Related Experiment Video
Updated: Oct 5, 2025
Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
Published on: January 20, 2023
Coordination-Assisted Precise Construction of Metal Oxide Nanofilms for High-Performance Solid-State Batteries
Sijie Guo1,2, Yutao Li3, Bing Li1
1CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190, People's Republic of China.
A new wet-chemistry method creates uniform nanofilms for solid-state batteries (SSBs), significantly reducing interfacial resistance and improving cycle life. This low-cost technique offers a scalable alternative to vapor deposition for advanced battery development.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Solid-state batteries (SSBs) face challenges with poor interfacial contact between solid-state electrolytes (SSEs) and electrodes, particularly lithium metal anodes.
- Current methods for creating artificial intermediate nanofilms, like atomic layer deposition, are costly, energy-intensive, and slow due to their layer-by-layer nature.
Purpose of the Study:
- To develop an easy, low-cost wet-chemistry fabrication process for engineering the anode/solid electrolyte interface in SSBs with nanoscale precision.
- To demonstrate the effectiveness of this method in improving interfacial contact and battery performance.
Main Methods:
- Utilized a coordination-assisted deposition process initiated with polyacrylate acid as a functional polymer.
- Controlled surface reactions to modulate metal precursor distribution and decomposition, forming uniform, crack-free metal oxide nanofilms.
- Deposited artificial Al2O3 nanofilms on a garnet-structured Li6.5La3Zr1.5Ta0.5O12 (LLZT) ceramic SSE.
Main Results:
- Achieved a significant decrease in Li/LLZT interfacial resistance from 2079.5 to 8.4 Ω cm².
- Demonstrated extraordinarily long cycle life for the assembled SSBs.
- Enabled the use of a high-capacity nickel-rich cathode (LiNi0.83Co0.07Mn0.1O2) to deliver 201.5 mAh g⁻¹ at 4.8 mg cm⁻² loading.
Conclusions:
- The solution-based route provides an affordable and scalable alternative to vapor-based deposition techniques for SSB manufacturing.
- This strategy accelerates the development of high-performance SSBs for practical applications.
- The engineered interface significantly enhances the electrochemical performance and stability of solid-state batteries.
