Wang Qimeng, Wu Jianping, Wang Mingming, Yu Haizhou, Qiu Xiaoyan, Chen Wei
Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing, 211816, P. R. China.
Department of Applied Chemistry, School of Chemistry and Materials Science, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Adv Sci (Weinh). 2024 Mar;11(11):e2307872. doi: 10.1002/advs.202307872. Epub 2024 Jan 4.
Aqueous zinc-ion batteries (AZIBs) are considered as attractive energy storage systems with great promise owing to their low cost, environmental friendliness and high safety. Nevertheless, cathode materials with stable structure and rapid diffusion of zinc ions are in great demand for AZIBs. In this work, a new kind of potassium vanadate compound (KV O ) is synthesized with fibrous morphology as an excellent cathode material for AZIBs, which shows outstanding electrochemical performance. KV O exhibits a high discharge capacity of 556.4 mAh g at 0.8 A g , and the capacity retention is 81.3% at 6 A g even after a long cycle life of 5000 cycles. The excellent performance of the KV O cathode is benefited from the structural stability, sufficient active sites, and high conductivity, which is revealed by in situ X-ray diffraction and various other characterizations. This work offers a new design strategy into fabricating high efficiency cathode materials for AZIBs and beyond.
水系锌离子电池（AZIBs）因其低成本、环境友好和高安全性而被认为是具有巨大潜力的有吸引力的储能系统。然而，对于AZIBs来说，迫切需要具有稳定结构和锌离子快速扩散的阴极材料。在这项工作中，合成了一种具有纤维形态的新型钒酸钾化合物（KV O ）作为AZIBs的优异阴极材料，其表现出出色的电化学性能。KV O 在0.8 A g 时具有556.4 mAh g 的高放电容量，即使在5000次循环的长循环寿命后，在6 A g 时容量保持率仍为81.3%。KV O 阴极的优异性能得益于结构稳定性、充足的活性位点和高导电性，这通过原位X射线衍射和各种其他表征得以揭示。这项工作为制造用于AZIBs及其他领域的高效阴极材料提供了一种新的设计策略。
