Youyu Zhu , Xiaofang Tang , Zhenghan Kong , Zonglin You , Yixi Zhang , Yingfeng Duan , Yating Zhang
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引用次数: 0
Abstract
Bituminous coal, with its moderate anthracene content, high reactivity, and ease of modulation, stands out as a favorable choice as a precursor for hard carbon. However, due to the highly condensed aromatic rings in bituminous coal, it tends to form highly graphitized structures after high-temperature carbonization. Therefore, pretreatment of bituminous coal is necessary to suppress the graphitization process. Here, we combine pre-oxidation techniques with high-temperature carbonization to produce a cost-effective, high carbon yield, and superior performance coal-based hard carbon. When utilized as anode for sodium-ion batteries, the prepared coal-based hard carbon exhibits a high reversible capacity of 313.5 mAh g−1, along with excellent rate capability and long cycling stability.
烟煤具有蒽含量适中、反应活性高、易于调制等特点，是硬质碳前驱体的理想选择。然而，由于烟煤中的芳香环高度缩合，在高温碳化后容易形成高度石墨化的结构。因此，有必要对烟煤进行预处理，以抑制石墨化过程。在这里，我们将预氧化技术与高温碳化技术相结合，生产出了一种成本低、产炭率高、性能优越的煤基硬质碳。将制备的煤基硬质碳用作钠离子电池的负极时，其可逆容量高达 313.5 mAh g-1，同时还具有优异的速率能力和长循环稳定性。
期刊介绍：
This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on:
(i) physics and chemistry of defects in solids;
(ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering;
(iii) ion transport measurements, mechanisms and theory;
(iv) solid state electrochemistry;
(v) ionically-electronically mixed conducting solids.
Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties.
Review papers and relevant symposium proceedings are welcome.
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