Related Experiment Video
Updated: Aug 5, 2026
10:03
Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
Dual-Layer Protected Silicon Anode With In Situ Converted MnSiO3 Interlayer and Carbon Shell for Lithium-Ion
Pengliang Gu1, Shiyue Zhang1, Wenkai Wang1
1State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|August 4, 2026
Summary
Silicon anodes for lithium-ion batteries show promise but suffer from expansion and conductivity issues. A new dual-layer protective structure (Si@MnSiO3@C) effectively addresses these challenges, enhancing battery performance and stability.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Silicon (Si) anodes offer high energy density for lithium-ion batteries (LIBs).
- Key challenges include significant volume expansion during cycling and poor electrical conductivity.
- These issues lead to capacity fading and limited cycle life.
Purpose of the Study:
- To develop a novel protective structure for Si anodes to overcome their inherent limitations.
- To enhance the electrochemical performance, cycling stability, and rate capability of Si-based anodes.
- To investigate the role of a dual-layer coating in buffering volume changes and improving ion/electron transport.
Main Methods:
- Fabrication of a dual-layer protective structure (Si@MnSiO3@C) on Si anodes.
- Utilizing an in-situ conversion reaction to form the inner MnSiO3 layer from native SiO2.
- Applying a chemical vapor deposition carbon coating for the outer layer.
Main Results:
- The Si@MnSiO3@C composite demonstrated robust interfacial adhesion via Si─O─Mn covalent bonds.
- The structure effectively buffered volume expansion and enhanced electron transport and Li+ diffusion.
- Achieved high initial Coulombic efficiency (80.1%), excellent capacity retention (86.1% after 100 cycles), and long-term stability (1334 mAh g-1 after 600 cycles at 1 A g-1).
Conclusions:
- The dual-layer protective structure significantly improves the performance of Si anodes for LIBs.
- Interfacial engineering is a viable strategy for designing advanced energy storage materials.
- The Si@MnSiO3@C composite shows great potential for next-generation high-energy-density batteries.
Related Concept Videos
01:25MOS Capacitor
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
03:12Batteries and Fuel Cells
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...