Ultrasound-Assisted Synthesis of Na0.44MnO2/CQDs Composites as Cathode Materials with Long Life and Rate Capability for Sodium-Ion Batteries

IF 2.8 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electronic Materials Pub Date : 2026-07-23 DOI:10.1007/s11664-026-13045-z

Xiaoli Cao, Xinwei Wang, Limin Zhu, Daorong Li

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引用次数: 0

Abstract

Na_0.44MnO₂ (NMO), a pristine material, has been achieved through the application of the rheological phase reaction technique, and carbon quantum dots (CQDs) were also successfully synthesized. CQDs are composited onto the surface of the native material using the ultrasound-assisted method, to form a series of Na_0.44MnO₂/CQDs (NMO/CQDs) composites with different mass ratios, which were assembled into sodium-ion batteries (SIBs) as the cathode material. Physical characterization showed that the crystal characteristics of NMO were not changed by the arrival of the CQDs, the surface of NMO was successfully compounded with CQDs, and the morphological features of NMO were not changed. Charge/discharge tests results showed that the NMO/CQD-3 wt.% composite material possessed a highest discharge specific capacity of up to 141.7 mAh g⁻¹, which is a significant increase compared with that of the native material. In conclusion, the utilization of ultrasound-assisted techniques in the synthesis process of NMO/CQD composites as cathode materials for SIBs has the potential to enhance the electrochemical performance of NMO.

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超声辅助合成钠离子电池正极材料Na0.44MnO2/CQDs复合材料

利用流变相反应技术制备出了原始材料Na0.44MnO2 (NMO)，并成功合成了碳量子点（CQDs）。采用超声辅助的方法将CQDs复合到原生材料表面，形成一系列不同质量比的Na0.44MnO2/CQDs （NMO/CQDs）复合材料，作为正极材料组装成钠离子电池（sib）。物理表征表明，CQDs的存在没有改变NMO的晶体特性，NMO表面与CQDs成功复合，NMO的形态特征没有改变。充放电测试结果表明，NMO/CQD-3 wt.%复合材料的放电比容量最高可达141.7 mAh g−1，与原材料相比有显著提高。综上所述，利用超声辅助技术合成NMO/CQD复合材料作为SIBs的正极材料，有可能提高NMO的电化学性能。

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.