纳米花
纳米团簇
氧化还原
水溶液
材料科学
碲
电化学
锌
动力学
碳纤维
化学工程
无机化学
兴奋剂
纳米技术
电极
化学
纳米结构
冶金
工程类
物理化学
物理
复合材料
复合数
量子力学
光电子学
作者
Honghai Wang,Wenyue Yang,Huiting Xu,Meng Li,Huibin Liu,Siqi Gong,Fan Zhao,Chunli Li,Junjie Qi,Wenchao Peng,Jiapeng Liu
出处
期刊:Small
[Wiley]
日期:2023-08-27
卷期号:19 (50)
被引量:7
标识
DOI:10.1002/smll.202304504
摘要
Abstract Aqueous zinc‐ion batteries (AZIBs) are considered to be one of the most promising devices for large‐scale energy storage systems owing to their high theoretical capacity, environmental friendliness, and safety. However, the ionic intercalation or surface redox mechanisms in conventional cathode materials generally result in unsatisfactory capacities. Conversion‐type aqueous zinc–tellurium (Zn–Te) batteries have recently gained widespread attention owing to their high theoretical specific capacities. However, it remains an enormous challenge to improve the slow kinetics of the aqueous Zn–Te batteries. Here, MoO 2 nanoclusters embedded in hierarchical nitrogen‐doped carbon nanoflower (MoO 2 /NC) hosts are successfully synthesized and loaded with Te in aqueous Zn–Te batteries. Benefitting from the highly dispersed MoO 2 nanoclusters and hierarchical nanoflower structure with a large specific surface area, the electrochemical kinetics of the Te redox reaction are significantly improved. As a result, the Te‐MoO 2 /NC electrode exhibits superior cycling stability and a high specific capacity of 493 mAh g −1 at 0.1 A g −1 . Meanwhile, the conversion mechanism is systematically explored using a variety of ex situ characterization methods. Therefore, this study provides a novel approach for enhancing the kinetics of the Te redox reaction in aqueous Zn–Te batteries.
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