锌掺杂的 MnCO3 作为锌离子水电池的阴极材料

IF 6.7 2区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Wentao Sun, Tao Li, Yu Ma, Xiangming Zheng, Yang Liu, Aokui Sun
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引用次数: 0

摘要

锌离子水电池(AZIBs)以其高放电容量、低成本和相对较低的环境影响而著称,是先进能源储存的一种有前途的替代方案。对新型电极材料和 AZIBs 反应机制的探索引起了广泛关注。作为一种电极材料,MnCO 以其安全性、无毒性和广泛的原材料供应而著称。然而,MnCO 阴极的使用受到一些限制,包括寿命短和导电性降低。为了解决这些问题,人们添加了含有 Zn、Co 和 Ni 元素的化合物,以改善 MnCO 材料的性能。通过溶热法成功合成了掺杂锌的 MnCO(MnCO-Zn-0.0015 M),它呈现出球形外壳的特殊微观结构。球形外壳的微观结构不仅提高了堆积密度,而且外壳层内的孔隙结构也有利于锌的插入和提取。MnCO-Zn-0.0015 M 材料在 0.1 A g 的电流密度下工作时,放电容量高达 120.4 mAh∙g ,同时具有显著的速率性能。考虑到这些结果,本研究开发的 MnCO-Zn-0.0015 M 材料为优化锰化合物在水性锌离子电池中的使用开辟了一条新途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Zn-doped MnCO3 as cathode material for aqueous zinc-ion batteries
Aqueous zinc-ion batteries (AZIBs), known for their high discharge capacity, low cost, and relatively low environmental impact, are a promising alternative for advanced energy storage. The exploration of novel electrode materials and the reaction mechanisms in AZIBs have garnered considerable attention. MnCO, as an electrode material, is known for its safety, nontoxic nature, and widespread availability as a raw material. Nevertheless several constraints limit the use of MnCO cathodes, including short lifespan and reduced electrical conductivity. To resolve these shortcomings, compounds containing Zn, Co and Ni elements were added to improve the properties of the MnCO material. The Zn doped MnCO (MnCO–Zn-0.0015 M) was successful synthesized by solvothermal, which presents a special microstructure of spherical shell. Not only does the spherical microstructure of the shell enhance the packing density, but the pore configuration within the shell layer also facilitates the insertion and extraction of Zn. The MnCO–Zn-0.0015 M material, operating at a current density of 0.1 A g, exhibited an impressive discharge capacity of 120.4 mAh∙g along with remarkable rate performance. The cathode sustained 75.29 % of its capacity following 1000th cycles at current density of 1.0 A g. Considering these results, the MnCO–Zn-0.0015 M material developed in this study opens a novel avenue for optimizing the use of manganese compounds in aqueous zinc-ion batteries.
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来源期刊
CiteScore
8.90
自引率
6.80%
发文量
596
审稿时长
33 days
期刊介绍: Materials Today Chemistry is a multi-disciplinary journal dedicated to all facets of materials chemistry. This field represents one of the fastest-growing areas of science, involving the application of chemistry-based techniques to the study of materials. It encompasses materials synthesis and behavior, as well as the intricate relationships between material structure and properties at the atomic and molecular scale. Materials Today Chemistry serves as a high-impact platform for discussing research that propels the field forward through groundbreaking discoveries and innovative techniques.
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