(Spent lithum-ion battery recycling) The demand of lithium-ion batteries is experiencing rapid growth because of the surging market of electric cars, portable electronics, and renewable energy storage needs. The limited availability of Li, Co, and Ni poses a significant sustainability challenge for the developing of the energy storage needs. Meanwhile, the limited lifetime of lithium-ion battery gradually increased the burden of waste management. Therefore, seeking for an efficient and environmentally friendly method to recycle the materials in spent lithium-ion battery are imperative. Currently, pyrometallurgy and hydrometallurgy are the two primary routes for recycling valuable materials in lithium-ion batteries, but their processes always involve high-temperature treatment and use of acid or base leaching, which can lead to challenging disposal issues. We propose an innovative recycling process for spent lithium-ion battery without using acid-or base- additives. Our proposed method has demonstrated an impressive lithium extraction efficiency of 97.5%, with extraction efficiencies of 99% for Co, Cu, and Al. Notably, the resulting products, including cobalt sulfate (CoSO4·xH2O), lithium sulfate (Li2SO4·xH2O), and cobalt oxide (Co3O4), hold the potential to be directly employed in the production of active cathode materials.