一种非均质梯度高硅负极极片及其制备方法与应用
By employing a gradient distribution design of silicon and graphite on the negative electrode sheet of a lithium-ion battery, the problems of low graphite capacity and easy destruction of silicon-based negative electrode structure are solved, realizing a lithium-ion battery with high energy density and long life, and simplifying the manufacturing process.
Patent Information
- Application Number
- CN202310869680.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-14
- Publication Date
- 2026-07-17
- Estimated Expiration
- 2043-07-14
AI Technical Summary
The theoretical specific capacity of graphite, an existing lithium-ion battery anode material, is low. The structure of silicon-based anodes is easily damaged during lithium insertion/extraction cycling, leading to a decline in cycle performance. Furthermore, existing pre-lithiation technology is difficult to implement and has low production efficiency, failing to meet the demand for high energy density.
The silicon-carbon anode sheet with a heterogeneous gradient design forms a gradient electrode by coating silicon and graphite on the current collector. The silicon content decreases from the inside to the outside, while the graphite content increases from the inside to the outside. Combined with a special slurry formulation and processing technology, this optimizes the lithium-ion intercalation process.
It significantly improves the energy density and cycle performance of lithium-ion batteries, reduces electrode expansion rate, extends battery life, simplifies manufacturing process, and is suitable for mass production.
Smart Images
Figure CN116960277B_ABST
Abstract
Citation Information
Patent Citations
Graphite / silicon gradient electrode material and preparation method and fast charging application thereof
CN114156458A