In the context of the energy transformation resulting from climate change, the future of transport lies in electric drive systems. Here, the lithium ion battery stands out from all other storage media due to its properties such as energy density and a low self-discharge rate. The increase in production of electric vehicles is accompanied by an increase in the number of LIBs produced. These are declared as hazardous materials and must be recycled in a sensible manner after their period of use. To close the material cycle and to guarantee the security of supply for the partly critical raw materials, the implementation of recycling methods prove to be useful. The active material used in the case of E-mobility is in most cases an NMC mixed oxide (nickel manganese cobalt). Here, above all, the high prices of the valuable metals make recovery lucrative from an economic point of view. But with the increasing environmental awareness, the ecological aspects cannot be neglected in industrial process development. In hydrometallurgical processes, the use of organic acids as leaching reagents proves to be particularly suitable in terms of their properties such as, low emission of toxic gases, reactivity at low temperatures and their corresponding biodegradability. In the theoretical part, this work aims to give an understanding of the chemical mechanisms of dissolution, reaction kinetics and of the phenomena documented in the literature in hydrometallurgical recycling processes. In the experimental part, leaching experiments were carried out using formic, oxalic, citric and ascorbic acid as leaching reagents and the partial use of hydrogen peroxide as reductant. Experiments were designed using MODDE 12, a program that calculates data points of metal concentration in solution via a full factorial experimental design and using statistical methods. Summarizing the results in a contour plot reveals which elements are preferentially or selectively transferred into solution, whereas the parameters of time and temperature are considered.