Dual-Function Regeneration of Waste Lithium Cobalt Oxide for Stable High Voltage Cycle Performance

With the development of society and increased demand for clean energy, as an efficient energy storage device, lithium-ion batteries are widely used in various fields. As they fail, a large number of waste lithium-ion batteries will be produced. If not handled properly, it will not only cause the loss of nonferrous metals but also cause serious environmental pollution. This article proposes a new concept of using waste lithium-ion battery material to directly reuse it for the next generation of secondary batteries. It is a new strategy to prepare a dual-function regeneration material by direct regeneration technology, which is not limited to the traditional idea of valuable metal recovery, and solve the problem of raw material source and waste recycling of the new battery system. Waste lithium cobaltite cathode powder was used to supplement the metal ions Li+, Mg2+, and Ce4+ for heat treatment. The demand of direct regeneration and synergistic modification was achieved in a green and efficient way. The discharge capacity of the material is 226.346 mAh/g at 4.6 V. In this study, the dual-function regeneration strategy is expected to accelerate the industrialization process of waste lithium-ion batteries.