
Rev Recd Date: 2024-01-27

Available Online: 2024-02-06

Publish Date: 2024-04-03

Abstract

Abstract

Hard carbon, known for its abundant resources, stable structure and high safety, has emerged as the most popular anode material for sodium-ion batteries (SIBs). Among various sources, coal-derived hard carbon has attracted extensive attention. In this work, N and S co-doped coal-based carbon material (NSPC1200) was synthesized through a combination of two-step carbonization process and heteroatom doping using long-flame coal as a carbon source, thiourea as a nitrogen and sulfur source, and NaCl as a template. The two-step carbonization process played a crucial role in adjusting the structure of carbon microcrystals and expanding the interlayer spacing. The N and S co-doping regulated the electronic structure of carbon materials, endowing more active sites. Additionally, the introduction of NaCl as a template contributed to the construction of pore structure, which facilitates better contact between electrodes and electrolytes, enabling more efficient transport of Na⁺ and electrons. Under the synergistic effect, NSPC1200 exhibited exceptional sodium storage capacity, reaching 314.2 mAh g⁻¹ at 20 mA g⁻¹. Furthermore, NSPC1200 demonstrated commendable cycling stability, maintaining a capacity of 224.4 mAh g⁻¹ even after 200 cycles. This work successfully achieves the strategic tuning of the microstructure of coal-based carbon materials, ultimately obtaining hard carbon anode with excellent electrochemical performance.
- Hard carbon,
- Sodium-ion battery,
- Coal-derived carbon,
- Two-step carbonization,
- N and S co-doped

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References(49)

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