Bitong Zhang, Tianyu Qiu, Yingqi Li, Yang Li, Feiyang Yu, Hongliang Dong, Yong-Hui Wang, Yang-Guang Li, Hua-Qiao Tan
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引用次数: 0
摘要
金属氧化物团簇具有定义明确的纳米结构和多电子氧化还原活性，因此在锂离子电池负极材料的应用中大有可为。然而，它们固有的不理想导电性和聚集倾向使其难以得到充分利用。本文通过合理采用具有纳米尺寸和高导电性的碳点（CDs）作为稳定剂，构建了一种分散良好的 Mn12O12(CH3COO)16(H2O)4 （简称 Mn12）团簇。得益于 Mn12 团簇完全暴露的氧化还原位点和额外的界面储能机制，优化后的 Mn12/CDs-1:20 阳极在 0.2 A g-1 (0.25 C) 的条件下可提供 1643 mAh g-1 的高比容量，并表现出卓越的速率和循环能力。本文首次为合成分散良好的锰氧团簇提供了一个绿色高效的范例，并为基于团簇的能量存储构建了一个新平台。
Well-Dispersed Manganese-Oxo Clusters as Anode Materials for High-Performance Lithium Ion Batteries.
Metal-oxo clusters show great promise in lithium ion battery applications as anode materials by virtue of their native nature of well-defined nanostructures and multielectron redox activities. However, their intrinsic unsatisfactory electrical conductivity and tendency to aggregation make them difficult to fully utilize. Herein, a well-dispersed Mn12O12(CH3COO)16(H2O)4 (denoted as Mn12) cluster is constructed by rationally adopting carbon dots (CDs) with nanosize and high conductivity as stabilizers. Thanks to the fully exposed redox sites of Mn12 clusters and additional interfacial energy storage mechanism, the optimized Mn12/CDs-1:20 anode delivers a high specific capacity of 1643 mAh g-1 at 0.2 A g-1 (0.25 C) and exhibits outstanding rate and cycling capabilities. This paper provides a green and efficient paradigm to synthesize well-dispersed manganese-oxo clusters for the first time and builds a new platform for cluster-based energy storage.
期刊介绍：
Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including:
- Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale
- Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies
- Modeling and simulation of synthetic, assembly, and interaction processes
- Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance
- Applications of nanoscale materials in living and environmental systems
Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.
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