Silicon nanocomposite anode
The silicon polymer nanocomposite (Si/PNC) anode, featuring a silicon/graphite composite and advanced binder and conductive additives, addresses the volume expansion challenges in silicon-based anodes, achieving high capacity retention and improved cycling stability for lithium-ion batteries.
Patent Information
- Application Number
- PCT/SG2024/050683
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-10-25
- Filing Date
- 2024-10-25
- Publication Date
- 2025-05-01
AI Technical Summary
Silicon-based anodes in lithium-ion batteries face challenges such as significant volume expansion during lithiation and de-lithiation, leading to cracking, pulverization, and rapid capacity degradation due to anisotropic volume changes.
A silicon polymer nanocomposite (Si/PNC) anode is developed, comprising a silicon/graphite composite as the anode active material, combined with conductive additives like carbon black, a binder such as crosslinked chitosan, and binder additives like tin nanoparticles or MXene, to enhance mechanical stability and electrical conductivity.
The Si/PNC anode achieves high capacity retention and improved cycling stability, with specific capacities of up to 1800 mAh/g and capacity retention of over 80% after 1500 cycles, effectively addressing the volume expansion issues and enhancing the overall performance of lithium-ion batteries.