This study presents an integrated solar microevaporator system for efficient and sustainable lithium extraction from hypersaline salt-lake brines, addressing the challenges of sluggish adsorption kinetics and intensive water usage in current lithium extraction technologies. The system, composed of a dual-functional lithium titanate (LTO)/N-doped mesoporous carbon (NMC) nanocomposite loaded onto lightweight polystyrene (PS) microbeads, demonstrates a 98% solar energy harvesting efficiency. This efficiency significantly enhances the endothermic Li⁺ extraction process and solar steam generation. Under one sun irradiation, the Li⁺ recovery capacity increases from 12.4 mg g⁻¹ to 28.7 mg g⁻¹, and the adsorption kinetics rate doubles compared to conditions at 280 K (salt-lake temperature). The system also exhibits self-cleaning desalination capabilities, achieving near 100% water recovery from brines, which is crucial for self-sustaining Li⁺ elution. Outdoor experiments verified the system's stability and efficiency, with a lithium recovery rate of >8 mg g⁻¹ and water recovery of 440 m³ per ton of Li₂CO₃ produced. This integrated solution offers a promising approach for sustainable lithium extraction with near-zero water and carbon consumption, contributing to carbon neutrality.This study presents an integrated solar microevaporator system for efficient and sustainable lithium extraction from hypersaline salt-lake brines, addressing the challenges of sluggish adsorption kinetics and intensive water usage in current lithium extraction technologies. The system, composed of a dual-functional lithium titanate (LTO)/N-doped mesoporous carbon (NMC) nanocomposite loaded onto lightweight polystyrene (PS) microbeads, demonstrates a 98% solar energy harvesting efficiency. This efficiency significantly enhances the endothermic Li⁺ extraction process and solar steam generation. Under one sun irradiation, the Li⁺ recovery capacity increases from 12.4 mg g⁻¹ to 28.7 mg g⁻¹, and the adsorption kinetics rate doubles compared to conditions at 280 K (salt-lake temperature). The system also exhibits self-cleaning desalination capabilities, achieving near 100% water recovery from brines, which is crucial for self-sustaining Li⁺ elution. Outdoor experiments verified the system's stability and efficiency, with a lithium recovery rate of >8 mg g⁻¹ and water recovery of 440 m³ per ton of Li₂CO₃ produced. This integrated solution offers a promising approach for sustainable lithium extraction with near-zero water and carbon consumption, contributing to carbon neutrality.