Related Experiment Video
Updated: Aug 16, 2026
12:28
Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells
Published on: February 1, 2016
Constructing zero-external-pressure high-performance sulfide all-solid-state pouch cells via asymmetric interfacial
Tao Liu1, Tenghui Wang1, Zecheng Fang1
1Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
Science Advances
|August 14, 2026
Summary
Researchers developed a new interface for sulfide solid electrolyte (SSE)-based all-solid-state lithium metal batteries (ASSLBs). This innovation enables stable battery cycling without external pressure, paving the way for practical pouch cell applications.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Sulfide solid electrolyte (SSE)-based all-solid-state lithium metal batteries (ASSLBs) offer high ion conductivity and deformability.
- Practical application of ASSLB pouch cells is limited by the need for high external pressure to maintain interfacial contact.
Purpose of the Study:
- To design an interface that enables stable cycling of ASSLB pouch cells under zero external pressure.
- To overcome the limitations of high-external-pressure requirements in current ASSLB technology.
Main Methods:
- Designed an asymmetric interfacial layer composed of electron buffer and ion conductor layers.
- Investigated the interfacial response using lithium-tin alloy and lithium iodide.
- Tested coin cells and assembled pouch cells for cycling stability and performance.
Main Results:
- Achieved stable room-temperature cycling of sulfide-based ASSLB pouch cells under zero external pressure.
- Demonstrated an asymmetric interfacial electrophilic response enabling stable lithium deposition/stripping.
- Coin cells retained 81.1% capacity after 5000 cycles; pouch cells achieved 376 Wh/kg with 85.7% retention over 300 cycles.
Conclusions:
- The developed asymmetric interface effectively eliminates the need for external pressure in ASSLB pouch cells.
- This strategy significantly advances the practical realization of high-performance, pressure-free sulfide-based ASSLBs.
- The technology shows promise for stable battery operation even at low temperatures (0°C).
Related Concept Videos
01:30The 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...
02:26Preparation and Reactions of Sulfides
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
01:28Electrochemical 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...
03:02Standard Electrode Potentials
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
02:47Voltaic/Galvanic Cells
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
01:21Cell Diagrams and IUPAC Conventions
Electrochemical cell notation is a standardized symbolic representation that communicates the structure and reaction pathway of galvanic and electrolytic cells. This notation plays a critical role in describing redox reactions and electrochemical cell configurations without the need for detailed diagrams.In electrochemical cell notation, a single vertical line “|” denotes a phase boundary, such as between a solid electrode and an aqueous solution. A double vertical line “||” represents a salt...