Well-Dispersed Manganese-Oxo Clusters as Anode Materials for High-Performance Lithium Ion Batteries.

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL ACS Catalysis Pub Date : 2024-09-18 Epub Date: 2024-09-04 DOI:10.1021/acs.nanolett.4c02887

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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Abstract

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.

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分散良好的锰氧团簇作为高性能锂离子电池的负极材料。

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。

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来源期刊

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.