导电二元酸玻璃涂层用于改善硫化物为基础的全固态电池中的富含的正电极
Jiayao Luo1,2, Bangjun Guo3, Nana Li1
1The Soft2D Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China.
Nature communications
|October 28, 2025
概括
富含Ni的层状氧化物电极上的薄导电酸盐玻璃涂层显著提高了硫化物全固态电池的性能. 这种具有成本效益的方法提高了下一代电池的稳定性和能量密度.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 富含的分层氧化物阴极对于高能全固态电池至关重要.
- 提高它们的电化学性能和稳定性,特别是在硫化物电解质中,仍然是一个关键的挑战.
- 实际应用需要具有成本效益和高性能电极解决方案.
研究的目的:
- 为富含Ni的多层氧化物正电极开发一个具有成本效益的涂层策略.
- 提高这些电极的电化学性能和长期稳定性,以硫化物为基础的全固态电池.
- 研究涂层提高电池性能的机制.
主要方法:
- 在单晶LiNi0.8Co0.1Mn0.1O2.2.上施加了薄 (~3nm) 导电二元酸玻璃 (0.5Li2O·0.5B2O3) 涂层.
- 对于涂层应用,采用了一种简单的干燥工艺,然后加热.
- 通过使用硬币细胞和袋细胞评估电化学性能,并使用各种表征技术来补充.
主要成果:
- 涂层电极在20 mA g-1下产生了209 mAh g-1的特定容量,初始库伦比效率为79.7%.
- 在200 mA g-1的1000个循环后,它保持了87.8%的容量,并实现了14.6 mAh cm-2.2的面积容量.
- 袋式电池表现出383Wh kg-1的特定能量,并且在66.67 mA g-1.1下维持了300个周期.
结论:
- 导电性玻酸盐玻璃涂层有效地增强了离子传输,并稳定了正电极网格.
- 涂层加强了正极和硫化物电解质之间的接口,提高了电池的整体稳定性.
- 这种方法使所有固态电池的高压正电极具有高稳定性和特定能量.
相关概念视频
Formation of Complex Ions
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
Batteries 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...
Electrodeposition
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
Electrochemical Systems
Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...
Electrochemical Cells
Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
The Electrical Double Layer
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...


