Effect of conductive agent on the electronic conductivity of mixed powder & electrode

Positive and negative electrode powder materials, separators, electrolytes, conductive agents, binders, current collectors, etc. are the main raw materials for the manufacture of lithium-ion batteries; the production of lithium-ion batteries is the process of processing these raw materials into batteries under the optimal process conditions. Changes in the parameters of these raw materials require targeted optimization and adjustment of the process conditions to obtain lithium-ion batteries with optimal electrical performance. The design of the parameters of the positive and negative electrode sheets of lithium-ion batteries is the key to the development of lithium battery processes, including active material loading, porosity, thickness, and the ratio between active materials, conductive agents, and binders. Among them, the type , content, and performance of the conductive agent are key factors affecting the electron transmission during the charging and discharging process of lithium-ion batteries, and the electron conduction characteristics directly determine the quality of the electrochemical performance.

Latent dissolution behavior of electrolytes: high voltage, high stability batteries | NSR

Potassium-ion batteries are low-cost, abundant in resources, and have a potential high voltage window, showing great potential in the field of large-scale energy storage. The electrolyte has a significant impact on the performance of the battery. Ether-based electrolytes have attracted much attention because they can effectively dissolve potassium salts and provide high ionic conductivity. However, this type of electrolyte also has obvious shortcomings: weak antioxidant ability and poor compatibility with graphite negative electrode materials . This greatly limits its application in battery systems.

Lithium battery double-layer coating technology principle

Double-layer coating is a multi-layer microstructure design for lithium-ion battery pole pieces to improve electrode performance, such as:

Research and application of new binders in lithium batteries

I. Introduction

In the electrode materials of lithium batteries, the proportion of binder is usually between 1% and 10%. Its main function is to bind the active materials, current collectors and conductive agents of the electrode together, thereby enhancing the performance and stability of the electrode. The active materials and conductive agents in the electrode are often nano-scale, and these nano-materials are prone to agglomeration in high-concentration electrode slurries.

Analysis of Lithium Battery Injection Process

The role of lithium battery electrolyte is to conduct ions between the positive and negative electrodes and act as a medium for charging and discharging, just like blood in the human body. How to make the electrolyte fully and evenly infiltrate the interior of the lithium battery has become an important issue. Therefore, the injection process is a very important process that directly affects the performance of the battery.

The "Breathing Technique" in Lithium Battery Baking: Decoding the Core Technology of Nitrogen Cycle

Why is nitrogen circulation introduced in the vacuum baking of lithium batteries? The seemingly safe inert gas actually hides the risk of condensation! Behind the efficiency improvement is the ultimate control of the "breathing rhythm" by precision technology - this article deciphers the game logic of nitrogen filling, dehumidification and risk prevention and control.

Is it necessary to introduce nitrogen circulation during vacuum baking of battery cells? When filling with nitrogen, the pressure inside the cavity will change. Will the moisture condense again and affect the baking effect?

Salt-assisted recovery of sodium metal anode for high-rate sodium batteries———Wei Weifeng AM, Central South University

 Wei Weifeng AM, Central South University: Salt-assisted recovery of sodium metal anode for high-rate sodium batteries

Background

Rechargeable sodium metal batteries are considered to be one of the most promising electrochemical energy storage systems with high energy density and high cost performance. However, the inactive sodium (Na) formed during storage and assembly processes has seriously hindered its practical application. This chemical instability stems from the high activity of Na, which chemically reacts with oxygen and moisture during electrode processing or electrochemically reacts with the electrolyte during battery operation, easily leading to excessive accumulation of inactive Na species on the surface, resulting in battery performance degradation or even failure.