Details

Autor(en) / Beteiligte

• Zou, Chao
• Qiao Liu, Wei
• Li Pan, Jun
• Liu, Huan
• Liu, Yu
• Fa Zhou, Quan

Titel

Study on recycling waste LiNi0.5Co0.2Mn0.3O2 materials

Ist Teil von

• Ferroelectrics, 2019-09, Vol.549 (1), p.153-159

Ort / Verlag

Philadelphia: Taylor & Francis

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The process of recycling the waste LiNi 0.5 Co 0.2 Mn 0.3 O 2 materials has been proposed. Firstly, based on hydrometallurgy, a mixed solution of citric acid and lactose was used to leach valuable metals from the waste cathode materials. Orthogonal experiments were designed to determine the effect of various factors on the leaching efficiency. The results show that the combination of optimal conditions is temperature 90 °C, lactose concentration 0.6 wt%, citric acid concentration 1.5 M, reaction time 60 min, solid - to - liquid ratio 30 g·L −1 and stirring speed 450 rpm. Under the optimal conditions, the leaching efficiency of Li, Mn, Co and Ni is 96.43%, 95.80%, 95.73% and 94.27%, respectively. Then, the leachate was used to resynthesize the new LiNi 0.5 Co 0.2 Mn 0.3 O 2 materials (RNCM) by using the co-precipitation method. Under the voltage of 2.8- 4.5 V, the initial discharge capacity of the RNCM is 179.67 1 and 148.35 mAh·g −1 at the discharge rate of 0.1C and 1C, respectively, and the first 50 cycles capacity retention rate is 93.07% and 81.87% at the discharge rate of 0.1C and 1C, respectively. The result shows that the electrochemical properties of the RNCM are equivalent to those of the purchased LiNi 0.5 Co 0.2 Mn 0.3 O 2 materials.