High-Quality Epitaxial N Doped Graphene on SiC with Tunable Interfacial Interactions via Electron/Ion Bridges for Stable Lithium-Ion Storage

IF 31.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nano-Micro Letters Pub Date : 2023-08-18 DOI:10.1007/s40820-023-01175-6

Changlong Sun, Xin Xu, Cenlin Gui, Fuzhou Chen, Yian Wang, Shengzhou Chen, Minhua Shao, Jiahai Wang

引用次数: 0

Abstract

Highlights

The intimate NG@SiC heterostructure has been constructed via a direct thermal decomposition method.
The NG@SiC heterostructure anode delivers enhanced capacity and cycling stability both in the half-cell and in the full cell.
DFT analysis reveals that this NG@SiC anode possesses lower lithium-ion adsorption energy and higher charge and discharge rates.

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高质量外延N掺杂石墨烯在SiC上的电子/离子桥可调谐界面相互作用，用于稳定锂离子存储。

定制sic基阳极材料中的界面相互作用对于实现更高的能量容量和更长的锂离子存储循环寿命至关重要。在本文中，通过在SiC (NG@SiC)上外延生长高质量N掺杂石墨烯(NG)，实现了原子尺度的可调谐界面相互作用。这个精心设计的NG@SiC异质结展示了一个具有强烈界面相互作用的本征电场，使其成为深入了解电子/离子桥构型和原子间电子迁移机制的理想原型。密度泛函理论(DFT)分析和电化学动力学分析表明，这些有趣的电子/离子桥可以通过界面耦合化学键控制和调整界面相互作用，增强界面电荷转移动力学，防止粉化/聚集。作为概念验证研究，这种精心设计的NG@SiC阳极显示出良好的可逆容量(在0.1 a g-1下循环200次后为1197.5 mAh g-1)和循环耐久性，在10.0 a g-1下循环1000次后为447.8 mAh g-1，容量保持率为76.6%。正如预期的那样，锂离子电池(LiFePO4/C//NG@SiC)表现出优越的倍率能力和循环稳定性。这种通过外延生长方法实现的界面相互作用定制策略为传统的sic基阳极实现高性能锂离子存储提供了新的机会。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

42.40

自引率

4.90%

发文量

715

审稿时长

13 weeks

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary and open-access journal that focus on science, experiments, engineering, technologies and applications of nano- or microscale structure and system in physics, chemistry, biology, material science, pharmacy and their expanding interfaces with at least one dimension ranging from a few sub-nanometers to a few hundreds of micrometers. Especially, emphasize the bottom-up approach in the length scale from nano to micro since the key for nanotechnology to reach industrial applications is to assemble, to modify, and to control nanostructure in micro scale. The aim is to provide a publishing platform crossing the boundaries, from nano to micro, and from science to technologies.