Liu Sainan, Sun Yangyang, Yang Jing, Zhang Yi, Cai Zhenyang
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
School of Materials Science and Engineering, Central South University, Changsha 410083, China.
Materials (Basel). 2022 Aug 29;15(17):5954. doi: 10.3390/ma15175954.
Aqueous zinc-ion batteries (ZIBS) are becoming more popular as the use of energy storage devices grows, owing to advantages such as safety and an abundant zinc supply. In this study, molybdenum powder was loaded directly on carbon fiber cloth (CFC) via multi-arc ion plating to obtain Mo@CFC, which was then oxidatively heated in a muffle furnace for 20 min at 600 °C to produce high mass loading α-MoO@CFC (α-MoO of 12-15 mg cm). The cells were assembled with α-MoO@CFC as the cathode and showed an outstanding Zn storage capacity of 200.8 mAh g at 200 mA g current density. The capacity retention rate was 92.4 % after 100 cycles, along with an excellent cycling performance of 109.8 mAh g following 500 cycles at 1000 mA g current density. Subsequently, it was shown that CFC-loaded α-MoO cathode material possessed significantly improved electrochemical performance when compared to a cell constructed from commercial MoO using conventional slurry-based electrode methods. This work presents a novel yet simple method for preparing highly loaded and binder-free cathodic materials for aqueous ZIBs. The results suggest that the highly loaded cathode material with a high charge density may be potentially employed for future flexible device assembly and applications.
随着储能设备使用量的增加，水系锌离子电池（ZIBS）因其具有安全性高和锌供应丰富等优点而越来越受欢迎。在本研究中，通过多弧离子镀将钼粉直接负载在碳纤维布（CFC）上以获得Mo@CFC，然后在马弗炉中于600℃氧化加热20分钟，以制备高质量负载的α-MoO@CFC（α-MoO的负载量为12-15 mg cm）。以α-MoO@CFC作为阴极组装的电池在200 mA g电流密度下表现出200.8 mAh g的出色锌存储容量。在100次循环后容量保持率为92.4%，在1000 mA g电流密度下进行500次循环后循环性能优异，为109.8 mAh g。随后表明，与使用传统浆料基电极方法由商业MoO构建的电池相比，负载CFC的α-MoO阴极材料具有显著改善的电化学性能。这项工作提出了一种新颖且简单的方法来制备用于水系ZIBs的高负载且无粘结剂的阴极材料。结果表明，具有高电荷密度的高负载阴极材料可能潜在地用于未来的柔性器件组装和应用。
