Crosslinked Carbon Negative Electrode for Li-Ion Battery

The patent applies local quality by differentiating the treatment of different regions of the carbon material. The surface functional groups are selectively crosslinked to reduce reactivity, while the bulk carbon structure maintains its lithium ion storage capability. This is achieved through surface treatment processes that modify only the outer layers of the carbon particles, preserving the internal structure's capacity function while eliminating the surface's harmful reactivity.

The patent employs composite materials by combining carbon material with crosslinking agents to form a modified carbon surface structure. The crosslinked surface layer acts as a protective composite that reduces electrolyte reactivity while the underlying carbon material maintains its electrochemical function. This composite approach creates a hierarchical structure with different functional zones.

The patent converts the harmful surface functional groups into beneficial crosslinked structures. The crosslinking process transforms the reactive surface groups that cause electrolyte decomposition into stable crosslinked networks that protect the carbon material. This converts the original harmful reactivity into a protective function, reducing electrolyte decomposition while maintaining lithium ion storage capability.

The patent applies parameter changes by modifying the chemical state of surface functional groups through crosslinking. The crosslinking reaction changes the chemical parameters of the surface groups, reducing their reactivity toward electrolyte decomposition. This parameter modification maintains the physical structure needed for lithium ion occlusion while altering the chemical reactivity to prevent harmful side reactions.

The patent applies preliminary action by performing crosslinking treatment on the carbon material before electrode production rather than after. This timing allows the crosslinked carbon particles to be incorporated into the electrode structure with proper adhesion properties already established. The crosslinked surface provides sufficient adhesion during electrode formation without creating excessive polymer adhesion to the current collector, thus maintaining current-collecting performance.

The patent applies segmentation by treating only the carbon material particles individually through crosslinking, rather than treating the entire electrode assembly. This particle-level crosslinking ensures that each carbon particle has improved adhesion properties independently, while the overall electrode structure maintains proper electrical connectivity to the current collector without excessive polymer adhesion.