可充电锌离子水电池中 α-MnO2 储能的新型改进策略和全面机理分析

IF 19.5 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Carbon Energy Pub Date : 2024-04-05 DOI:10.1002/cey2.536
Fan Xiankai, Xiang Kaixiong, Zhou Wei, Deng Weina, Zhu Hai, Chen Liang, Chen Han
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引用次数: 0

摘要

锌离子水电池一直被认为是替代锂离子电池的最有潜力的候选电池。然而,抑制锌枝晶生长和不良反应、实现完全可接受的机理等许多严峻挑战也尚未解决。在这里,α-MnO2 纳米线与碳纳米管的共生复合微球得以实现,并能有效抑制 ZnSO4-3Zn(OH)2-nH2O 的肆意结晶。使用微球组装的电极在电流密度为 0.05 A g-1 时可提供较高的初始容量,并在 2500 次循环中保持了 88% 的显著高容量保持率。此外,通过对 ZnSO4-3Zn(OH)2-nH2O 的定量和定性分析,全面研究了多价锰氧化物发挥协同效应的新型储能机制。通过对 ZnSO4-3Zn(OH) 2-nH2O 的定量和定性分析,全面研究了多价锰氧化物在转化过程中的能力贡献和晶体结构剖析。因此,我们的研究可为设计改良电极结构提供新的策略,并全面了解α-MnO2阴极的储能机理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A novel improvement strategy and a comprehensive mechanism insight for α-MnO2 energy storage in rechargeable aqueous zinc-ion batteries

A novel improvement strategy and a comprehensive mechanism insight for α-MnO2 energy storage in rechargeable aqueous zinc-ion batteries

A novel improvement strategy and a comprehensive mechanism insight for α-MnO2 energy storage in rechargeable aqueous zinc-ion batteries

Aqueous zinc-ion batteries have been regarded as the most potential candidate to substitute lithium-ion batteries. However, many serious challenges such as suppressing zinc dendrite growth and undesirable reactions, and achieving fully accepted mechanism also have not been solved. Herein, the commensal composite microspheres with α-MnO2 nano-wires and carbon nanotubes were achieved and could effectively suppress  ZnSO4·3Zn(OH)2·nH2O rampant crystallization. The electrode assembled with the microspheres delivered a high initial capacity at a current density of 0.05 A g−1 and maintained a significantly prominent capacity retention of 88% over 2500 cycles. Furthermore, a novel energy-storage mechanism, in which multivalent manganese oxides play a synergistic effect, was comprehensively investigated by the quantitative and qualitative analysis for ZnSO4·3Zn(OH)2·nH2O. The capacity contribution of multivalent manganese oxides and the crystal structure dissection in the transformed processes were completely identified. Therefore, our research could provide a novel strategy for designing improved electrode structure and a comprehensive understanding of the energy storage mechanism of α-MnO2 cathodes.

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来源期刊
Carbon Energy
Carbon Energy Multiple-
CiteScore
25.70
自引率
10.70%
发文量
116
审稿时长
4 weeks
期刊介绍: Carbon Energy is an international journal that focuses on cutting-edge energy technology involving carbon utilization and carbon emission control. It provides a platform for researchers to communicate their findings and critical opinions and aims to bring together the communities of advanced material and energy. The journal covers a broad range of energy technologies, including energy storage, photocatalysis, electrocatalysis, photoelectrocatalysis, and thermocatalysis. It covers all forms of energy, from conventional electric and thermal energy to those that catalyze chemical and biological transformations. Additionally, Carbon Energy promotes new technologies for controlling carbon emissions and the green production of carbon materials. The journal welcomes innovative interdisciplinary research with wide impact. It is indexed in various databases, including Advanced Technologies & Aerospace Collection/Database, Biological Science Collection/Database, CAS, DOAJ, Environmental Science Collection/Database, Web of Science and Technology Collection.
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