Bibliographic Details
| Title: |
葡萄糖衍生硫掺杂碳包覆锑/钼硫化物的 制备及其储钠性能. |
| Alternate Title: |
High-performance sodium-ion storage based on glucose-derived S-doped carbon coated Sb/Mo-sulfide composites. |
| Authors: |
孙 颖1 yingsun@lnu.edu.cn, 张 坤1, 马佳鑫1, 刘 畅2 liuchang2596@163.com, 吴抒遥1, 邱介山2,3, 张 薇1 weizhanghx@lnu.edu.cn |
| Source: |
Clean Coal Technology. 2026, Vol. 32 Issue 2, p239-248. 10p. |
| Subject Terms: |
*Sodium ion batteries, *Anodes, *Energy storage, *Carbon-based materials, *Carbon electrodes, *Sulfur |
| Abstract (English): |
The pressing need for low-cost long-cycling sodium-ion batteries (SIBs) for large-scale energy storage underscores the critical importance of high-performance carbon-based anode materials. Targeting the core challenges of severe volume expansion and poor cycling stability in metal sulfide anodes during sodiation/desodiation,this study proposes a facile and green material design strategy. Using glucose(C6H12O6) as the carbon source and thioacetamide as the sulfur source, a one-step hydrothermal sulfidation followed by calcination was employed to synthesize a sulfur-doped carbon-coated Sb-Mo-S composite (Sb2S3/Mo2S3@SC) from a bimetallic oxide precursor for application as an anode in SIBs. Structural and morphological characterizations confirm that with an appropriate ratio of the carbon source, a composite structure consisting of metal sulfide nanoflowers encapsulated by a stable carbon layer was successfully fabricated. This carbon layer not only acts as a mechanical skeleton to effectively buffer volume expansion during cycling and inhibit material pulverization but also significantly enhances electron conduction and optimizes reaction kinetics. Electrochemical tests show that with a precursor (Sb2 MoO6) to glucose mass ratio of 1∶3, the obtained Sb2S3/Mo2S3@SC-3 exhibits excellent sodium storage performance. After 200 cycles at a current density of 0.2 A/g and 500 cycles at 1 A/g, the electrode delivered specific capacities of 678.47 and 589.77 mAh/g, respectively, demonstrating exceptional sodium-ion storage capabilities. This anode exhibits reversible capacities of629.84 and 484.73 mAh/g at 0.05 and 5 A/g, respectively, corresponding to a high-rate capacity. Notably, upon reverting to 0.05 A/g, the specific capacity recovered to 645.36 mAh/g, indicating superb rate performance and structural reversibility. Kinetic analysis further reveals that the charge storage is dominated by pseudocapacitive behavior, accompanied by a high sodium ion diffusion coefficient. This work, through the ingenious cooperative design of carbon coating and sulfur doping, provides a new approach for developing anode materials for SIBs that combine high capacity, long lifespan, and superior rate performance. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
面向大规模储能对高性价比、长循环稳定钠离子电池 (SIBs) 的迫切需求, 开发高性能碳基负极材料至关重要。针对金属硫化物负极在储钠过程中体积膨胀严重、循环稳定性差的核心挑战, 提出了一种简易绿色的材料设计策略: 以葡萄糖 ( C 6 H 12 O 6) 为碳源, 硫代乙酰胺为硫源, 对双金属氧化物前驱体进行一步水热硫化及后续煅烧处理, 成功制备了硫掺杂碳包覆的 Sb-Mo- S 复合材料 (Sb2 S 3/Mo2 S 3@SC), 并将其应用于 SIBs 的负极。结果表明: 当碳源葡萄糖添加比例合适时, 成功制备了由金属硫化物纳米花与稳定碳层组成的复合结构。该碳层不仅作为机械骨架有效缓冲了充放电过程中的体积膨胀, 抑制了材料粉化, 还显著增强了电子传导, 优化了反应动力学。电化学测试结果显示: 当前驱体 Sb2MoO6和葡萄糖的投料质量比为 1∶3 时, 所得的 Sb2 S 3/Mo2 S 3@SC-3 具有优异的储钠性能, 在 0.2 和 1 A / g 的电流密度下分别循环 200 圈和 500 圈后, 其比容量分别为 678.47 和 589.77 mAh/ g, 具有出色的循环性能。在 0.05 和 5 A / g 的电流密度下, 比容量分别为 629.84 和 484.73 mAh/ g, 当电流密度恢复到 0.05 A / g 后, 比容量为 645.36 mAh/ g, 具有优异的倍率性能。动力学分析进一步揭示, 其电荷存储以赝电容行为为主导, 并具有较高的钠离子扩散系数。研究通过巧妙的碳包覆与硫掺杂协同设计, 为开发兼具高容量、长寿命和优异倍率性能的钠离子电池负极材料提供了新思路。 [ABSTRACT FROM AUTHOR] |
| Database: |
Energy & Power Source |
