College of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 412007, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
Molecules. 2023 Feb 24;28(5):2147. doi: 10.3390/molecules28052147.
In terms of new-generation energy-storing devices, aqueous zinc-ion batteries (AZIBs) are becoming the prime candidates because of their inexpensive nature, inherent safety, environmental benignity and abundant resources. Nevertheless, due to a restrained selection of cathodes, AZIBs often perform unsatisfactorily under long-life cycling and high-rate conditions. Consequently, we propose a facile evaporation-induced self-assembly technique for preparing VO@carbonized dictyophora (VO@CD) composites, utilizing economical and easily available biomass dictyophora as carbon sources and NHVO as metal sources. When assembled in AZIBs, the VO@CD exhibits a high initial discharge capacity of 281.9 mAh g at 50 mA g. The discharge capacity is still up to 151.9 mAh g after 1000 cycles at 1 A g, showing excellent long-cycle durability. The extraordinary high electrochemical effectiveness of VO@CD could be mainly attributed to the formation of porous carbonized dictyophora frame. The formed porous carbon skeleton can ensure efficient electron transport and prevent VO from losing electrical contact due to volume changes caused by Zn intercalation/deintercalation. The strategy of metal-oxide-filled carbonized biomass material may provide insights into developing high-performance AZIBs and other potential energy storage devices, with a wide application range.
在新一代储能器件中，水系锌离子电池（AZIBs）由于其成本低、本质安全、环境友好和资源丰富等优点，成为首选。然而，由于阴极材料选择有限，AZIBs 在长循环寿命和高倍率条件下的性能往往不尽如人意。因此，我们提出了一种简便的蒸发诱导自组装技术，用于制备 VO@碳化香菇（VO@CD）复合材料，利用经济且易得的生物质香菇作为碳源和 NHVO 作为金属源。在 AZIBs 中组装时，VO@CD 在 50 mA g 时具有 281.9 mAh g 的高初始放电容量。在 1 A g 下循环 1000 次后，放电容量仍高达 151.9 mAh g，表现出优异的长循环耐久性。VO@CD 的非凡高电化学效率主要归因于多孔碳化香菇框架的形成。形成的多孔碳骨架可以确保有效的电子传输，并防止 VO 因 Zn 嵌入/脱嵌引起的体积变化而失去电接触。这种金属氧化物填充碳化生物质材料的策略可能为开发高性能 AZIBs 和其他潜在储能设备提供思路，具有广泛的应用范围。
