This technology involves manufacturing a composite by intentionally oxidizing the black phosphorus (BP) surface through air exposure to make it hydrophilic, thereby inducing strong P-O-C chemical bonds with carbon nanotubes (CNTs). It also maximizes electrochemical stability by forming dehydration cross-links with a binary binder.
While black phosphorus has a high theoretical capacity, it suffers from significant volume expansion of 300–500% during charge and discharge cycles. This leads to electrode pulverization and loss of electrical contact, resulting in a rapid decline in capacity.
This technology consists of synthesizing crystalline black phosphorus via a first-stage milling process, exposing it to air for 20–60 minutes to render the surface hydrophilic, and then using a second-stage milling process to form chemical bonds and cross-linked structures with carbon nanotubes. A 3D network is also achieved between electrode components using a NaCMC-PAA binary binder. Applicable to high-energy lithium-ion battery anodes, phosphorus-based sodium-ion battery anodes, and long-life EV cells, it secures interfacial bonding through a simple air-exposure process without requiring additional chemical treatments.
N/A
